Usefullness of Low MTC RF Power for 3D-TOF MRA Using a Slice-Selective Off Resonance Sinc Pulse(SORS)Technique
نویسندگان
چکیده
منابع مشابه
Rapid RF Field Mapping Using a Slice-Selective Pre-conditioning RF Pulse
Introduction: In MRI, radiofrequency (RF) field (B1) inhomogeneity can produce flip angle variations, which can ultimately lead to signal intensity variations and quantitative measurement errors. By independently calibrating the local spatial variation of B1, the RFrelated signal variations can be corrected. The most widely used B1 mapping method is the double angle method (DAM) [1], which uses...
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PURPOSE The in-stent signal reduction of the stented artery caused by susceptibility artifact or radiofrequency shielding artifact limited the use of time-of-flight MR angiography (TOF-MRA) as a follow-up tool after intracranial stenting. We showed the degree of an artifact according to different stent types, and optimized MR parameters for TOF-MRA in patients with intracranial stent on 3.0 T M...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1998
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00001351814