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Journal articles on the topic 'MRI physics'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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1

Lambert, R. G. W. "MRI Physics for Physicians." Radiology 174, no. 1 (January 1990): 186. http://dx.doi.org/10.1148/radiology.174.1.186.

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2

Sharma, Harish A. "MRI physics–basic principles." Acta Neuropsychiatrica 21, no. 4 (August 2009): 200–201. http://dx.doi.org/10.1111/j.1601-5215.2009.00404.x.

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3

Sharma, Harish A., and Jim Lagopoulos. "MRI physics: pulse sequences." Acta Neuropsychiatrica 22, no. 2 (April 2010): 90–92. http://dx.doi.org/10.1111/j.1601-5215.2010.00449.x.

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4

Taghizadeh, Sanaz, and James Lincoln. "MRI experiments for introductory physics." Physics Teacher 56, no. 4 (April 2018): 266–68. http://dx.doi.org/10.1119/1.5028251.

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5

Plewes, Donald B., and Walter Kucharczyk. "Physics of MRI: A primer." Journal of Magnetic Resonance Imaging 35, no. 5 (April 12, 2012): spcone. http://dx.doi.org/10.1002/jmri.23550.

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6

Plewes, Donald B., and Walter Kucharczyk. "Physics of MRI: A primer." Journal of Magnetic Resonance Imaging 35, no. 5 (April 12, 2012): 1038–54. http://dx.doi.org/10.1002/jmri.23642.

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7

Kiselev, Valerij G. "Fundamentals of diffusion MRI physics." NMR in Biomedicine 30, no. 3 (February 23, 2017): e3602. http://dx.doi.org/10.1002/nbm.3602.

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8

Panych, Lawrence P., and Bruno Madore. "The physics of MRI safety." Journal of Magnetic Resonance Imaging 47, no. 1 (May 19, 2017): 28–43. http://dx.doi.org/10.1002/jmri.25761.

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9

Raaymakers, B., and J. J. W. Lagendijk. "SP-0483: MRI Linac: physics perspective." Radiotherapy and Oncology 119 (April 2016): S231. http://dx.doi.org/10.1016/s0167-8140(16)31732-7.

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10

Luypaert, R., S. Boujraf, S. Sourbron, and M. Osteaux. "Diffusion and perfusion MRI: basic physics." European Journal of Radiology 38, no. 1 (April 2001): 19–27. http://dx.doi.org/10.1016/s0720-048x(01)00286-8.

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11

Durrani, Matin. "Medical Physics: Portable MRI moves closer." Physics World 14, no. 9 (September 2001): 8. http://dx.doi.org/10.1088/2058-7058/14/9/8.

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12

Shu, Yunhong. "WE-DE-206-00: MRI Physics." Medical Physics 43, no. 6Part40 (June 2016): 3816. http://dx.doi.org/10.1118/1.4957852.

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13

Lurie, David J. "Basic MRI physics for radiotherapy physicists." Physica Medica 32 (September 2016): 175. http://dx.doi.org/10.1016/j.ejmp.2016.07.283.

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14

Roy, Trisha L., Thomas L. Forbes, Andrew D. Dueck, and Graham A. Wright. "MRI for peripheral artery disease: Introductory physics for vascular physicians." Vascular Medicine 23, no. 2 (March 14, 2018): 153–62. http://dx.doi.org/10.1177/1358863x18759826.

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Magnetic resonance imaging (MRI) has advanced significantly in the past decade and provides a safe and non-invasive method of evaluating peripheral artery disease (PAD), with and without using exogenous contrast agents. MRI offers a promising alternative for imaging patients but the complexity of MRI can make it less accessible for physicians to understand or use. This article provides a brief introduction to the technical principles of MRI for physicians who manage PAD patients. We discuss the basic principles of how MRI works and tailor the discussion to how MRI can evaluate anatomic characteristics of peripheral arterial lesions.
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15

Marques, José P., Frank F. J. Simonis, and Andrew G. Webb. "Low‐field MRI: An MR physics perspective." Journal of Magnetic Resonance Imaging 49, no. 6 (January 13, 2019): 1528–42. http://dx.doi.org/10.1002/jmri.26637.

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16

Currie, Stuart, Nigel Hoggard, Ian J. Craven, Marios Hadjivassiliou, and Iain D. Wilkinson. "Understanding MRI: basic MR physics for physicians." Postgraduate Medical Journal 89, no. 1050 (December 7, 2012): 209–23. http://dx.doi.org/10.1136/postgradmedj-2012-131342.

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17

Sanders, E. "MRI physics for radiologists a visual approach." European Journal of Radiology 16, no. 1 (December 1992): 74. http://dx.doi.org/10.1016/0720-048x(92)90249-9.

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18

FUKUYAMA, Hidenao. "Diffusion MRI." Plasma and Fusion Research 2 (2007): S1001. http://dx.doi.org/10.1585/pfr.2.s1001.

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19

Wymer, David T., Kunal P. Patel, William F. Burke, and Vinay K. Bhatia. "Phase-Contrast MRI: Physics, Techniques, and Clinical Applications." RadioGraphics 40, no. 1 (January 2020): 122–40. http://dx.doi.org/10.1148/rg.2020190039.

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20

Sorenson, James. "MRI Physics for Physicians , by Alfred L. Horowitz." Medical Physics 17, no. 6 (November 1990): 1069–70. http://dx.doi.org/10.1118/1.596576.

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21

Tscholl, Philippe Matthias, Florian Wanivenhaus, and Sandro F. Fucentese. "Conventional Radiographs and Magnetic Resonance Imaging for the Analysis of Trochlear Dysplasia: The Influence of Selected Levels on Magnetic Resonance Imaging." American Journal of Sports Medicine 45, no. 5 (February 8, 2017): 1059–65. http://dx.doi.org/10.1177/0363546516685054.

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Background: Trochlear dysplasia is one of the most important risk factors for recurrent patellar instability. It is defined on true lateral conventional radiographs (CR) and axial magnetic resonance imaging (MRI). The type of trochlear dysplasia is decisive for surgical treatment; however, low agreement between CR and MRI has been reported. Purpose: To compare the Dejour classification of trochlear dysplasia on CR and axial MRI using differing levels defined in the literature. Study Design: Cohort study (diagnosis); Level of evidence, 2. Methods: The 4-type classification of trochlear dysplasia by Dejour was used to analyze 228 knees with recurrent patellar dislocations on true lateral CR and axial MRI. The 2-type modification of the Dejour classification was also similarly analyzed. Measurements on axial MRI were performed at 3 different levels: MR1, the most proximal level where the intercondylar notch forms a “Roman arch”; MR2, 3 cm above the joint line; and MR3, the midpatellar height. Results: MR1 was measured at a mean distance of 29 ± 3.5 mm and MR3 at a mean of 38 ± 5.8 mm above the joint line. MR1 and MR2 were always measured on the cartilaginous trochlea, whereas 52% of MR3 was found more proximally. Overall agreement was fair between CR and MR1/MR2 (31.1%/25.4%, respectively) and highest for MR3 (45.2%; P < .01). The highest agreement (81.8%) was found for MR3 with the 2-type trochlear dysplasia classification (low-grade trochlear dysplasia: type A vs high-grade trochlear dysplasia: types B, C, and D) and lower for MR1 (67.5%) and MR2 (62.0%). Conclusion: Trochlear dysplasia measured on CR and MRI shows only fair agreement, especially when the supratrochlear region of the distal femur is not analyzed on axial MRI. MRI analysis that considers the cartilaginous trochlea only tends to underestimate the severity of dysplasia according to Dejour. For a more precise evaluation of trochlear dysplasia, the entire distal femur should be analyzed on axial MRI.
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22

Wald, Lawrence L. "Ultimate MRI." Journal of Magnetic Resonance 306 (September 2019): 139–44. http://dx.doi.org/10.1016/j.jmr.2019.07.016.

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23

Wang, Xiaoqing, Zhengguo Tan, Nick Scholand, Volkert Roeloffs, and Martin Uecker. "Physics-based reconstruction methods for magnetic resonance imaging." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2200 (May 10, 2021): 20200196. http://dx.doi.org/10.1098/rsta.2020.0196.

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Conventional magnetic resonance imaging (MRI) is hampered by long scan times and only qualitative image contrasts that prohibit a direct comparison between different systems. To address these limitations, model-based reconstructions explicitly model the physical laws that govern the MRI signal generation. By formulating image reconstruction as an inverse problem, quantitative maps of the underlying physical parameters can then be extracted directly from efficiently acquired k-space signals without intermediate image reconstruction—addressing both shortcomings of conventional MRI at the same time. This review will discuss basic concepts of model-based reconstructions and report on our experience in developing several model-based methods over the last decade using selected examples that are provided complete with data and code. This article is part of the theme issue ‘Synergistic tomographic image reconstruction: part 1’.
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24

King, Kristine. "MRI Physics for Radiologists: A Visual Approach.2nd ed." Radiology 184, no. 3 (September 1992): 676. http://dx.doi.org/10.1148/radiology.184.3.676.

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25

Ahlström, Håkan. "Book Review: MRI Physics for Radiologists. A Visual Approach." Acta Radiologica 37, no. 3P2 (May 1996): 974. http://dx.doi.org/10.1177/02841851960373p2107.

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26

Kyriakides, Polina N. "MRI Physics for Radiologists: A Visual Approach.3rd ed." Radiology 196, no. 3 (September 1995): 778. http://dx.doi.org/10.1148/radiology.196.3.778.

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27

Østergaard, M. "SP0145 Mri: Introduction to Image Acquisition and Basic Physics." Annals of the Rheumatic Diseases 73, Suppl 2 (June 2014): 39.2–39. http://dx.doi.org/10.1136/annrheumdis-2014-eular.6333.

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28

Bogachev, Yu V., A. V. Nikitina, V. V. Frolov, and V. I. Chizhik. "MRI-Guided Therapy." Technical Physics 65, no. 9 (September 2020): 1427–35. http://dx.doi.org/10.1134/s1063784220090078.

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29

Osepchuk, John M., and Ronald C. Petersen. "Alternative MRI limits." Physics World 22, no. 10 (October 2009): 15. http://dx.doi.org/10.1088/2058-7058/22/10/26.

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30

Xiao, Dan, and Bruce J. Balcom. "Hybrid-SPRITE MRI." Journal of Magnetic Resonance 235 (October 2013): 6–14. http://dx.doi.org/10.1016/j.jmr.2013.07.003.

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31

Pessah, Martin E. "Saturation of MRI via parasitic modes." Proceedings of the International Astronomical Union 6, S274 (September 2010): 449–52. http://dx.doi.org/10.1017/s1743921311007460.

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AbstractUnderstanding the physical mechanisms that play a role in the saturation of the magnetorotational instability (MRI) has been an outstanding problem in accretion physics since the early 90's. Here, we present the summary of a study of the parasitic modes that feed off exact viscous, resistive MRI modes. We focus on the situation in which the amplitude of the magnetic field produced by the MRI is such that the instantaneous growth rate of the fastest parasitic mode matches that of the fastest MRI mode. We argue that this "saturation" amplitude provides an estimate of the magnetic field that can be generated by the MRI before the secondary instabilities suppress its growth significantly. We show that there exist two regimes, delimited by a critical Elsasser number of order unity, in which saturation is achieved via secondary instabilities that correspond to either Kelvin-Helmholtz or tearing modes.
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32

Bhallamudi, Vidya Praveen, and P. Chris Hammel. "Nanoscale MRI." Nature Nanotechnology 10, no. 2 (February 2015): 104–6. http://dx.doi.org/10.1038/nnano.2015.7.

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33

Keener, C. "WE-B-ValB-01: Physics Procedures for ACR MRI Accreditation." Medical Physics 33, no. 6Part19 (June 2006): 2227. http://dx.doi.org/10.1118/1.2241673.

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34

Oborn, Bradley M., Stephen Dowdell, Peter E. Metcalfe, Stuart Crozier, Radhe Mohan, and Paul J. Keall. "Future of medical physics: Real‐time MRI‐guided proton therapy." Medical Physics 44, no. 8 (July 4, 2017): e77-e90. http://dx.doi.org/10.1002/mp.12371.

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35

Sasaki, Y., E. Hayata, T. Tanaka, H. Ito, and T. Mizusaki. "Construction of ULT-MRI cryostat for ultra low temperature physics." Journal of Low Temperature Physics 138, no. 3-4 (February 2005): 911–16. http://dx.doi.org/10.1007/s10909-005-2324-x.

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36

Arsat, Zainal Abidin, A. Halim Kadarman, Amran Ahmed Shokri, Mohd Ezane Aziz, and Solehuddin Shuib. "Evaluation of MRI images’ pixels intensity in three different MRI sequences." Journal of Physics: Conference Series 1529 (April 2020): 022010. http://dx.doi.org/10.1088/1742-6596/1529/2/022010.

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37

Coffey, Aaron M., Milton L. Truong, and Eduard Y. Chekmenev. "Low-field MRI can be more sensitive than high-field MRI." Journal of Magnetic Resonance 237 (December 2013): 169–74. http://dx.doi.org/10.1016/j.jmr.2013.10.013.

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38

Neeman, Michal. "Perspectives: MRI of angiogenesis." Journal of Magnetic Resonance 292 (July 2018): 99–105. http://dx.doi.org/10.1016/j.jmr.2018.04.008.

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39

Ilott, Andrew J., S. Chandrashekar, Andreas Klöckner, Hee Jung Chang, Nicole M. Trease, Clare P. Grey, Leslie Greengard, and Alexej Jerschow. "Visualizing skin effects in conductors with MRI: 7Li MRI experiments and calculations." Journal of Magnetic Resonance 245 (August 2014): 143–49. http://dx.doi.org/10.1016/j.jmr.2014.06.013.

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40

Hachiya, Mahiro, Kyohei Arimura, Tomohiro Ueno, and Akira Matsubara. "Development of MRI Microscope." Journal of Low Temperature Physics 158, no. 3-4 (August 21, 2009): 697–703. http://dx.doi.org/10.1007/s10909-009-9939-2.

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41

Poudel, Parashu Ram. "Physics in Medical Science." Himalayan Physics 2 (July 31, 2011): 43–46. http://dx.doi.org/10.3126/hj.v2i2.5210.

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The domain of Physics covers vast area of scientific knowledge. Basic research on assemblies of atomic or nuclear radiation and gyromagnetic moments led to powerful technique for studying molecular structure as well as solid lattices. It led to invention and development of modern medical diagnostic and theraputic tools which have revolutionized the medical practices. Advancement in medical researches as seen today will be well-nigh impossible without the use of the finding of Physics. The funding made on Physics is in fact another way of funding made on human health.Keywords: Radioactivity; Crystallography; Radioimmune assay; MRI; CAT; PETThe Himalayan PhysicsVol.2, No.2, May, 2011Page: 43-46Uploaded Date: 1 August, 2011
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42

Roberts, T. "TU-C-330A-01: The History (and Future) of MRI Physics." Medical Physics 33, no. 6Part16 (June 2006): 2182. http://dx.doi.org/10.1118/1.2241493.

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43

Bell, R. "TU-A-211-02: Nuts and Bolts of MRI Physics Testing." Medical Physics 39, no. 6Part22 (June 2012): 3883. http://dx.doi.org/10.1118/1.4735853.

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44

Tubridy, N., and C. S. McKinstry. "Neuroradiological history: Sir Joseph Larmor and the basis of MRI physics." Neuroradiology 42, no. 11 (November 30, 2000): 852–55. http://dx.doi.org/10.1007/s002340000400.

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45

Ward, Bryan K., Dale C. Roberts, Jorge Otero-Millan, and David S. Zee. "A decade of magnetic vestibular stimulation: from serendipity to physics to the clinic." Journal of Neurophysiology 121, no. 6 (June 1, 2019): 2013–19. http://dx.doi.org/10.1152/jn.00873.2018.

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For many years, people working near strong static magnetic fields of magnetic resonance imaging (MRI) machines have reported dizziness and sensations of vertigo. The discovery a decade ago that a sustained nystagmus can be observed in all humans with an intact labyrinth inside MRI machines led to a possible mechanism: a Lorentz force occurring in the labyrinth from the interactions of normal inner ear ionic currents and the strong static magnetic fields of the MRI machine. Inside an MRI, the Lorentz force acts to induce a constant deflection of the semicircular canal cupula of the superior and lateral semicircular canals. This inner ear stimulation creates a sensation of rotation, and a constant horizontal/torsional nystagmus that can only be observed when visual fixation is removed. Over time, the brain adapts to both the perception of rotation and the nystagmus, with the perception usually diminishing over a few minutes, and the nystagmus persisting at a reduced level for hours. This observation has led to discoveries about how the central vestibular mechanisms adapt to a constant vestibular asymmetry and is a useful model of set-point adaptation or how homeostasis is maintained in response to changes in the internal milieu or the external environment. We review what is known about the effects of stimulation of the vestibular system with high-strength magnetic fields and how the understanding of the mechanism has been refined since it was first proposed. We suggest future ways that magnetic vestibular stimulation might be used to understand vestibular disease and how it might be treated.
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46

Cirilli, Manuela. "From particle physics: To medtech and biomedical research." Europhysics News 49, no. 5-6 (September 2018): 35–38. http://dx.doi.org/10.1051/epn/2018507.

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Physics phenomena underpin many techniques and technologies that are used for both diagnosis and treatment of a variety of diseases. This is the case for radiotherapy, Magnetic Resonance Imaging (MRI), and Positron Emission Tomography (PET) that are based on our knowledge, respectively, of how particles interact with matter, of how atomic nuclei behave in oscillating magnetic fields, and of how positron decay.
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47

McGrath, Cormac. "Virtual reality MRI." Physica Medica 52 (August 2018): 169–70. http://dx.doi.org/10.1016/j.ejmp.2018.06.030.

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48

Kleppner, Daniel. "Mri for the Third World." Physics Today 45, no. 3 (March 1992): 9–11. http://dx.doi.org/10.1063/1.2809566.

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49

Harris, Margaret. "Scientists attack European MRI rules." Physics World 23, no. 08 (August 2010): 7. http://dx.doi.org/10.1088/2058-7058/23/08/13.

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50

Cartlidge, Edwin. "MRI pioneers share medicine prize." Physics World 16, no. 11 (November 2003): 6. http://dx.doi.org/10.1088/2058-7058/16/11/5.

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