By Peter G. Danias MD, PhD (auth.)
Cardiovascular magnetic resonance imaging (CMR) has turn into a necessary a part of noninvasive diagnostic cardiac imaging. a pragmatic consultant for Cardiovascular Magnetic Resonance Imaging presents a complete and reader-friendly academic device for physicians commencing to paintings with CMR and cardiology and radiology trainees getting ready for the Board certification exam. beautiful to trainees, this article conveys educating issues with a number of selection questions which are supported by means of concise reviews, supplying a whole rationalization of the right kind solution and pertinent up to date bibliography. circumstances handle a wide spectrum of scientific difficulties, together with ischemic, valvular, myopathic, pericardial, aortic and congenital center diseases.
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Additional info for Cardiovascular MRI: 150 Multiple Choice Questions and Answers
J Cardiovasc Magn Reson, 2006;8(3):503–507. 17. Ley S, Eichhorn J, Ley-Zaporozhan J, et al. Evaluation of aortic regurgitation in congenital heart disease: value of MR imaging in comparison to echocardiography. Pediatr Radiol, 2007;37(5):426–436. 18. Marcu CB, Beek AM, and van Rossum AC. Clinical applications of cardiovascular magnetic resonance imaging. Cmaj, 2006;175(8):911–917. 19. Danias PG, Stuber M, McConnell MV, and Manning WJ. The diagnosis of congenital coronary anomalies with magnetic resonance imaging.
The aortic valve is trileaflet and the three cusps are labeled in Fig. 14 (L, left; R, right; NC, noncoronary). There is restriction of the excursion of the leaflets, evident by the small area of the orifice (Fig. 14B, whited out area in the systolic frame). In both frames, there is signal loss at the site of coaptation of the three leaflets (Fig. 14A, arrows) suggesting degenerative changes and calcification of the commissures. CMR planimetry of the aortic valve orifice has been shown to provide an accurate estimation of the degree of aortic valve stenosis [26, 27], although some have reported overestimation of the valve area with CMR .
The exposure to ionizing radiation with CMR is more than with a single chest X-ray, but considerably less than that of a chest computed tomography (CT) scan B. The exposure to ionizing radiation with CMR is more than with a Tc-99 m myocardial perfusion single-photon emission computed tomography (SPECT) study, but considerably less than that of a TL-201 planar study C. Because of high spatial and temporal resolution, CMR is better than echocardiography for evaluation of small and highly mobile structures D.