منابع مشابه
Magnetic Resonance Angiography Techniques
■ ■ Contrast-Enhanced Magnetic Resonance Angiography t1 Shortening phase encoding Considerations acquisition timing acquisition timing: test Bolus acquisition timing: Signal Initiated acquisition acquisition timing: Dynamic Subtraction Contrast-enhanced Magnetic resonance angiography Imaging parameters advantages of Contrast-enhanced Magnetic resonance angiography Limitations of Contrast-enhanc...
متن کاملCoronary magnetic resonance angiography.
Coronary magnetic resonance angiography (MRA) is a powerful noninvasive technique with high soft-tissue contrast for the visualization of the coronary anatomy without X-ray exposure. Due to the small dimensions and tortuous nature of the coronary arteries, a high spatial resolution and sufficient volumetric coverage have to be obtained. However, this necessitates scanning times that are typical...
متن کاملMagnetic Resonance Angiography Techniques
68 Introduction MR Imaging (MRI) depends on relaxation times T1 and T2 and spin density r. Furthermore, MRI is very sensitive to motion resulting in a variety of flow effects. On one hand, flow effects are responsible for a number of artifacts which can drastically impair the diagnostic value of the images; on the other hand, flow effects can be used advantageously to develop non-invasive techn...
متن کاملCoronary magnetic resonance angiography: technical developments and clinical applications.
Magnetic resonance angiography (MRA) is a promising method for noninvasive coronary artery imaging. The interesting features of coronary MRA are its non-invasive nature, the absence of ionizing radiation, and the possibility of imaging the coronary arteries without exogenous contrast. Moreover, three-dimensional volume information and tomographic image planes in any direction can be obtained. T...
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ژورنال
عنوان ژورنال: Journal of Vascular Surgery
سال: 1994
ISSN: 0741-5214
DOI: 10.1016/s0741-5214(94)91000-6