3D Non-Contrast MRA of Lower Extremities Using Balanced SSFP with Flow-Sensitive Dephasing (FSD) at 3T
نویسندگان
چکیده
H. GUO, I. ATANASOVA, R. P. LIM, P. STOREY, J. XU, Q. CHEN, H. RUSINEK, Z. FAN, D. LI, AND V. S. LEE DEPARTMENT OF RADIOLOGY, NEW YORK UNIVERSITY SCHOOL OF MEDICINE, NEW YORK, NY, UNITED STATES, COLUMBIA UNIVERSITY, NEW YORK, NY, UNITED STATES, SIEMENS MEDICAL SOLUTIONS USA, INC., MR R&D COLLABORATION, NEW YORK, UNITED STATES, DEPARTMENTS OF RADIOLOGY AND BIOMEDICAL ENGINEERING, NORTHWESTERN UNIVERSITY, CHICAGO, IL, UNITED STATES
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3D Non-Contrast-Enhanced MRA Using Flow-Sensitive Dephasing (FSD) Prepared Balanced SSFP: Identification of the Optimal First-Order Gradient Moment
Introduction: A non-gadolinium-enhanced MRA technique using ECG-triggered 3D balanced SSFP with flow-sensitive dephasing (FSD) preparation has recently been developed and validated in the distal lower extremities of healthy volunteers [1]. The FSD’s first-order gradient moment, m1, is shown to be the most important parameter to determine angiographic quality. A suboptimal m1 may result in venou...
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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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