Magnetization-prepared IDEAL bSSFP: A flow-independent technique for noncontrast-enhanced peripheral angiography
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چکیده
منابع مشابه
Non-contrast-enhanced Flow-independent Peripheral Angiography with Magnetization-prepared IDEAL Balanced-SSFP
Introduction: Flow-independent angiography can depict vessel morphology without contrast agents and in cases of slow flow, because it relies on only T1, T2 and chemical shift [1]. 3D balanced (b)SSFP sequences are excellent candidates for producing these angiograms [2-4], but the vessel contrast can be compromised by several factors including field inhomogeneity, partial-volume effects, large v...
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Fig. 5. MIP MRA of hands. m1 = 98 mT۠ms/m. Fig. 6. MIP MRA of feet with 3D reformati on. m1= 292 mT۠ms/ m. Fig. 7. MIP MRA of carotids. m1= 28 mT۠ms /m. Fig. 4. MIP of three-station MRA of lower extremities. Major arterial banches are depicted. Minor venous signal are observed in the thigh. Signal loss at pelvis is most likely due to respiratory motion and bowel peristalsis. m1=17-52 mT۠ms/m. Flow-...
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Introduction: Non-contrast-enhanced flow-independent angiography (FIA) exploits intrinsic tissue parameters such as T1, T2 and chemical shift to generate vessel contrast [1]. Unlike flow-dependent methods, FIA can generate stable vessel contrast even with slow flow potentially in the diseased leg. Magnetization-prepared 3D SSFP sequences have been of interest for FIA [2,3], but an important iss...
متن کاملNon-contrast-enhanced flow-independent peripheral MR angiography with balanced SSFP.
Flow-independent angiography is a non-contrast-enhanced technique that can generate vessel contrast even with reduced blood flow in the lower extremities. A method is presented for producing these angiograms with magnetization-prepared balanced steady-state free precession (bSSFP). Because bSSFP yields bright fat signal, robust fat suppression is essential for detailed depiction of the vasculat...
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Background Arterial spin labeled (ASL) 4D MRA has been shown to be a valuable method for simultaneously assessing anatomic structure and dynamic filling of cerebral arteries. Beyond improved SNR and parallel imaging performance, performing these studies at ultrahigh field will benefit from longer T1s resulting in more persistent labeling allowing for improved visualization of distal vessels, es...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2011
ISSN: 1053-1807
DOI: 10.1002/jmri.22479