Готові списки джерел за темами / Quantitative magnetic resonance angiography

Добірка наукової літератури з теми "Quantitative magnetic resonance angiography"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 29 січня 2023

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Статті в журналах з теми "Quantitative magnetic resonance angiography"

1

Clifton, Andrew. "Quantitative Magnetic Resonance Angiography." Stroke 40, no. 3 (March 2009): 676. http://dx.doi.org/10.1161/strokeaha.108.529297.

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2

Kellner-Weldon, F. "Quantitative Magnetic Resonance Angiography." Clinical Neuroradiology 22, no. 1 (February 4, 2012): 115–18. http://dx.doi.org/10.1007/s00062-012-0131-8.

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3

Amin-Hanjani, Sepideh, John H. Shin, Meide Zhao, Xinjian Du, and Fady T. Charbel. "Evaluation of extracranial–intracranial bypass using quantitative magnetic resonance angiography." Journal of Neurosurgery 106, no. 2 (February 2007): 291–98. http://dx.doi.org/10.3171/jns.2007.106.2.291.

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Object To date, angiography has been the primary modality for assessing graft patency following extracranial–intracranial bypass. The utility of a noninvasive and quantitative method of assessing bypass function postoperatively was evaluated using quantitative magnetic resonance (MR) angiography. Methods One hundred one cases of bypass surgery performed over a 5.5-year period at a single institution were reviewed. In 62 cases, both angiographic and quantitative MR angiographic data were available. Intraoperative flow measurements were available in 13 cases in which quantitative MR angiography was performed during the early postoperative period (within 48 hours after surgery). There was excellent correlation between quantitative MR angiographic flow and angiographic findings over the mean 10 months of imaging follow up. Occluded bypasses were consistently absent on quantitative MR angiograms (four cases). The flow rates were significantly lower in those bypasses that became stenotic or reduced in diameter as demonstrated by follow-up angiography (nine cases) than in those bypasses that remained fully patent (mean ± standard error of the mean, 37 ± 13 ml/minute compared with 105 ± 7 ml/minute, p = 0.001). Flows were appreciably lower in poorly functioning bypasses for both vein and in situ arterial grafts. All angiographically poor bypasses (nine cases) were identifiable by absolute flows of less than 20 ml/minute or a reduction in flow greater than 30% within 3 months. Good correlation was seen between intraoperative flow measurements and early postoperative quantitative MR angiographic flow measurements (13 cases, Pearson correlation coefficient = 0.70, p = 0.02). Conclusions Bypass grafts can be assessed in a noninvasive fashion by using quantitative MR angiography. This imaging modality provides not only information regarding patency as shown by conventional angiography, but also a quantitative assessment of bypass function. In this study, a low or rapidly decreasing flow was indicative of a shrunken or stenotic graft. Quantitative MR angiography may provide an alternative to standard angiography for serial follow up of bypass grafts.
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4

Langer, David J., Daniel R. Lefton, Lauren Ostergren, Carolyn D. Brockington, Joon Song, Yasunari Niimi, Peeyush Bhargava, and Alejandro Berenstein. "Hemispheric Revascularization in the Setting of Carotid Occlusion and Subclavian Steal: A Diagnostic and Management Role for Quantitative Magnetic Resonance Angiography?" Neurosurgery 58, no. 3 (March 1, 2006): 528–33. http://dx.doi.org/10.1227/01.neu.0000197331.41985.15.

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Abstract OBJECTIVE: Advances in phase contrast magnetic resonance imaging have facilitated the noninvasive assessment of blood flow rates and flow direction in patients with complex cerebrovascular disorders. METHODS: We describe a case of right hemispheric hypoperfusion in which, on noninvasive assessment with quantitative magnetic resonance angiography, the patient was found to harbor an occult subclavian steal with flow reversal in the left vertebral artery. RESULTS: The presence of posterior communicating arteries noted on quantitative magnetic resonance angiography suggested that normalization of flow in the vertebral arteries by treating the subclavian occlusion could improve flow in the anterior circulation. Angiography confirmed the noninvasive findings, and the subclavian occlusion was treated with angioplasty and stenting. Postintervention quantitative magnetic resonance angiography documented quantitative improvement in right middle cerebral artery flow and restoration of antegrade flow in the left vertebral artery. CONCLUSION: This case illustrates the potential role of noninvasive assessment of blood flow rates and flow direction in the diagnosis, treatment planning, and follow-up of patients with complex cerebrovascular disease.
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5

Kim, D. H. "Evaluation of extracranial–intracranial bypass using quantitative magnetic resonance angiography." Yearbook of Neurology and Neurosurgery 2008 (January 2008): 226–27. http://dx.doi.org/10.1016/s0513-5117(08)79156-7.

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6

Watanuki, Atsushi, Hideaki Yoshino, Hiroshi Udagawa, Kenichi Yokoyama, Toshiaki Nitatori, Junichi Hachiya, and K. Ishikawa. "Quantitative evaluation of coronary stenosis by coronary magnetic resonance angiography." Heart and Vessels 15, no. 4 (July 2000): 159–66. http://dx.doi.org/10.1007/s003800070017.

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7

Amin-Hanjani, Sepideh, Ali Alaraj, Mateo Calderon-Arnulphi, Victor A. Aletich, Keith R. Thulborn, and Fady T. Charbel. "Detection of Intracranial In-Stent Restenosis Using Quantitative Magnetic Resonance Angiography." Stroke 41, no. 11 (November 2010): 2534–38. http://dx.doi.org/10.1161/strokeaha.110.594739.

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Brisman, Jonathan L. "Wingspan stenting of symptomatic extracranial vertebral artery stenosis and perioperative evaluation using quantitative magnetic resonance angiography: report of two cases." Neurosurgical Focus 24, no. 2 (February 2008): E14. http://dx.doi.org/10.3171/foc/2008/24/2/e14.

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✓The best management strategy for symptomatic vertebrobasilar ischemia is currently not well-defined. Noninvasive Optimal Vessel Analysis (NOVA, VasSol, Inc.) is computer software that, using quantitative magnetic resonance (MR) angiography technology, represents the only commercially available means of noninvasively measuring blood flow within the human vasculature. The author used quantitative MR angiography to study cerebral blood flow in 2 patients who underwent angioplasty and stenting for medically refractory extracranial cervical vertebral artery (VA) stenosis using the recently Food and Drug Administration–approved WingSpan stent (Boston Scientific, Target). WingSpan stents were successfully placed after balloon angioplasty in both patients without complications. At the 5-month clinical follow-up examination, 1 patient was symptom free and the other had had a possible transient ischemic attack without sequelae. The WingSpan stent may represent an alternative management scheme for symptomatic vertebrobasilar ischemia from extracranial VA stenosis. Quantitative MR angiography can readily measure blood flow in the vertebrobasilar system, and these values correlated with the angiographic outcomes in the 2 patients treated in the present study.
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Mavrogeni, Sophie, Athanassios Manginas, Emmanouil Papadakis, Stefanos Foussas, Marouso Douskou, Panagiotis Baras, Ioannis Seimenis, and Dennis Cokkinos. "Correlation Between Magnetic Resonance Angiography (MRA) and Quantitative Coronary Angiography (QCA) in Ectatic Coronary Vessels." Journal of Cardiovascular Magnetic Resonance 6, no. 1 (2004): 17–23. http://dx.doi.org/10.1081/jcmr-120027801.

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Amin-Hanjani, Sepideh, Amritha Singh, Hashem Rifai, Keith R. Thulborn, Ali Alaraj, Victor Aletich, and Fady T. Charbel. "Combined Direct and Indirect Bypass for Moyamoya." Neurosurgery 73, no. 6 (August 13, 2013): 962–68. http://dx.doi.org/10.1227/neu.0000000000000139.

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Abstract BACKGROUND: The optimal revascularization strategy for symptomatic adult moyamoya remains controversial. Whereas direct bypass offers immediate revascularization, indirect bypass can effectively induce collaterals over time. OBJECTIVE: Using angiography and quantitative magnetic resonance angiography, we examined the relative contributions of direct and indirect bypass in moyamoya patients after combined direct superficial temporal artery-to-middle cerebral artery (STA-MCA) bypass and indirect encephaloduroarteriosynangiosis (EDAS). METHODS: A retrospective review of moyamoya patients undergoing combined STA-MCA bypass and EDAS was conducted, excluding pediatric patients and hemorrhagic presentation. Patients with quantitative magnetic resonance angiography measurements of the direct bypass immediately and > 6 months postoperatively were included. Angiographic follow-up, when available, was used to assess EDAS collaterals at similar time intervals. RESULTS: Of 16 hemispheres in 13 patients, 11 (69%) demonstrated a significant (> 50%) decline in direct bypass flow at > 6 months compared with baseline, averaging a drop from 99 ± 35 to12 ± 7 mL/min. Conversely, angiography in these hemispheres demonstrated prominent indirect collaterals, in concert with shrinkage of the STA graft. Decline in flow was apparent at a median of 9 months but was evident as early as 2 to 3 months. CONCLUSION: In this small cohort, a reciprocal relationship between direct STA bypass flow and indirect EDAS collaterals frequently occurred. This substantiates the notion that combined direct/indirect bypass can provide temporally complementary revascularization.
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Дисертації з теми "Quantitative magnetic resonance angiography"

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Sobieh, Ahmed Mohammed Abdelaal Mohammed [Verfasser], and Uwe [Akademischer Betreuer] Klose. "Quantitative magnetic resonance angiography for flow quantification of carotid and intracranial stenosis / Ahmed Mohammed Abdelaal Mohammed Sobieh ; Betreuer: Uwe Klose." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1199615536/34.

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Sobieh, Ahmed [Verfasser], and Uwe [Akademischer Betreuer] Klose. "Quantitative magnetic resonance angiography for flow quantification of carotid and intracranial stenosis / Ahmed Mohammed Abdelaal Mohammed Sobieh ; Betreuer: Uwe Klose." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1199615536/34.

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Bergman, Harris L. "Knowledge-based magnetic resonance angiography." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/18247.

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Saranathan, Manojkumar. "Advances in magnetic resonance coronary angiography /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/8000.

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Vafadar, Bahareh. "Fast methods for Magnetic Resonance Angiography (MRA)." Thesis, University of Canterbury. Electrical and Computer Engineering, 2014. http://hdl.handle.net/10092/9332.

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Magnetic resonance imaging (MRI) is a highly exible and non-invasive medical imaging modality based on the concept of nuclear magnetic resonance (NMR). Compared to other imaging techniques, major limitation of MRI is the relatively long acquisition time. The slowness of acquisition makes MRI difficult to apply to time-sensitive clinical applications. Acquisition of MRA images with a spatial resolution close to conventional digital subtraction angiography is feasible, but at the expense of reduction in temporal resolution. Parallel MRI employs multiple receiver coils to speed up the MRI acquisition by reducing the number of data points collected. Although, the reconstructed images from undersampled data sets often suffer from different different types of degradation and artifacts. In contrast-enhanced magnetic resonance imaging, information is effectively measured in 3D k-space one line at a time therefore the 3D data acquisition extends over several minutes even using parallel receiver coils. This limits the assessment of high ow lesions and some vascular tumors in patients. To improve spatio-temporal resolution in contrast enhanced magnetic resonance angiography (CE-MRA), the use of incorporating prior knowledge in the image recovery process is considered in this thesis. There are five contributions in this thesis. The first contribution is the modification of generalized unaliasing using support and sensitivity encoding (GUISE). GUISE was introduced by this group to explore incorporating prior knowledge of the image to be reconstructed in parallel MRI. In order to provide improved time-resolved MRA image sequences of the blood vessels, the GUISE method requires an accurate segmentation of the relatively noisy 3D data set into vessel and background. The method that was originally used for definition of the effective region of support was primitive and produced a segmented image with much false detection because of the effect of overlying structures and the relatively noisy background in images. We proposed to use the statistical principle as employed for the modified maximum intensity projection (MIP) to achieve better 3D segmentation and optimal visualization of blood vessels. In comparison with the previous region of support (ROS), the new one enables higher accelerations MRA reconstructions due to the decreased volume of the ROS and leads to less computationally expensive reconstruction. In the second contribution we demonstrated the impact of imposing the Karhunen-Loeve transform (KLT) basis for the temporal changes, based on prior expectation of the changes in contrast concentration with time. In contrast with other transformation, KLT of the temporal variation showed a better contrast to noise ratio (CNR) can be achieved. By incorporating a data ordering step with compressed sensing (CS), an improvement in image quality for reconstructing parallel MR images was exhibited in prior estimate based compressed sensing (PECS). However, this method required a prior estimate of the image to be available. A singular value decomposition (SVD) modification of PECS algorithm (SPECS) to explore ways of utilising the data ordering step without requiring a prior estimate was extended as the third contribution. By employing singular value decomposition as the sparsifying transform in the CS algorithm, the recovered image was used to derive the data ordering in PECS. The preliminary results outperformed the PECS results. The fourth contribution is a novel approach for training a dictionary for sparse recovery in CE-MRA. The experimental results demonstrate improved reconstructions on clinical undersampled dynamic images. A new method recently has been developed to exploit the structure of the signal in sparse representation. Group sparse compressed sensing (GSCS) allows the efficient reconstruction of signals whose support is contained in the union of a small number of groups (sets) from a collection of pre-defined disjoint groups. Exploiting CS applications in dynamic MR imaging, a group sparse method was introduced for our contrast-enhanced data set. Instead of incorporating data ordering resulted from prior information, pre-defined sparsity patterns were used in the PECS recovery algorithm, resulting to a suppression of noise in the reconstruction.
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Troalen, Thomas. "IRM quantitative de la perfusion myocardique par marquage de spins artériels = Quantitative myocardial perfusion MRI using arterial spin labeling." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM5006/document.

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La perfusion est un facteur important dans la viabilité et la fonction du myocarde. Des atteintes microvasculaires diffuses, précédant l'infarctus ou l'insuffisance cardiaque sont impliqués dans bon nombre de pathologies cardiaques. Ce travail vise à améliorer les techniques existantes de mesure quantitatives et non-invasive de la perfusion myocardique par marquage de spins artériels (ASL). La première partie de mon travail de thèse a consisté en la mise place chez la souris d'une technique alternative pour mesurer la perfusion myocardique. Celle-ci est basée sur un marquage pulsé et régulièrement répété afin de construire un état d'équilibre de l'aimantation sous l'influence de la perfusion (approche steady-pulsed ASL). Le modèle théorique associé à cette technique spASL a été développé en parallèle afin de quantifier le flux sanguin tissulaire. Il a été montré que spASL permettait d'obtenir un résultat similaire aux techniques existantes avec en plus, les avantages d'améliorer la sensibilité au signal de perfusion ainsi que de réduire le temps d'acquisition. Dans un second temps, un transfert vers l'imagerie clinique pour une application chez l'homme a été entrepris. Le marquage de type spASL a été conservé et le module de lecture a été adapté aux spécificités de l'imagerie cardiaque chez l'homme pour une acquisition en respiration libre. Un post-traitement dédié qui comprend une correction de mouvement rétrospective a ensuite vu le jour afin d'améliorer la robustesse de nos mesures. Parallèlement aux développements conduits chez l'homme, nous avons exploité l'approche spASL chez l'animal en proposant diverses améliorations en fonction des études menées
Myocardial blood flow is an important factor of tissue viability and function. Diffuse changes in microcirculation preceding heart failure are involved in various cardiac pathologies. This work aim at improving existing techniques allowing quantitative and non-invasive myocardial perfusion assessment using arterial spin labeling. The first step of my work was to design an alternative approach to quantify myocardial blood flow in mice. The so called steady-pulsed ASL (spASL) is based on a regularly repeated pulsed labeling in order to build up a stationary regime of the magnetization under the influence of perfusion. The associated theoretical model has been developed in parallel to quantify tissue blood flow. We have shown that spASL allows to obtain similar results than the previously employed techniques, with the additional advantages of an increased sensitivity to the perfusion signal and a reduced acquisition time. A transfer towards clinical imaging for human applications was then undertaken. The spASL labeling scheme has been preserved while adapting the readout module to the specificities of cardiac MRI when applied to free-breathing human acquisitions. A dedicated post-processing, which includes a retrospective motion correction, has emerged subsequently to improve the robustness of our measurements. In parallel to the developments made for human studies, some optimization of the spASL technique when applied to rodent have been carried out depending on the conducted studies
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7

Grisham, Joe P. 1950. "Phase enhanced time-of-flight magnetic resonance angiography." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/46454.

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Wong, Pauline. "Interactive magnetic resonance angiography using fresh blood imaging." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611244.

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Hansen, Tomas. "Assessment of Atherosclerosis by Whole-Body Magnetic Resonance Angiography." Doctoral thesis, Uppsala : Department of Oncology, Radiology and Clinical Immunology Institutionen för onkologi, radiologi och klinisk immunologi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7778.

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Ho, K. Y. J. A. M. "MR angiography of the lower extremities." [Maastricht : Maastricht : Universiteit Maastricht] ; University Library, Maastricht University [Host], 1999. http://arno.unimaas.nl/show.cgi?fid=6889.

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Книги з теми "Quantitative magnetic resonance angiography"

1

Arlart, Ingolf P., Georg M. Bongartz, and Guy Marchal, eds. Magnetic Resonance Angiography. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-56247-1.

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2

Arlart, Ingolf P., Georg M. Bongartz, and Guy Marchal, eds. Magnetic Resonance Angiography. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-97926-2.

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3

Schneider, Günther, Martin R. Prince, James F. M. Meaney, and Vincent B. Ho, eds. Magnetic Resonance Angiography. Milan: Springer-Verlag, 2005. http://dx.doi.org/10.1007/b138651.

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Carr, James C., and Timothy J. Carroll, eds. Magnetic Resonance Angiography. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-1686-0.

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5

Duerinckx, André J., ed. Coronary Magnetic Resonance Angiography. New York, NY: Springer New York, 2002. http://dx.doi.org/10.1007/b97307.

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J, Carroll Timothy, and SpringerLink (Online service), eds. Magnetic Resonance Angiography: Principles and Applications. New York, NY: Springer Science+Business Media, LLC, 2012.

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7

1958-, Grist Thomas M., and Debatin Jörg F. 1961-, eds. 3D contrast MR angiography. Berlin: Springer, 1997.

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8

1958-, Grist Thomas M., and Debatin Jorg F. 1961-, eds. 3D contrast MR angiography. 2nd ed. Berlin: Springer, 1999.

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9

Buonincontri, Guido, Joshua Kaggie, and Martin Graves. Fast Quantitative Magnetic Resonance Imaging. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-031-01667-7.

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10

Bunce, Nicholas. An atlas of contrast-enhanced angiography: Three-dimensional magnetic resonance angiography. Boca Raton: Parthenon Publishing Group, 2003.

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Частини книг з теми "Quantitative magnetic resonance angiography"

1

Peters, Benjamin, Sven Dekeyzer, Omid Nikoubashman, and Paul Marie Parizel. "Magnetic Resonance Angiography." In Neuroimaging Techniques in Clinical Practice, 123–40. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48419-4_10.

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McElligott, Jacinta. "Magnetic Resonance Angiography." In Encyclopedia of Clinical Neuropsychology, 2062–63. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-57111-9_47.

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3

Loose, R., Klaus Detmar, and U. Böttcher. "Magnetic Resonance Angiography." In Radiology of Peripheral Vascular Diseases, 255–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-56956-2_12.

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McElligott, Jacinta. "Magnetic Resonance Angiography." In Encyclopedia of Clinical Neuropsychology, 1. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56782-2_47-3.

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5

Farley, April, Javier E. Anaya-Ayala, Mark G. Davies, and Alan B. Lumsden. "Magnetic Resonance Angiography." In Haimovici's Vascular Surgery, 99–111. Oxford, UK: Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781118481370.ch6.

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François, Christopher J. "Magnetic Resonance Angiography." In Cardiac CT and MR for Adult Congenital Heart Disease, 55–76. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8875-0_4.

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Weber, Johannes, and Michael Forsting. "Magnetic Resonance Angiography." In Current Review of Cerebrovascular Disease, 85–92. London: Current Medicine Group, 2001. http://dx.doi.org/10.1007/978-1-4684-0001-4_8.

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Lipton, M., and G. Karczmar. "Magnetic Resonance Angiography." In Diagnostics of Vascular Diseases, 114–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60512-3_7.

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McElligott, Jacinta. "Magnetic Resonance Angiography." In Encyclopedia of Clinical Neuropsychology, 1507. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-0-387-79948-3_47.

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Siewert, B., R. R. Edelman, and P. A. Wielopolski. "Thorax — Pulmonary Angiography." In Magnetic Resonance Angiography, 223–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-97926-2_14.

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Тези доповідей конференцій з теми "Quantitative magnetic resonance angiography"

1

Hsiao, C. C., J. C. Jao, Y. N. Ting, H. B. Pan, S. T. Lai, and P. C. Chen. "The Quantitative Assessment of Gd-DTPA in Contrast Enhanced Magnetic Resonance Angiography." In 2005 IEEE Engineering in Medicine and Biology 27th Annual Conference. IEEE, 2005. http://dx.doi.org/10.1109/iembs.2005.1616687.

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2

Petra, F., F. Daniel, P. Del Popolo, F. Gonzalez, and G. Caballero. "P54 Quantitative hemodynamic analysis of aneurysms using functional magnetic resonance angiography techniques. Initial experience." In ESMINT Abstracts. BMA House, Tavistock Square, London, WC1H 9JR: BMJ Publishing Group Ltd., 2022. http://dx.doi.org/10.1136/neurintsurg-2022-esmint.75.

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3

Shin, Minchul, Brigitta C. Brott, Steven G. Lloyd, William T. Evanochko, Pál Kiss, Robert A. Baker, and Andreas S. Anayiotos. "MRI Evaluation of a Stented Abdominal Aorta of a Rabbit." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176395.

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Анотація:
MRI is an attractive non-invasive angiographic modality not requiring nephrotoxic contrast agents and damaging exposure to radiation such as traditional angiography and multislice CT. It has previously been shown to provide consistently accurate non-invasive information from the stented regions of peripheral vessels even under stenotic conditions [1–3]. The aim of this study is to show that phase contrast magnetic resonance (PC-MR) can be used to provide accurate quantitative information of blood flow in smaller stented vessels such as the coronaries, using an in-vitro model and a rabbit aorta model. The ultimate goal of the project is to evaluate in-stent restenosis in stented coronary vessels, ultimately describing the degree of stenosis based on blood velocity indices such as translesional pressure gradient and peak systolic velocity ratio (PSVR).
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4

Suh, Ga Young, Gilwoo Choi, Mary Draney Blomme, and Charles A. Taylor. "Quantification of Three-Dimensional Motion of the Renal Arteries Using Image-Based Modeling Techniques." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176291.

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Stents implanted to treat renal artery stenosis are vulnerable to stent fracture and thrombosis [1–3]. We hypothesize that the motion of the renal arteries during respiration is a possible cause of stent fracture or in-stent restenosis. However, the respiratory motion of the renal arteries and the kidneys is poorly understood. Using magnetic resonance imaging data we previously quantified the two-dimensional deformation of the renal arteries and demonstrated that respiration-induced kidney motion results in vessel bending near the ostia [4]. In this study we quantified the complex three-dimensional motion of the renal arteries and kidneys over the respiratory cycle using magnetic resonance angiography data and imaged-based modeling methods. We provide quantitative information on anatomic changes to the renal arteries that may provide data to design improved pre-clinical, benchtop tests for renal stents.
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Holton, Andrea D., Brigitta C. Brott, Edward G. Walsh, Ramakrishna Venugopalan, Alan M. Shih, Roy Koomullil, Yasushi Ito, and Andreas S. Anayiotos. "Comparative Computational Fluid Dynamics and Experimental Phase-Contrast MRI: Evaluations of In-Stent Restenosis." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59355.

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While angiography and other translesional catheter-based assessments of stented peripheral vasculature are currently used in clinical applications, a quantitative non-invasive imaging modality would improve the treatment of intermediate levels of in-stent restenosis (ISR). The use of magnetic resonance imaging (MRI), in metal stents has been limited due to magnetic susceptibility artifacts and radiofrequency shielding effects. However, MRI compatible materials such as nickel-titanium alloys used in stents have shown superior lumen visibility. In this study, we used phase contrast MRI in a flow phantom of three different geometries of stenosis: a) 90% axisymmetric, b) 75% axisymmetric and c) 50% asymmetric. The velocity distribution was obtained at 3 different locations inside the stent. This was compared with an equivalent computational fluid dynamics (CFD) model of the same stenotic geometries.
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6

Manning, Warren J., and Robert Edelman. "Magnetic resonance coronary angiography." In OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, edited by Abund O. Wist. SPIE, 1993. http://dx.doi.org/10.1117/12.154959.

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7

Chen, Yikai. "Study of magnetic resonance coronary angiography based on functional magnetic resonance imaging." In 4TH INTERNATIONAL CONFERENCE ON FRONTIERS OF BIOLOGICAL SCIENCES AND ENGINEERING (FBSE 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0094784.

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8

Nystroem, Ingela. "Skeletonization applied to magnetic resonance angiography images." In Medical Imaging '98, edited by Kenneth M. Hanson. SPIE, 1998. http://dx.doi.org/10.1117/12.310949.

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9

Changgong Zhang, Martijn van de Giessen, Elmar Eisemann, and Anna Vilanova. "User-guided compressed sensing for magnetic resonance angiography." In 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2014. http://dx.doi.org/10.1109/embc.2014.6944109.

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10

Bones, P. J., B. Wu, B. Vafadar, A. P. H. Butler, and R. Watts. "On Improved Temporal Resolution for Magnetic Resonance Angiography." In Signal Recovery and Synthesis. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/srs.2009.stua3.

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Звіти організацій з теми "Quantitative magnetic resonance angiography"

1

Stoumpos, Sokratis, Patrick Mark, David Kingsmore, Giles Roditi, and Aleksandra Radjenovic. Use of Ferumoxytol enhanced Magnetic Resonance Angiography for cardiovascular assessment in late-stage chronic kidney disease. University of Glasgow, April 2020. http://dx.doi.org/10.36399/gla.pubs.215112.

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