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Academic literature on the topic 'Scan head'

Author: Grafiati

Published: 28 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Scan head"

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Munir, M., T. Shouter, and H. S. Tay. "63 Quality Improvement Project: Should We be Doing More or Less Ct Head Scans in the Health Care of Older People Department?" Age and Ageing 49, Supplement_1 (February 2020): i18—i20. http://dx.doi.org/10.1093/ageing/afz187.04.

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Abstract Introduction Older people are likely to have more CT head scans given their multiple co- morbidities, being on anticoagulants, and increased falls. The aims of this quality improvement project (QIP) were to identify the number of patients who had CT head scan, the reason/indication of it, the number of patients who had new finding/s on it, actions taken on new findings, and whether the management plan was altered because of the CT scan. Methods Medical notes and CT head scan reports of all patients admitted to the Health Care of Older People department from April to September 2018 were reviewed to evaluate the indications of CT head scans, new findings, and management plans following the findings. Results 461 (10.7%) out of the 4323 patients discharged from the healthcare of older people department during April to September 2018 had CT head scans during admission. Frequent indications for CT head scans included delirium, falls and head injury. Only 46 (9.9%) patients had new finding/s on the CT head scan, and action was taken on 26 (56.5%) of these patients. The CT head scan changed the management plan of only 17 (3.6%) patients. Please see Table for more details. Conclusions By using our clinical judgement, following NICE guidelines on head injuries, educating our colleagues on the criteria for requesting a CT head scan, taking collateral histories about patients’ cognition and ascertaining the mechanism of fall, we can lessen the financial burden on the NHS and minimise the radiation exposure to our patients.

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Tsao, Shao-Lun, Yin-Yang Chen, Liang-Tsai Yeh, Jing-Yang Huang, Wen-Tyng Li, Shun-Fa Yang, and Chao-Bin Yeh. "Impact of Computed Tomography Scans on the Risk of Thyroid Disease in Minor Head Injury Patients: A Population-Based Retrospective Cohort Study." International Journal of Environmental Research and Public Health 17, no. 11 (May 29, 2020): 3873. http://dx.doi.org/10.3390/ijerph17113873.

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We investigated the association between head computed tomography (CT) scans and the risk of noncancer thyroid diseases in patients with minor head injury in a Taiwanese healthcare setting. For this retrospective population-based cohort study, the 2009–2013 Longitudinal Health Insurance Database was used to include patients with a minor head injury at admission or emergency visit between 2009 and 2013. Multivariate analysis with a multiple Cox regression model was applied to analyze the data. According to whether a CT scan was conducted within 14 days of admission, patients were divided into a CT scan group (n = 14,041) or a non-CT scan group (n = 34,684). No increased incidence of thyroid diseases was observed in the CT scan group regardless of the number of CT scans performed. The incidence rate ratio for one scan was 1.10 (95% confidence interval: 0.94–1.29) and for two or more scans was 1.09 (95% confidence interval: 0.93–1.28). In conclusion, this population-based cohort study showed that a head CT scan is not associated with increased risk of thyroid disease in patients with minor head injury. The short-term adverse effects on the thyroid could be mild when a regular CT scan is appropriately performed.

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Yuana, Firdi, Kusharto Kusno, and Achmad Hidayat. "Determining Effective Dose on Computed Tomography Scan (CT SCAN) in Head Scanning." Natural-B 1, no. 1 (April 1, 2011): 81–86. http://dx.doi.org/10.21776/ub.natural-b.2011.001.01.11.

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Rieke-Zapp, D. H., and E. Trinkl. "Face to face - close range inspection of head vases." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W5 (August 21, 2017): 601–4. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w5-601-2017.

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Several hundred attic head vases are known worldwide and stored in museums and collections. In 1929, Beazley has categorized twenty groups (A-W) based on stylistic properties and historic methodology. Head vases are assembled in several steps, most important for our comparison is the moulding of the head area. While the other parts of head vases like the size of the handle and the painting can differ significantly from each other, one can notice similarities in the head shapes of the same group. Since molds were used to shape the heads, our initial hypothesis was to perform a quantitative comparison of head shapes based on digital scan data. Comparison of scan data is straight forward and is very similar to quality control and inspection processes in industrial applications. Nonetheless, quality control of approximately 2,500-year-old artefacts that are distributed among several different places is not straight forward. Initial analysis was performed on older scan data. In addition, a high-resolution fringe projection scanner was employed to scan further head vases in additional museums in Germany and Italy. Scan resolution and accuracy of approximately 0.1 mm in all dimensions were required to reveal differences below 1 mm. All new scans were performed with an AICON SmartScan-HE C8. This scanner captures not only shape, but at the same time records color textures which can be employed for presentation or future analyses. Shape analysis results of the head areas do not only confirm that it is likely that the same mold was used for shaping some of the head vases. According to these results, it is also not unlikely that a first generation of larger head vases was used to prepare molds for consecutive generations of head vases that are slightly smaller by 10-15%. This volume loss resembles closely the volume loss observed after oven-burning of pottery. Scanning will continue to increase the data set for further analyses.

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Morton, Ryan P., Renee M. Reynolds, Rohan Ramakrishna, Michael R. Levitt, Richard A. Hopper, Amy Lee, and Samuel R. Browd. "Low-dose head computed tomography in children: a single institutional experience in pediatric radiation risk reduction." Journal of Neurosurgery: Pediatrics 12, no. 4 (October 2013): 406–10. http://dx.doi.org/10.3171/2013.7.peds12631.

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Object In this study, the authors describe their experience with a low-dose head CT protocol for a preselected neurosurgical population at a dedicated pediatric hospital (Seattle Children's Hospital), the largest number of patients with this protocol reported to date. Methods All low-dose head CT scans between October 2011 and November 2012 were reviewed. Two different low-dose radiation dosages were used, at one-half or one-quarter the dose of a standard head CT scan, based on patient characteristics agreed upon by the neurosurgery and radiology departments. Patient information was also recorded, including diagnosis and indication for CT scan. Results Six hundred twenty-four low-dose head CT procedures were performed within the 12-month study period. Although indications for the CT scans varied, the most common reason was to evaluate the ventricles and catheter placement in hydrocephalic patients with shunts (70%), followed by postoperative craniosynostosis imaging (12%). These scans provided adequate diagnostic imaging, and no patient required a follow-up full-dose CT scan as a result of poor image quality on a low-dose CT scan. Overall physician comfort and satisfaction with interpretation of the images was high. An additional 2150 full-dose head CT scans were performed during the same 12-month time period, making the total number of CT scans 2774. This value compares to 3730 full-dose head CT scans obtained during the year prior to the study when low-dose CT and rapid-sequence MRI was not a reliable option at Seattle Children's Hospital. Thus, over a 1-year period, 22% of the total CT scans were able to be converted to low-dose scans, and full-dose CT scans were able to be reduced by 42%. Conclusions The implementation of a low-dose head CT protocol substantially reduced the amount of ionizing radiation exposure in a preselected population of pediatric neurosurgical patients. Image quality and diagnostic utility were not significantly compromised.

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Siregar, Elshaday S. B., Gusti Ngurah Sutapa, and I. Wayan Balik Sudarsana. "Analysis of Radiation Dose of Patients on CT Scan Examination using Si-INTAN Application." BULETIN FISIKA 21, no. 2 (July 6, 2020): 53. http://dx.doi.org/10.24843/bf.2020.v21.i02.p03.

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CT scan is widely used to diagnose the inside of the human body, so supervision is needed to ensure the health and safety of workers, patients and the public. One surveillance that can be done is to analyze the radiation dose of the patient on CT scan with the application of Si-INTAN. Data processing of the results of CT scan of the head, thorax and abdomen for ages 0-4 years, 5-14 years and ? 15 years using the Si-INTAN application. From the results of the data processing, the highest DRL DLP value and CTDIVOL values were obtained, for CT scan heads were 1732,8 mGycm and 31,92 mGy, the CT scan of the thorax was 2450,78 mGycm and 19,36 mGy, and for CT Abdominal Scans were 3968,85 mGycm and 19,35 mGy.

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Elmoheen, Amr, Waleed Salem, and Khalid Bashir. "Reducing unnecessary CT scan of the head for minor paediatric head injuries at the emergency department." BMJ Open Quality 10, no. 1 (January 2021): e000973. http://dx.doi.org/10.1136/bmjoq-2020-000973.

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The CT scan is a determining imaging study in the diagnosis and treatment of head trauma; however, its indiscriminate application can have serious consequences for patients and the health system. More than 45% of CT scans of the head requested for minor head injuries in the paediatric age group in the emergency department were not correctly indicated according to international guidelines. The root of such a high percentage was misinformation and lack of knowledge about the ideal parameters for requesting a CT scan for minor head injuries. To achieve this, survey-based interventions and educational programmes were conducted to improve understanding of international guidelines and access to this information, which was the most important parameter during this project. A decreasing rate of CT scans for paediatric minor head injuries was demonstrated at the rate of 17%, achieving a reduction by more than 47% after the implementation of the interventions. Besides, misinformation and documentation deficits improved by more than 30%. Quality improvement methods decreased misinformation and improved access to information, which reduced errors in the indication of CT scans of the head in the paediatric age group and increased efficiency of patient care.

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Bordignon, Kelly C., and Walter Oleschko Arruda. "CT scan findings in mild head trauma: a series of 2,000 patients." Arquivos de Neuro-Psiquiatria 60, no. 2A (June 2002): 204–10. http://dx.doi.org/10.1590/s0004-282x2002000200004.

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The present study describes the cranial computed tomography (CT) scan findings of 2,000 cases of mild head trauma (HT) in Curitiba, Southern Brazil. The mean age of the entire series was 30.8 <FONT FACE=Symbol>±</FONT>19 years. The overall male to female ratio was 2:1. The most common causes of head injury were interpersonal aggression (17.9%), falls (17.4%), automobile accidents (16.2%), falls to the ground (13.1%) and pedestrian injuries (13 %). Alcohol intoxication was associated with HT in 158 cases (7.9%). A normal CT scan was seen in 60.75% (1215) and an abnormal CT scan in 39.25% (785) of patients. Out of 785 abnormal CT scan, 518(65.9%) lesions were related to HT. The most common CT scan HT related findings were: soft tissue swelling (8.9 %), skull fractures (4.3 %), intracranial and subgaleal hematomas (3.4% and 2.4 %), brain swelling (2 %) and brain contusion (1.2%). Out of 785 abnormal CT scans, 267 (34.1%) lesions were not related to head trauma. Incidental CT scan findings included brain atrophy (5.9%), one calcification (5.2%) several calcifications (2.4%) (probably neurocysticercosis in most cases), ischemic infarct (1.9%) and leukoaraiosis (1.3%). These findings showed the importance of CT scan examination in mild head injuries. Further studies to identify mild HT patients at higher risk of significant brain injury are warranted in order to optimize its use.

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Yunus, Muhamad, Alfi Wahyudi, Arti Febriyani H, and Rona Asla Romiza. "Karakteristik Hasil CT-Scan Kepala pada Penderita Cedera Kepala di Rumah Sakit Dr.H.Abdul Moeloek periode Januari – Desember Tahun 2018." ARTERI : Jurnal Ilmu Kesehatan 1, no. 3 (May 29, 2020): 177–83. http://dx.doi.org/10.37148/arteri.v1i3.56.

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Computerized Tomography (CT) -Scans examination are the main choice modalities in patients with acute head injuries because they are able to view the entire brain tissues and accurately distinguish the nature and presence of intracranial lesions and Extracranial. This study aim to determine the characteristics of results CT-Scan head on the patient's head injury at Dr.H.Abdul Moeloek Hospital January to December Period 2018. The research is a descriptive study with a crosssectional approach. The samples in this study were all records of medical head injury patients at Dr.H.Abdul Moeloek Hospital in January – December 2018 based on the formula Slovin as many as 182 respondents. The sampling techniques in the study used purposive sampling techniques. Data analysis using univariate analysis. From 182 respondents known prevalence of the age of the patient's head injury is 16-25 years as many as 82 respondents (45.1%), male gender 119 respondents (65.4%), a mild head injury of 105 respondents (57.7%). A normal CT-Scan overview of 99 respondents (54.4%) With a valid description (subarachnoid hemorrhage) as much as 25 respondents (13.7%). Characteristics of results CT-Scan head at the head injury sufferer of most ages 16-25 years, most male gender, most dominant mild head injuries and CT-Scan results most commonly present normal results with description SAH (subarachnoid hemorrhage).

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Foote, Robert L. "Oncology Scan – Head and Neck Cancers." International Journal of Radiation Oncology*Biology*Physics 83, no. 2 (June 2012): 477–79. http://dx.doi.org/10.1016/s0360-3016(12)00529-9.

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Dissertations / Theses on the topic "Scan head"

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Corbin, Max. "Surface fitting head scan data sets." Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175886726.

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Fang, Haian. "Optimal estimation of head scan data with generalized cross validation." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179344603.

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Hlahla, Mmachuene I. "Discrepancies between antemortem computed tomography scan and autopsy findings of traumatic intracranial haemorrrhage at Pietersburg Hospital forensic pathology Department." Thesis, University of Limpopo, 2019. http://hdl.handle.net/10386/3050.

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Thesis (MMED. (Forensic Medicine)) --University of Limpopo, 2019
Traumatic intracranial haemorrhages are common, carry a high mortality rate and are therefore commonly known in the practice of forensic pathology as unnatural deaths. Studies have demonstrated a significant decrease in mortality rate among patients who received surgical interventions compared to patients who were treated medically. Missed or mis-diagnoses, which may be apparent during an autopsy procedure, present possible missed treatment opportunities. Aim/objective and methods The study investigated the discrepancy rate and discrepancy pattern of diagnosis between antemortem brain computed tomography (CT) scan findings and autopsy findings in deceased patients with traumatic intracranial haemorrhage (TIH). A quantitative retrospective descriptive study was conducted based on bodies presented with TIH at Pietersburg Hospital Forensic Pathology Department. A total of consecutive 85 cases with antemortem CT (ACT) scan findings were compared to autopsy findings using percentage agreement and Cohen’s kappa statistics. Results and conclusion There was a fair overall agreement (k=0.38) with overall discrepancy rate of 24.74%, ranging from 9.41% to 34.12% for individual TIH between ACT scan and autopsy findings. Subarachnoid haemorrhage had the lowest agreement between the ACT scan and autopsy findings for TIH. Patient and doctor factors associated with the discrepancies were assessed. Those associated factors, if addressed, may have a positive impact on patient outcome. As far as the debate on non-invasive autopsy procedure is concerned, as a result of existing discrepancy rate, we conclude that ACT should not be used alone in the determination of cause of death but may be used in conjunction with autopsy findings.

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Karmazinová, Inna. "Automatické zarovnání CT skenu hlavy." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413110.

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The aim of this thesis is automatic alignment of head CT scan. Currently, the alignment is performed manually by an expert, however this process is time consuming. Therefore, methods for automatization of this process are being developed. Two algorithms for alignment in axial and coronal plane were designed based on bilateral symmetry of head. Following an algorithm for alignment in sagittal plane which uses CG-TOB reference line for rotation angle detection. Algorithms were implemented in MATLAB and tested and validated using a database of manually annotated head CT scans.

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Jedličková, Veronika. "Využití laserové skenovací hlavy pro povrchové kalení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443208.

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The diploma thesis addressed the issue of laser surface hardening using dynamic oscillation of the laser beam. The theoretical part presents the hardening technology and suitable using of laser equipments. The fiber laser YLS 2000 was used in the experiment and the hardened material was steel 12 050, which is suitable for laser hardening. The influence of two selected parameters of the scan head on the resulting structure and hardness of hardening layers was examined. Based on the results, the choice of optimal parameters for identical conditions with the experiment was recommended.

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Arbisser, Amelia M. "Multi-atlas segmentation in head and neck CT scans." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/76905.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 45-46).
We investigate automating the task of segmenting structures in head and neck CT scans, to minimize time spent on manual contouring of structures of interest. We focus on the brainstem and left and right parotids. To generate contours for an unlabeled image, we employ an atlas of labeled training images. We register each of these images to the unlabeled target image, transform their structures, and then use a weighted voting method for label fusion. Our registration method starts with multi-resolution translational alignment, then applies a relatively higher resolution affine alignment. We then employ a diffeomorphic demons registration to deform each atlas to the space of the target image. Our weighted voting method considers one structure at a time to determine for each voxel whether or not it belongs to the structure. The weight for a voxel's vote from each atlas depends on the intensity difference of the target and the transformed gray scale atlas image at that voxel, in addition to the distance of that voxel from the boundary of the structure. We evaluate the method on a dataset of sixteen labeled images, generating automatic segmentations for each using the other fifteen images as the atlas. We evaluated the weighted voting method and a majority voting method by comparing the resulting segmentations to the manual segmentations using a volume overlap metric and the distances between contours. Both methods produce accurate segmentations, our method producing contours with boundaries usually only a few millimeters away from the manual contour. This could save physicians considerable time, because they only have to make small modifications to the outline instead of contouring the entire structure.
by Amelia M. Arbisser.
M.Eng.

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Agostinelli, Andres Mateo. "PHENOTYPIC AND GENOTYPIC SELECTION FOR HEAD SCAB RESISTANCE IN WHEAT." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_theses/582.

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Fusarium Head Blight (FHB) is a destructive disease caused by Fusarium graminearum that affects wheat (Triticum aestivum L.) worldwide. Breeding for resistance to FHB is arguably the best way to combat this disease. However, FHB resistance is highly complex and phenotypic screening is difficult. Molecular markers are a promising tool but breeding programs face the challenge of allocating resources in such a way that the optimum balance between phenotypic and genotypic selection is reached. An F2:3 population derived from a resistant x susceptible cross was subjected to phenotypic and genotypic selection. For phenotyping, a novel air separation method was used to measure percentage of damaged kernels (FDK). Heritability estimates were remarkably high, which was attributed to the type of cross and the quality of phenotyping. Genotypic selection was done by selecting resistance alleles at quantitative trait loci (QTL) on the 3BS (Fhb1) and the 2DL chromosomes. Fhb1 conferred a moderate but stable FHB resistance while the 2DL QTL conferred a surprisingly high level of resistance but with significant interaction with the environment. Phenotypic selection conferred higher or lower genetic gains than genotypic selection, depending on the selection intensity. Based on these results, different selection strategies are discussed.

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Hornung, Maximilian. "Deep Learning-Based Identification of Ischemic Regions in Native Head CT Scans." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-272129.

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Stroke is one of the major causes of death and disability worldwide. Fast diagnosis is of critical importance for stroke treatment. In clinical routine, a non-contrast CT (NCCT) is typically acquired immediately to determine whether the stroke is ischemic or hemorrhagic and plan therapy accordingly. In case of ischemia, early signs of infarction may appear due to increased water uptake. These signs may be subtle, especially if observed only shortly after symptom onset, but hold the potential to provide a crucial first assessment of the location and extent of the infarction. In this paper, we train a deep neural network to predict the infarct core from NCCT in an image-to-image fashion. To facilitate exploitation of anatomic correspondences, learning is carried out in the standardized coordinate system of a brain atlas to which all images are deformably registered. Apart from binary infarct core masks, perfusion maps such as cerebral blood volume and flow are employed as additional training targets to enrich the physiologic information available to the model. The method is evaluated using cross validation on the training data set consisting of 141 cases. For validation, we measure the overlap with the ground truth masks, the localisation performance and the agreement with both manual and automatic assessment of affected ASPECTS regions. It is shown that the additional targets improve the results signficantly, achieving an area-under-curve of 0.835 when compared with the automated assessment in ASPECTS region classification and providing a distance of 0 mm between the prediction maximum and the indicated stroke infarct core in the majority of severe strokes with an infarct core volume greater than 70 ml.
Stroke är en av de viktigaste orsakerna till dödsfall och funktionshinder över hela världen. Snabb diagnos är av avgörande betydelse för strokebehandling. I klinisk rutin utförs en datortomografi utan kontrastmedel omedelbart för att bestämma om en stroke är ischemisk eller hemorragisk och terapi planeras baserat på resultatet. I händelse av en ischemisk stroke kan tidiga tecken på infarkt uppstå på grund av ökat vattenupptag. Dessa tecken kan vara subtila, särskilt om de bara observeras strax efter symptomen börjat, men har potential att ge en avgörande första bedömning av infarktens plats och omfattning. I detta projekt tränar vi ett djupt neuralt nätverk för att förutsäga infarktkärnan från datortomografibilder på ett bild-till-bild-sätt. För att underlätta utnyttjandet av anatomiska korrespondenser genomförs lärandet i det standardiserade koordinatsystemet i en hjärnatlas i vilken alla bilder är deformerbart registrerade. Förutom binära infarktkärnmasker, används erfusionskartor såsom cerebral blodvolym och flöde som ytterligare träningsmål. Därmed finns mer fysiologisk information som det neurala nätverket kan tränas på. Metoden utvärderas med hjälp av korsvalidering på träningsdatauppsättningen bestående av 141 patienter. För validering mäter vi överlappningen med de observerade maskerna, lokaliseringens kvalitet och utvärdering med både manuell och automatisk bedömning av berörda ASPECTS-regioner. Det visas att de ytterligare målen förbättrar resultaten betydande och uppnår en area-under-kurva på 0,835 jämfört med automatisk bedömning av klassifikationen av ASPECTS-regioner och ger ett avstånd av 0 mm mellan förutsägelsen maximalt och strokeinfarktkärnan i majoriteten av allvarliga fall av stroke med en infarktkärnvolym större än 70 ml.

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Woch, Katherine. "Use of the Polaris Vicra for monitoring subject head movement during neurological PET scans." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18453.

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Head motion is a significant source of image quality degradation in neurological PET scans. It is especially detrimental in PET scanners with high resolution, specifically the HRRT (High Resolution Research Tomograph) with a spatial resolution of approximately 2.5 mm. Head restraints are often used to minimize subject movement and subject comfort is essential to obtain reliable data. We have investigated subject movement during long scans (over an hour) and subject repositioning accuracy for a series of scans. The Polaris Vicra is a commercially available optical measurement device we used to measure the position and orientation of the subject's head over the course of the scan. A tracking tool was attached to a swim cap worn by the subject and tracked relative to a second tool attached to the scanner gantry. The head is a body part that can be treated as a rigid body. For rigid bodies, movement detected at the surface can be directly translated to any point in that body. We have used this principle and the Polaris Vicra's movement data to track several ROIs in subject's brains. We found that over the course of a long scan, ROIs placed near the occipital pole can move as much as 14 mm. This will cause significant blurring in images taken with the HRRT. The repositioning device tested was very accurate and repositioned the subject within 2 mm of her initial position.
Les mouvements de la tête sont une source significative de dégradation de la qualité de l'image provenant de PET scans. Ils jouent un rôle particulièrement négatif avec les scanners PET à haute définition comme le HHRT (High Resolution Research Tomograph) qui possède une résolution approximative de 2,5 mm. Différents outils de stabilisation de la tête sont souvent utilisés afin de minimiser les mouvements, et le confort du sujet est essentiel pour obtenir des résultats fiables. Nous avons testé les mouvements du sujet au cours de longs scans (plus d'une heure) ainsi que la précision du repositionnement du sujet lors d'une série de scans. Le Polaris Vicra est un instrument de mesure optique disponible sur le marché que nous avons utilisé pour mesurer la position et l'orientation de la tête du sujet durant le scan. Un outil mesurant les mouvements de la tête relativement au scanner a été attaché à un bonnet de bain déposé sur la tête du sujet. La tête peut être considérée comme un corps rigide. Pour les corps rigides, un mouvement détecté à la surface est directement relié au mouvement de n'importe quel point sur ce corps. Nous avons utilié ce principe ainsi que les données de mouvement du Polaris Vicra afin de dépister plusieurs régions d'intérêts dans le cerveau du sujet. Nous démontrons que durant un long scan, les régions d'intérêts situés près du pôle occipital peuvent se déplacer sur près de 12 mm. Ceci peut donc rendre l'image floue. L'outil de repositionnement testé s'est avéré très précis et a repositionné le sujet en deçà de 2 mm de sa position initiale.

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Khaeim, Hussein M. "MASS SELECTION WITH AN OPTICAL SORTER FOR HEAD SCAB RESISTANCE IN SOFT RED WINTER WHEAT." UKnowledge, 2013. http://uknowledge.uky.edu/pss_etds/32.

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Fusarium head blight (FHB) or head scab, caused by Fusarium graminearum Schwabe [telomorph: Gibberella zeae Schwein.(Petch)], is one of the most destructive diseases of wheat (Triticum aestivum L.) worldwide. Numerous strategies for scab resistance breeding are in use, including phenotypic selection for low severity and marker-assisted selection for resistance QTL. The most destructive consequences of scab are evidenced through a reduction in grain quality, and the presence of mycotoxins, the most common of which is deoxynivalenol (DON). Thus, there is great interest among breeders in selecting for resistance to both of these traits. To this end, a study was devised as follows. In 2010, 20 bulk F3 SRW wheat populations with scab resistant parents in their pedigrees were harvested by population from unreplicated plots near Lexington, KY. The plots were affected by a naturally occurring mild-moderate scab epidemic. The grain was sorted on a USDA/ARS and National Manufacturing Seed Sorter System with color camera according to a calibration that reflected visual differences between asymptomatic grain and grain showing FHB symptoms. This process was repeated in 2011 using grain from plots that had conidial suspension applied at anthesis. In 2012, an unreplicated plot study of the C0, C1 and C2 cycles of selection, inoculated with grain spawn and conidial suspension, was evaluated for Fusarium damaged kernels (FDK) and DON concentration. An additional cycle of selection was conducted by running the bulk grain through the sorter. In October 2012, 4 selection cycles of the 20 populations were planted in a RCB experiment at Lexington and Princeton, KY. Bulk populations were planted in both scab nursery and plots, and C3 accepted and rejected of all populations and derived lines of 2 populations were planted in the scab nursery in Lexington, KY. Some populations had FDK and DON reduction with selection, and some derived lines had either numerical or significant reduction with selection. Although the accepted fraction had non-significant reduction compared with the rejected fraction over the populations, FDK and DON means were obviously lower in accepted than in rejected fractions.

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Books on the topic "Scan head"

1

Z, Grahovac Stephen, ed. Emergency CT scans of the head: A practical atlas. St. Louis: Mosby, 1998.

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2

Dinges, John. Our man in Panama: How general Noriega fooled the U.S. and made millions in Central America's drug & arms scan. N.Y: Random House, 1989.

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3

International Symposium on Scientific Computing, Computer Arithmetic, and Validated Numerics (4th 1995 Wuppertal, Germany). Scientific computing and validated numerics: Proceedings of the International Symposium on Scientific Computing, Computer Arithmetic, and Validated Numerics, SCAN-95, held in Wuppertal, Germany, September 26-29, 1995. Berlin: Akademie Verlag, 1996.

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Gillespie, Stuart. How nutrition improves: A report based on an ACC/SCN Workshop held on 25-27 September 1993 at the 15th IUNS International Congress on Nutrition, Adelaide, Australia. Geneva, Switzerland: ACC/SCN c/o World Health Organization, 1996.

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Papers from the Scientific Committee for Antarctic Research (SCAR) Symposium on the International Trans-Antarctic Scientific Expedition (ITASE) and Ice Sheet Mass Balance and Sea Level (ISMASS), held in Bremen, Germany, 28-29 July, 2004. Cambridge, UK: International Glaciological Society, 2005.

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6

A, Austin S., American Concrete Institute, and Sprayed Concrete Association, eds. Sprayed concrete technology: The proceedings of the ACI/SCA International Conference on Sprayed Concrete/Shotcrete, "Sprayed concrete technology for the 21st century" held at Edinburgh University from 10th to 11th September 1996. London: E&FN Spon, 1996.

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7

Lee, Christoph I. Computed Tomography for Minor Head Injury. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190223700.003.0001.

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This chapter, found in the headache section of the book, provides a succinct synopsis of a key study examining the use of computed tomography (CT) scans for minor head injury using the New Orleans criteria. This summary outlines the study methodology and design, major results, limitations and criticisms, related studies and additional information, and clinical implications. The study showed that head CT scans for patients with minor head injury can be safely limited to those presenting with at least 1 of 7 specific clinical findings. In addition to outlining the most salient features of the study, a clinical vignette and imaging example are included in order to provide relevant clinical context.

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8

Albertyn, Lynda E. Albertyn, and Linda E. Albertyn. Interpreting CT Head Scans: A Basic Guide to Image Analysis. W.B. Saunders Company, 1996.

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9

Hochman, Michael E. Identifying Children with Low-Risk Head Injuries Who Do Not Require Computed Tomography. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190223700.003.0002.

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Abstract:

This chapter, found in the headache section of the book, provides a succinct synopsis of a key study examining the use of computed tomography (CT) scans for children with low-risk head injuries. This summary outlines the study methodology and design, major results, limitations and criticisms, related studies and additional information, and clinical implications. This study derived and validated prediction rules that can accurately identify children at very low risk for ci-TBI; the authors provide several guidelines for applying these rules depending on the severity of predictive features, patient history, and clinician’s judgment. In addition to outlining the most salient features of the study, a clinical vignette and imaging example are included in order to provide relevant clinical context.

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10

School Curriculum and Assessment Authority. and International Conference on the Place of Modern Foreign Languages in the Primary Curriculum (1996), eds. Modern foreign languages in the primary curriculum: An international conference held by SCAA in October 1996. London: SCAA, 1997.

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Book chapters on the topic "Scan head"

1

Bahk, Yong-Whee. "Dual-Head Pinhole Scan, Pinhole SPECT, and Gamma Correction Scan." In Combined Scintigraphic and Radiographic Diagnosis of Bone and Joint Diseases, 13–27. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-2759-8_2.

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2

Skabek, Krzysztof, and Dawid Łapczynski. "Reconstruction of Head Surface Model from Single Scan." In Proceedings of the 8th International Conference on Computer Recognition Systems CORES 2013, 469–78. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00969-8_46.

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Feldman, Z., C. S. Robertson, Ch F. Contant, R. K. Narayan, and R. G. Grossman. "CT Scan Predictors of Intracranial Hypertension After Head Injury." In Intracranial Pressure VIII, 491–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-77789-9_105.

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4

Ukar, E., S. Martínez, A. Lamikiz, and I. Tabernero. "2D Scan-Head Motion Characterization and Machine-Tool Integration." In New Advances in Mechanisms, Transmissions and Applications, 277–84. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7485-8_34.

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5

Meinig, G., P. Ulrich, U. Prohl, and J. Richter. "ICP, nrCBF, and Contrast Scan for the Prognosis of Severe Head Injury." In Advances in Neurosurgery, 87–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74279-8_15.

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Ogawa, T., H. Sekino, M. Uzura, T. Sakamoto, Y. Taguchi, Y. Yamaguchi, T. Hayashi, I. Yamanaka, N. Oohama, and S. Imaki. "Comparative Study of Magnetic Resonance and CT Scan Imaging in Cases of Severe Head Injury." In Neurotraumatology: Progress and Perspectives, 8–10. Vienna: Springer Vienna, 1992. http://dx.doi.org/10.1007/978-3-7091-9233-7_3.

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7

Uzzell, B. P., W. D. Obrist, C. A. Dolinskas, and J. L. Jaggi. "Correlation of Acute ICP and CBF with CT Scan and Neuropsychological Recovery in Severe Head Injury." In Intracranial Pressure VI, 687–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70971-5_131.

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8

Okada, Yoshikazu, Takeshi Shima, Masahiro Nishida, Kanji Yamane, Shinji Okita, and Akira Yoshida. "Comparison of MRI and X-ray CT Scan Findings in Patients with Serious Neurological Deficits Due to Head Injury." In Recent Advances in Neurotraumatology, 184–87. Tokyo: Springer Japan, 1993. http://dx.doi.org/10.1007/978-4-431-68231-8_41.

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9

Igbaseimokumo, Usiakimi. "Head Injury." In Brain CT Scans in Clinical Practice, 23–41. London: Springer London, 2009. http://dx.doi.org/10.1007/b98343_2.

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10

Bullock, R., G. Blake, M. du Trevou, and J. Favier. "The Value of CT Scan Density Measurements After Human Head Injury: A Comparative Study Using Microgravimetric Measurement of Brain Specific Gravity." In Intracranial Pressure VI, 20–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70971-5_4.

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Conference papers on the topic "Scan head"

1

Nurre, Joseph H. "Processing three-dimensional human head scan data." In IS&T/SPIE's Symposium on Electronic Imaging: Science & Technology, edited by Georges G. Grinstein and Robert F. Erbacher. SPIE, 1995. http://dx.doi.org/10.1117/12.205978.

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2

Fang, Haian, and Joseph H. Nurre. "Smoothing head scan data with generalized cross validation." In Optical Tools for Manufacturing and Advanced Automation, edited by Sabry F. El-Hakim. SPIE, 1993. http://dx.doi.org/10.1117/12.162128.

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3

Li, Peng, Brian D. Corner, and Steven Paquette. "Automatic landmark extraction from three-dimensional head scan data." In Electronic Imaging 2002, edited by Brian D. Corner, Roy P. Pargas, and Joseph H. Nurre. SPIE, 2002. http://dx.doi.org/10.1117/12.460170.

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Nurre, Joseph H., and Max D. Corbin. "Tailoring surface fit to 3D human head scan data." In Electronic Imaging: Science & Technology, edited by Georges G. Grinstein and Robert F. Erbacher. SPIE, 1996. http://dx.doi.org/10.1117/12.234685.

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5

Li, Peng, Brian D. Corner, and Steven Paquette. "Automatic reconstruction of the top of the head from Cyberware PS head scan data." In Photonics West 2001 - Electronic Imaging, edited by Brian D. Corner, Joseph H. Nurre, and Roy P. Pargas. SPIE, 2001. http://dx.doi.org/10.1117/12.424904.

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6

Ukar, E., I. Tabernero, F. Liebana, I. Saitua, R. Villaseca, and J. Sobrado. "Parameter study on laser surface finishing with 2D scan head." In THE 4TH MANUFACTURING ENGINEERING SOCIETY INTERNATIONAL CONFERENCE (MESIC 2011). AIP, 2012. http://dx.doi.org/10.1063/1.4707611.

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7

Liu, Xiaoming, Pavan Annangi, Mithun Gupta, Bing Yu, Dirk Padfield, Jyotirmoy Banerjee, and Kajoli Krishnan. "Learning-based scan plane identification from fetal head ultrasound images." In SPIE Medical Imaging, edited by Johan G. Bosch and Marvin M. Doyley. SPIE, 2012. http://dx.doi.org/10.1117/12.911516.

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8

Mostayed, Ahmed, Sikyung Kim, Mohammad Mynuddin Gani Mazumder, and Se Jin Park. "Face Recognition Using 3D Head Scan Data Based on Procrustes Distance." In 2008 International Conference on Intelligent Engineering Systems. IEEE, 2008. http://dx.doi.org/10.1109/ines.2008.4481295.

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9

Fang, Haian, and Joseph H. Nurre. "Optimal smoothing of three-dimensional head scan data by cross validation." In Photonics for Industrial Applications, edited by Sabry F. El-Hakim. SPIE, 1994. http://dx.doi.org/10.1117/12.189140.

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10

Hsieh, Bao-Yu, Sung-Liang Chen, Tao Ling, L. Jay Guo, and Pai-Chi Li. "Design and fabrication of an integrated intravascular ultrasound/photoacoustic scan head." In BiOS, edited by Alexander A. Oraevsky and Lihong V. Wang. SPIE, 2010. http://dx.doi.org/10.1117/12.843614.

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Reports on the topic "Scan head"

1

Friskop, Andrew, Kiersten Wise, Carl Bradley, Damon Smith, Nathan Kleczewski, Heather Darby, Hillary Mehl, and Alyssa Collins. Optimizing Fungicide Use for Fusarium Head Blight (Scab) and Associated Mycotoxins. United States: Crop Protection Netework, February 2018. http://dx.doi.org/10.31274/cpn-20190620-032.

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2

Predicting severe brain injuries from apparent minor head trauma without a scan. National Institute for Health Research, March 2016. http://dx.doi.org/10.3310/signal-000208.

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3

A scan may help decide if surgery is required as follow-on treatment for head and neck cancer. National Institute for Health Research, June 2016. http://dx.doi.org/10.3310/signal-000250.

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