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Статті в журналах з теми "Virtual tomography"

Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Virtual tomography.

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Sutton, Mark, Imran Rahman, and Russell Garwood. "VIRTUAL PALEONTOLOGY—AN OVERVIEW." Paleontological Society Papers 22 (September 2016): 1–20. http://dx.doi.org/10.1017/scs.2017.5.

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AbstractVirtual paleontology is the study of fossils through three-dimensional digital visualizations; it represents a powerful and well-established set of tools for the analysis and dissemination of fossil data. Techniques are divisible into tomographic (i.e., slice-based) and surface-based types. Tomography has a long predigital history, but the recent explosion of virtual paleontology has resulted primarily from developments in X-ray computed tomography (CT), and of surface-based technologies (e.g., laser scanning). Destructive tomographic methods include forms of physical-optical tomography (e.g., serial grinding); these are powerful but problematic techniques. Focused Ion Beam (FIB) tomography is a modern alternative for microfossils; it is also destructive but is capable of extremely high resolutions. Nondestructive tomographic methods include the many forms of CT, which are the most widely used data-capture techniques at present, but are not universally applicable. Where CT is inappropriate, other nondestructive technologies (e.g., neutron tomography, magnetic resonance imaging, optical tomography) can prove suitable. Surface-based methods provide portable and convenient data capture for surface topography and texture, and might be appropriate when internal morphology is not of interest; technologies include laser scanning, photogrammetry, and mechanical digitization. Reconstruction methods that produce visualizations from raw data are many and various; selection of an appropriate workflow will depend on many factors, but is an important consideration that should be addressed prior to any study. The vast majority of three-dimensional fossils can now be studied using some form of virtual paleontology, and barriers to broader adaptation are being eroded. Technical issues regarding data sharing remain problematic. Technological developments continue; those promising tomographic recovery of compositional data are of particular relevance to paleontology.

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2

Seuss, Hannes, Rolf Janka, Matthias Hammon, Alexander Cavallaro, Michael Uder, and Peter Dankerl. "Virtual Computed Tomography Colonography." Academic Radiology 25, no. 8 (August 2018): 1046–51. http://dx.doi.org/10.1016/j.acra.2017.12.014.

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3

Buckler, Andrew J., Eva Karlöf, Mariette Lengquist, T. Christian Gasser, Lars Maegdefessel, Ljubica Perisic Matic, and Ulf Hedin. "Virtual Transcriptomics." Arteriosclerosis, Thrombosis, and Vascular Biology 41, no. 5 (May 5, 2021): 1738–50. http://dx.doi.org/10.1161/atvbaha.121.315969.

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Objective: Therapeutic advancements in atherosclerotic cardiovascular disease have improved prevention of ischemic stroke and myocardial infarction, but diagnostic methods for atherosclerotic plaque phenotyping to aid individualized therapy are lacking. In this feasibility study, we aimed to elucidate plaque biology by decoding the molecular phenotype of plaques through analysis of computed-tomography angiography images, making a predictive model for plaque biology referred to as virtual transcriptomics. Approach and Results: We employed machine intelligence using paired computed-tomography angiography and transcriptomics from carotid endarterectomies of 40 patients undergoing stroke-preventive surgery for carotid stenosis. Computed tomography angiographies were analyzed with novel software for accurate characterization of plaque morphology and plaque transcriptomes obtained from microarrays, followed by mathematical modeling for prediction of molecular signatures. Four hundred fourteen coding and noncoding RNAs were robustly predicted using supervised models to estimate gene expression based on plaque morphology. Examples of predicted transcripts included ion transporters, cytokine receptors, and a number of microRNAs whereas pathway analyses demonstrated enrichment of several biological processes relevant for the pathophysiology of atherosclerosis and plaque instability. Finally, the ability of the models to predict plaque gene expression was demonstrated using computed tomography angiographies from 4 sequestered patients and comparisons with transcriptomes of corresponding lesions. Conclusions: The results of this pilot study show that atherosclerotic plaque phenotyping by image analysis of conventional computed-tomography angiography can elucidate the molecular signature of atherosclerotic lesions in a multiscale setting. The study holds promise for optimized personalized therapy in the prevention of myocardial infarction and ischemic stroke, which warrants further investigations in larger cohorts.

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4

Li, Y., and W. Q. Yang. "Virtual electrical capacitance tomography sensor." Journal of Physics: Conference Series 15 (January 1, 2005): 183–88. http://dx.doi.org/10.1088/1742-6596/15/1/031.

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5

Mendelson, Richard M., and Geoffrey M. Forbes. "Computed tomography colonography (virtual colonoscopy): Review." Australasian Radiology 46, no. 1 (March 2002): 1–12. http://dx.doi.org/10.1046/j.1440-1673.2001.00988.x.

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6

Wichmann, Julian L., Eva-Maria Nöske, Johannes Kraft, Iris Burck, Jens Wagenblast, Anne Eckardt, Claudia Frellesen, et al. "Virtual Monoenergetic Dual-Energy Computed Tomography." Investigative Radiology 49, no. 11 (November 2014): 735–41. http://dx.doi.org/10.1097/rli.0000000000000077.

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7

Carrascosa, Patricia, Carlos Capuñay, Baronio Mariano, Elba Martín López, Carrascosa Jorge, Mario Borghi, Carlos Sueldo, and Sergio Papier. "Virtual hysteroscopy by multidetector computed tomography." Abdominal Imaging 33, no. 4 (July 10, 2007): 381–87. http://dx.doi.org/10.1007/s00261-007-9270-9.

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8

Delvecchio, Fernando C., Brian K. Auge, Alon Z. Weizer, Ricardo M. Brizuela, Ari D. Silverstein, Paul K. Pietrow, Joan P. Heneghan, and Glenn M. Preminger. "Computed tomography urography, three-dimensional computed tomography and virtual endoscopy." Current Opinion in Urology 12, no. 2 (March 2002): 137–42. http://dx.doi.org/10.1097/00042307-200203000-00010.

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9

Amelina, Inna D., Lev N. Shevkunov, Aleksey M. Karachun, Alexander E. Mikhnin, and Denis V. Nesterov. "Diagnosis and t-staging of gastric cancer: comparison of standard computed tomography and computed-tomographic pneumogastrography." Bulletin of the Russian Military Medical Academy 23, no. 2 (July 12, 2021): 99–106. http://dx.doi.org/10.17816/brmma70384.

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The advantages of computed tomographic pneumogastrography with the possibility of three-dimensional visualization and virtual gastroscopy in diagnosing gastric cancer are considered. The study included 479 patients with histologically diagnosed gastric cancer who were treated at the National Medical Research Center of Oncology named after N.N. Petrov from 2011 to 2018. 232 patients received preoperative chemotherapy. All patients underwent surgery: 70 in the volume of endoscopic dissection, 40 proximal subtotal resection, 166 distal subtotal resection, 203 gastrectomy. All patients at the preoperative stage underwent staging computed tomography on a 64-slice X-ray computed tomograph: 208 patients underwent computed tomography according to the standard protocol without targeted preparation of the stomach for the study, 271 patients with targeted preparation of the stomach for the study according to the computed tomographic pneumogastrography protocol. The sensitivity of the computed tomography in assessing the T-stage was assessed by comparison with pathomorphological data. Of the 208 patients who underwent computed tomography according to the standard protocol, a gastric cancer was detected in 111 (53.4%), out of 271 patients who underwent computed tomography pneumogastrography, a gastric cancer was detected in 267 (98.52%), which is a statistically significant difference in comparing computed tomography methods (Pearson, 144.223, df = 1; p 0.001). There are statistically significant differences when comparing computed tomography according to the standard protocol and computed tomographic pneumogastrography in detecting gastric cancer for all tumor categories: T/yT1 8.2 and 94.4% (Pearson, 99.205, df = 1; p 0.001), T/yT2 47.8 and 100% (Pearson, 24.681, df = 1; p 0.001), T/yT3 72.3 and 100% (Pearson, 33.114, df = 1; p 0.001), T/yT4 90.0 and 100% (Pearson, 4.789, df = 1; p = 0.029) respectively. There are also statistically significant differences when comparing the sensitivity of computed tomography according to the standard protocol and computed tomographic pneumogastrography in determining tumor invasion for all tumor categories: T/yT1 0 and 69.4% (Pearson, 67.880, df = 1; p 0.001), T/yT2 26.1 and 71.1% (Pearson, 11.666, df = 1; p 0.001), T/yT3 32.9 and 84.6% (Pearson, 54.900, df = 1; p 0.001), T/yT4 73.3 and 95.7% (Pearson, 7.916, df = 1; p = 0.005) respectively. In general, the sensitivity of the computed tomography according to the standard protocol for determining the T-stage of gastric cancer was 28.4%, computed tomographic pneumogastrography 77.1% (Pearson, 113.505, df = 1; p 0.001). Computed tomographic pneumogastrography with the possibility of three-dimensional visualization and virtual gastroscopy significantly increases the indicators of the effectiveness of diagnosing gastric cancer both early forms (category T1) and with deeper invasion (categories T2T4), demonstrates high sensitivity in determining T/yT-stages.

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10

Sato, Masaaki, Kazuhiro Nagayama, Hideki Kuwano, Jun-ichi Nitadori, Masaki Anraku, and Jun Nakajima. "Role of post-mapping computed tomography in virtual-assisted lung mapping." Asian Cardiovascular and Thoracic Annals 25, no. 2 (January 11, 2017): 123–30. http://dx.doi.org/10.1177/0218492316689351.

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Background Virtual-assisted lung mapping is a novel bronchoscopic preoperative lung marking technique in which virtual bronchoscopy is used to predict the locations of multiple dye markings. Post-mapping computed tomography is performed to confirm the locations of the actual markings. This study aimed to examine the accuracy of marking locations predicted by virtual bronchoscopy and elucidate the role of post-mapping computed tomography. Methods Automated and manual virtual bronchoscopy was used to predict marking locations. After bronchoscopic dye marking under local anesthesia, computed tomography was performed to confirm the actual marking locations before surgery. Discrepancies between marking locations predicted by the different methods and the actual markings were examined on computed tomography images. Forty-three markings in 11 patients were analyzed. Results The average difference between the predicted and actual marking locations was 30 mm. There was no significant difference between the latest version of the automated virtual bronchoscopy system (30.7 ± 17.2 mm) and manual virtual bronchoscopy (29.8 ± 19.1 mm). The difference was significantly greater in the upper vs. lower lobes (37.1 ± 20.1 vs. 23.0 ± 6.8 mm, for automated virtual bronchoscopy; p < 0.01). Despite this discrepancy, all targeted lesions were successfully resected using 3-dimensional image guidance based on post-mapping computed tomography reflecting the actual marking locations. Conclusions Markings predicted by virtual bronchoscopy were dislocated from the actual markings by an average of 3 cm. However, surgery was accurately performed using post-mapping computed tomography guidance, demonstrating the indispensable role of post-mapping computed tomography in virtual-assisted lung mapping.

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11

Calin, Daniel Cosmin, Dragos Laurentiu Popa, and Alexandru Florian Grecu. "Virtual Experimental Analyzes of the Normal and Arthrotic Hip." Applied Mechanics and Materials 896 (February 2020): 3–14. http://dx.doi.org/10.4028/www.scientific.net/amm.896.3.

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The hip joint is spheroidal type which allows three movement axes, with a special importance in statics and locomotion. The study of the hip joint by computerized tomography of a male, 52-year-old male patient at the Craiova County Emergency Clinical Hospital was started using Siemens equipment comprised of a magnetic resonance device and a computed tomography apparatus. Were analyzed: hip joint with the two main components of the femur and pelvic bones. To obtain the virtual components of the hip joint, 143 tomographic images from different planes were analyzed. CT images were used to define the normal hip joint. Also, the arthrotic hip virtual model was generated. These two virtual models were subjected to normal walking load and were simulated by the finite element method. The results were analyzed and compared, and important conclusions were finally drawn.

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12

Arslan, Halil, Kadir Ceylan, Mustafa Harman, Yuksel Yilmaz, Osman Temizoz, and Saban Can. "Virtual computed tomography cystoscopy in bladder pathologies." International braz j urol 32, no. 2 (April 2006): 147–54. http://dx.doi.org/10.1590/s1677-55382006000200004.

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13

Xu, Sun, Lu Wei, Zhao Dianhui, Gen Daoying, Shen Tianzhen, and Chen Xingrong. "Clinical application of computed tomography virtual colography." Chinese Journal of Digestive Diseases 2, no. 2 (April 2001): 74–77. http://dx.doi.org/10.1046/j.1443-9573.2001.00034.x.

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14

Schroeder, S. "Virtual coronary angioscopy using multislice computed tomography." Heart 87, no. 3 (March 1, 2002): 205–9. http://dx.doi.org/10.1136/heart.87.3.205.

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15

Spinzi, Giancarlo, Alberto Martegani, Gianmarco Belloni, Vittorio Terruzzi, Carlo Del Favero, and Giorgio Minoli. "Computed tomography–virtual cholangiography and choledochal cyst." Gastrointestinal Endoscopy 50, no. 6 (December 1999): 857–59. http://dx.doi.org/10.1016/s0016-5107(99)70177-x.

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16

Giannakidis, Archontis, Leonidas Kotoulas, and Maria Petrou. "Virtual sensors for 2D vector field tomography." Journal of the Optical Society of America A 27, no. 6 (May 14, 2010): 1331. http://dx.doi.org/10.1364/josaa.27.001331.

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17

Ichikawa, Katsuhiro. "9. Virtual Monochromatic X-ray Computed Tomography." Japanese Journal of Radiological Technology 76, no. 2 (2020): 237–41. http://dx.doi.org/10.6009/jjrt.2020_jsrt_76.2.237.

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18

Ji, Xiangdong. "Proton tomography through deeply virtual Compton scattering." National Science Review 4, no. 2 (March 1, 2017): 213–23. http://dx.doi.org/10.1093/nsr/nwx024.

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Abstract In this prize talk, I recall some of the history surrounding the discovery of deeply virtual Compton scattering, and explain why it is an exciting experimental tool to obtain novel tomographic pictures of the nucleons at Jefferson Lab 12 GeV facility and the planned Electron-Ion Collider in the USA. It is certainly a great honor to have received the 2016 Herman Feshbach Prize in theoretical nuclear physics by the American Physical Society. I sincerely thank my colleagues in the Division of Nuclear Physics to recognize the importance of some of the theoretical works I have done in the past, particularly their relevance to the experimental programs around the world.

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19

Springer, P., A. Dessl, S. M. Giacomuzzi, W. Buchberger, A. Stöger, M. Oberwalder, and W. Jaschke. "Virtual Computed Tomography Gastroscopy: A New Technique." Endoscopy 29, no. 07 (September 1997): 632–34. http://dx.doi.org/10.1055/s-2007-1004269.

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20

S, Dr Renjini. "Computerized Tomography Virtual Bronchoscopy – Will it replace Fibre optic Bronchoscopy in Tracheobronchial Evaluation?" Journal of Medical Science And clinical Research 05, no. 04 (April 27, 2017): 20812–16. http://dx.doi.org/10.18535/jmscr/v5i4.174.

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21

Liu, Ning, Cuixia Dai, Yuanhe Tang, and Peng Xi. "Virtual-OCT: A simulated optical coherence tomography instrument." Journal of Innovative Optical Health Sciences 07, no. 05 (September 2014): 1450030. http://dx.doi.org/10.1142/s1793545814500308.

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We report the virtual instrumentation of both time-domain (TD) and spectral-domain (SD) optical coherence tomography (OCT) systems. With a virtual partial coherence source from either a simulated or measured spectrum, the OCT signals of both A-scan and B-scan were demonstrated. The spectrometric detector's pixel number, dynamic range, noise, as well as spectral resolution can be simulated in the virtual spectral domain (SD-OCT). The virtual-OCT system provides an environment for parameter evaluation and algorithm optimization for experimental OCT instrumentation, and promotes the understanding of OCT imaging and signal post-processing processes.

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22

Bhat, K. V., J. S. Hegde, U. S. Nagalotimath, and G. C. Patil. "Evaluation of computed tomography virtual bronchoscopy in paediatric tracheobronchial foreign body aspiration." Journal of Laryngology & Otology 124, no. 8 (April 29, 2010): 875–79. http://dx.doi.org/10.1017/s0022215110000769.

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AbstractObjective:Virtual bronchoscopy is a noninvasive technique which provides an intraluminal view of the tracheobronchial tree. This study aimed to evaluate this technique in comparison with rigid bronchoscopy, in paediatric patients with tracheobronchial foreign bodies undetected by plain chest radiography.Methods:Plain chest radiography was initially performed in 40 children with suspected foreign body aspiration. Computed tomography virtual bronchoscopy was performed in the 20 in whom chest radiography appeared normal. Virtual bronchoscopic images were obtained. All patients underwent rigid bronchoscopy performed by an otolaryngologist blinded to the computed tomography virtual bronchoscopy findings, within 24 hours. Virtual bronchoscopic findings were then compared with the results of rigid bronchoscopy.Results:In 12 patients, foreign bodies detected by virtual bronchoscopy were confirmed by rigid bronchoscopy. In one case, a mucous plug was perceived as a foreign body on virtual bronchoscopy. In another case, a minute foreign body was missed on virtual bronchoscopy. The following parameters were calculated: sensitivity, 92.3 per cent; specificity, 85.7 per cent; validity, 90 per cent; positive likelihood ratio, 6.45; and negative likelihood ratio, 0.089.Conclusion:In the presence of a positive clinical diagnosis and negative chest radiography, computed tomography virtual bronchoscopy must be considered in all cases of tracheobronchial foreign body aspiration, in order to avoid needless rigid bronchoscopy. Computed tomography virtual bronchoscopy is particularly useful in screening cases of occult foreign body aspiration, as it has high sensitivity, specificity and validity.

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23

Das, K. M., Hani Lababidi, Sadeq Al Dandan, Shanker Raja, Hussam Sakkijha, Mohammad Al Zoum, Khalid AlDosari, and Sven G. Larsson. "Computed Tomography Virtual Bronchoscopy: Normal Variants, Pitfalls, and Spectrum of Common and Rare Pathology." Canadian Association of Radiologists Journal 66, no. 1 (February 2015): 58–70. http://dx.doi.org/10.1016/j.carj.2013.10.002.

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A broad spectrum of pathologies that involve the laryngotracheobronchial airway and imaging plays a crucial role in evaluating these abnormalities. Computed tomography with virtual bronchoscopy has been found to be very helpful in defining the location, extent, and nature of these lesions, and is increasingly being used even in patients with contraindications for fiberoptic bronchoscopy and laryngoscopy. Ionizing radiation, associated with virtual bronchoscopy, can be minimized by using low-dose multidetector computed tomography and hybrid iterative reconstruction techniques. Furthermore, retrospectively generated virtual bronchoscopy from a routinely acquired computed tomography data set eliminates additional cost and radiation. In the future, virtual bronchoscopy assisted with advanced navigational techniques will broaden the diagnostic and therapeutic landscape. This article presents the characteristic features of common and rare laryngotracheobronchial pathologies seen with virtual bronchoscopy.

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24

Behera, G., N. Tripathy, Y. K. Maru, R. K. Mundra, Y. Gupta, and M. Lodha. "Role of virtual bronchoscopy in children with a vegetable foreign body in the tracheobronchial tree." Journal of Laryngology & Otology 128, no. 12 (November 12, 2014): 1078–83. http://dx.doi.org/10.1017/s0022215114002837.

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AbstractObjectives:Multidetector computed tomography virtual bronchoscopy is a non-invasive diagnostic tool which provides a three-dimensional view of the tracheobronchial airway. This study aimed to evaluate the usefulness of virtual bronchoscopy in cases of vegetable foreign body aspiration in children.Methods:The medical records of patients with a history of foreign body aspiration from August 2006 to August 2010 were reviewed. Data were collected regarding their clinical presentation and chest X-ray, virtual bronchoscopy and rigid bronchoscopy findings. Cases of metallic and other non-vegetable foreign bodies were excluded from the analysis. Patients with multidetector computed tomography virtual bronchoscopy showing features of vegetable foreign body were included in the analysis. For each patient, virtual bronchoscopy findings were reviewed and compared with those of rigid bronchoscopy.Results:A total of 60 patients; all children ranging from 1 month to 8 years of age, were included. The mean age at presentation was 2.01 years. Rigid bronchoscopy confirmed the results of multidetector computed tomography virtual bronchoscopy (i.e. presence of foreign body, site of lodgement, and size and shape) in 59 patients. In the remaining case, a vegetable foreign body identified by virtual bronchoscopy was revealed by rigid bronchoscopy to be a thick mucus plug. Thus, the positive predictive value of virtual bronchoscopy was 98.3 per cent.Conclusion:Multidetector computed tomography virtual bronchoscopy is a sensitive and specific diagnostic tool for identifying radiolucent vegetable foreign bodies in the tracheobronchial tree. It can also provide a useful pre-operative road map for rigid bronchoscopy. Patients suspected of having an airway foreign body or chronic unexplained respiratory symptoms should undergo multidetector computed tomography virtual bronchoscopy to rule out a vegetable foreign body in the tracheobronchial tree and avoid general anaesthesia and invasive rigid bronchoscopy.

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25

Mah, P., M. Noujeim, R. Langlais, and M. Mah. "Virtual airway endoscopy with cone beam computed tomography." Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 101, no. 1 (January 2006): E9—E10. http://dx.doi.org/10.1016/j.tripleo.2005.10.084.

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26

Davila, Marta L., Christopher F. Beaulieu, David S. Paik, Sandy Napel, Peter S. Edelstein, and R. Brooke Jeffrey. "Computed tomography and magnetic resonance colonography (Virtual colonoscopy)." Techniques in Gastrointestinal Endoscopy 2, no. 1 (January 2000): 30–36. http://dx.doi.org/10.1016/s1096-2883(00)80039-x.

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27

Bertoglio, Luca, Germano Melissano, and Roberto Chiesa. "Spiral computed tomography virtual angioscopy of aortic dissection." Journal of Vascular Surgery 53, no. 5 (May 2011): 1409. http://dx.doi.org/10.1016/j.jvs.2010.03.029.

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28

Nambirajan, Thiagarajan, Syed Aslam Sohaib, Christopher Muller-Pollard, Rodney Reznek, and Frank I. Chinegwundoh. "Virtual cystoscopy from computed tomography: a pilot study." BJU International 94, no. 6 (October 2004): 828–31. http://dx.doi.org/10.1111/j.1464-410x.2004.05041.x.

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29

Wang, Tianyi, Kejia Wang, Kaigang Zou, Sishi Shen, Yongqiang Yang, Mengting Zhang, Zhengang Yang, and Jinsong Liu. "Virtual unrolling technology based on terahertz computed tomography." Optics and Lasers in Engineering 151 (April 2022): 106924. http://dx.doi.org/10.1016/j.optlaseng.2021.106924.

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30

Kotlyarov, P. M., N. V. Chernichenko, and V. P. Kharchenko. "VIRTUAL BRONCHOSCOPY OF MULTISPIRAL COMPUTED TOMOGRAPHY WITH TRAUMATIC INJURIES OF THE MAIN BRONCHUS." Diagnostic radiology and radiotherapy, no. 4 (January 31, 2019): 63–67. http://dx.doi.org/10.22328/2079-5343-2018-4-63-67.

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The aim of the study was to evaluate the role of virtual bronchoscopy (VB) in traumatic rupture of the main bronchus Material and methods. Тhe data of virtual bronchoscopy of multispiral computed tomography (MSCT) with multiplanar and 3D reconstructions of 10 patients with traumatic separation of the main bronchus were analyzed. MSCT was carried out by the computer tomograph AquilionONE (320-slice) according to the previously described technique. Results of the study. VB MSCT allowed to determine the presence of a complete or partial rupture of the main bronchus, its distance to the bifurcation of the trachea, the state of the collapsed lung, the presence of fluid in the hemithorax, secondary changes in the bone structures of the chest. The World Bank played an important role in monitoring the adequacy of reconstructive measures on the damaged bronchus, excluding the occurrence of postoperative stenosis. The conclusion. Virtual bronchoscopy of multispiral computed tomography with the capabilities of multiplanar and volumetric reconstructions, postprocessing image processing is an optimal non-invasive method for determining the traumatic lesion of the main bronchi and monitoring the success of the reconstructive surgical manual.

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31

Seemann, Marcus D., Juergen F. Schaefer, and Karl-Hans Englmeier. "Virtual positron emission tomography/computed tomography-bronchoscopy: possibilities, advantages and limitations of clinical application." European Radiology 17, no. 3 (August 15, 2006): 709–15. http://dx.doi.org/10.1007/s00330-006-0350-y.

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32

Dai, Ya Wen, Zhuo Qiu Li, Xiao Yu Zhang, and Si Rong Zhu. "Virtual Experimental Studies on Carbon Fiber Smart Materials Resistivity Tomography." Advanced Materials Research 79-82 (August 2009): 283–86. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.283.

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With the emergence of large-size complex structures, conventional discrete sensors can’t meet the requirement of structure health monitoring because they can only sense the strain in a single direction. In this paper, based on sensing and covering properties of carbon fiber smart material (CFSM), an idea of a sensitive layer placed on the structure surface was proposed. By setting finite electrodes on the edge of the sensitive layer, the stress field of tested structure is transformed to electric field which is apt to be tested, and with resistivity tomography technology (ERT), field(global) monitoring on civil engineering structure can be realized. To avoid impact resulting from measuring errors caused by misc factors in experiment, CFSM ERT system was utilized in virtual experiments. Virtual Experiments were conducted on ANSYS finite element software aided by its excellent abilities in coupled field analysis. The virtual experiments included two cases: circular plate simply supported at its perimeter under single loading of different values in the center, and circular plate simply supported at its perimeter under multipoint loading in different positions. In the virtual experiments current incentive in adjacent electrodes and voltage measurement in other adjacent electrodes were implemented, and the measured voltage data was transmitted to the ERT system to obtain the contour plot of resistivity distribution. It indicates that for the single loaded CFSM virtual experiment with tensile strain, its resistivity is increased with the load increase. Compared with 1st and 2nd principal strain distribution in structure tested area, resistivity distribution will qualitatively reflect force field of structure. In multipoint loaded CFSM virtual experiment with compress strain, resistivity descends. Compared with 3rd and 2nd principal strain distribution in structure tested area, low resistivity area just locates at area of biggest strain. Based on virtual experiment, efficiency of CFSM ERT system is demonstrated, greatly supporting the consequent practical application.

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33

Koukoutsis, Ilias, George Gemenetzis, Charalampos Seretis, Ioannis Manouras, Apostolos Pappas, Nikolaos Koronakis, Ioannis Chrysikos, Andreas Manouras, and Emmanouil Lagoudianakis. "Computed Tomography Contribution to Virtual Preoperative Liver Resection Planning." Recent Patents on Medical Imaging 3, no. 2 (December 31, 2013): 161–63. http://dx.doi.org/10.2174/2210684703666131211003820.

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Mejia, Felipe A., Ben Kurtz, Aviad Levis, Íñigo de la Parra, and Jan Kleissl. "Cloud tomography applied to sky images: A virtual testbed." Solar Energy 176 (December 2018): 287–300. http://dx.doi.org/10.1016/j.solener.2018.10.023.

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35

Guo, Jessica, and Carolyn A. Larabell. "Soft X-ray tomography: virtual sculptures from cell cultures." Current Opinion in Structural Biology 58 (October 2019): 324–32. http://dx.doi.org/10.1016/j.sbi.2019.06.012.

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36

Perchet, Diane, Catalin I. Fetita, Laurence Vial, Françoise Prêteux, George Caillibotte, Gabriela Sbiêrlea-Apiou, and Marc Thiriet. "Virtual investigation of pulmonary airways in volumetric computed tomography." Computer Animation and Virtual Worlds 15, no. 34 (June 16, 2004): 361–76. http://dx.doi.org/10.1002/cav.40.

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37

Sodhi, Kushaljit Singh, Akshay Kumar Saxena, Sameer Vyas, and Niranjan Khandelwal. "Multidetector computed tomography virtual bronchoscopy: comparison with fiberoptic bronchoscopy." Acta Radiologica 53, no. 3 (April 2012): 366. http://dx.doi.org/10.1258/ar.2011.110640.

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38

Nickolas, Thomas L., Shayan Shirazian, and Elizabeth Shane. "High-resolution computed tomography imaging: a virtual bone biopsy." Kidney International 77, no. 11 (June 2010): 1046. http://dx.doi.org/10.1038/ki.2009.558.

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39

Werncke, Thomas, Bernhard Christian Meyer, Frank K. Wacker, and Christian von Falck. "Virtual Single-Source Computed Tomography Using Dual-Source Acquisition." Investigative Radiology 49, no. 11 (November 2014): 742–48. http://dx.doi.org/10.1097/rli.0000000000000078.

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40

Wu, D., X. Wang, C. Tao, and X. J. Liu. "Limited-view photoacoustic tomography utilizing backscatterers as virtual transducers." Applied Physics Letters 99, no. 24 (December 12, 2011): 244102. http://dx.doi.org/10.1063/1.3669512.

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41

Chaadaeva, Yu A., N. A. Gorbunov, and A. P. Dergilev. "COMPUTED TOMOGRAPHY VIRTUAL BRONCHOSCOPY IN PATIENTS WITH PULMONARY TUBERCULOSIS." Sibirskij medicinskij vestnik, no. 4 (2021): 23–29. http://dx.doi.org/10.31549/2541-8289-2021-4-23-29.

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42

Itano, Hideki, Yutaka Hirokawa, and Koumei Takauchi. "Clinical utility of three-dimensional integrated 18F-fluorodeoxyglucose positron-emission tomography/computed tomography virtual mediastinoscopy☆." Interactive CardioVascular and Thoracic Surgery 10, no. 6 (June 1, 2010): 981–85. http://dx.doi.org/10.1510/icvts.2009.217794.

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43

Liu, Zhenghua, Yuting Zhang, Zhou Liu, Jiangtao Kong, Dageng Huang, Xiaoyue Zhang, and Yonghong Jiang. "Dual-Energy Computed Tomography Virtual Noncalcium Technique in Diagnosing Osteoporosis: Correlation With Quantitative Computed Tomography." Journal of Computer Assisted Tomography 45, no. 3 (May 2021): 452–57. http://dx.doi.org/10.1097/rct.0000000000001168.

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44

Mohammed, Mohammed Siddig H., Essam M. Banoqitah, Ezzat Elmoujarkach, Abdulsalam M. Alhawsawi, and Fathi Djouider. "A virtual laboratory for radiotracer and sealed-source applications in industry." Nukleonika 66, no. 1 (March 1, 2021): 21–27. http://dx.doi.org/10.2478/nuka-2021-0003.

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Abstract Radioactive sealed sources and radiotracer techniques are used to diagnose industrial process units. This work introduces a workspace to simulate four sealed sources and radiotracer applications, namely, gamma scanning of distillation columns, gamma scanning of pipes, gamma transmission tomography, and radiotracer flow rate measurements. The workspace was created in Geant4 Application for Tomographic Emission (GATE) simulation toolkit and was called Industrial Radioisotope Applications Virtual Laboratory. The flexibility of GATE and the fact that it is an open-source software render it advantageous to radioisotope technology practitioners, educators, and students. The comparison of the simulation results with experimental results that are available in the literature showed the effectiveness of the virtual laboratory.

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45

Frohn, Jasper, Diana Pinkert-Leetsch, Jeannine Missbach-Güntner, Marius Reichardt, Markus Osterhoff, Frauke Alves, and Tim Salditt. "3D virtual histology of human pancreatic tissue by multiscale phase-contrast X-ray tomography." Journal of Synchrotron Radiation 27, no. 6 (October 23, 2020): 1707–19. http://dx.doi.org/10.1107/s1600577520011327.

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A multiscale three-dimensional (3D) virtual histology approach is presented, based on two configurations of propagation phase-contrast X-ray tomography, which have been implemented in close proximity at the GINIX endstation at the beamline P10/PETRA III (DESY, Hamburg, Germany). This enables the 3D reconstruction of characteristic morphological features of human pancreatic normal and tumor tissue, as obtained from cancer surgery, first in the form of a large-scale overview by parallel-beam illumination, followed by a zoom into a region-of-interest based on zoom tomography using a Kirkpatrick–Baez mirror with additional waveguide optics. To this end 1 mm punch biopsies of the tissue were taken. In the parallel tomography, a volumetric throughput on the order of 0.01 mm3 s−1 was achieved, while maintaining the ability to segment isolated cells. With a continuous rotation during the scan, a total acquisition time of less than 2 min was required for a full tomographic scan. Using the combination of both setups, islets of Langerhans, a three-dimensional cluster of cells in the endocrine part of the pancreas, could be located. Cells in such an islet were segmented and visualized in 3D. Further, morphological alterations of tumorous tissue of the pancreas were characterized. To this end, the anisotropy parameter Ω, based on intensity gradients, was used in order to quantify the presence of collagen fibers within the entire biopsy specimen. This proof-of-concept experiment of the multiscale approach on human pancreatic tissue paves the way for future 3D virtual pathology.

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46

Ballesteros Pradas, S. M., N. Romero Rodríguez, E. Lage Gallé, M. Sobrino Marquez, M. Fernández Quero, M. Villa Gil-Ortega, A. Sánchez González, and A. Martínez Martínez. "Cardiac Allograft Vasculopathy: Coronary Computed Tomography and Virtual Histology Assessment." Transplantation Proceedings 42, no. 8 (October 2010): 3175–77. http://dx.doi.org/10.1016/j.transproceed.2010.05.067.

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47

Rao, Yogesh, N. P. Sarwade, and Roshan Makkar. "Modeling and Simulation of Optical Coherence Tomography on Virtual OCT." Procedia Computer Science 45 (2015): 644–50. http://dx.doi.org/10.1016/j.procs.2015.03.121.

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48

Nie, Liming, Zijian Guo, and Lihong V. Wang. "Photoacoustic tomography of monkey brain using virtual point ultrasonic transducers." Journal of Biomedical Optics 16, no. 7 (2011): 076005. http://dx.doi.org/10.1117/1.3595842.

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49

Masero, V., J. Moreno, A. Silva, F. Andres, J. Chambel, and J. Uson. "Image processing from computerized tomography images: Virtual reconstruction for telediagnosis." Journal of Telemedicine and Telecare 6, no. 2_suppl (August 2000): 94–96. http://dx.doi.org/10.1258/1357633001935770.

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We have developed a system for remote three-dimensional reconstruction, which facilitates telediagnosis. The telereconstruction system is based on a computerized tomography (CT) scanner, a workstation connected to the CT scanner, a PC, which can be geographically far away from the workstation, and a computer program that we have developed. The workstation allows CT images to be stored and image processing to be carried out. The PC permits the user to control the workstation in making a three-dimensional reconstruction and allows the remote user to see that reconstruction. From the PC various graphical operations can be performed on the three-dimensional model, such as rotations, translations and cuts through the model. The program therefore allows a remote user to have three-dimensional images and to study them by means of all the options the program provides.

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50

Ambrosi, Christina M., Nader Moazami, Andrew M. Rollins, and Igor R. Efimov. "Virtual histology of the human heart using optical coherence tomography." Journal of Biomedical Optics 14, no. 5 (2009): 054002. http://dx.doi.org/10.1117/1.3213604.

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