کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5491358 1525002 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
RF slice profile effects in magnetic resonance fingerprinting
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
RF slice profile effects in magnetic resonance fingerprinting
چکیده انگلیسی
The radio frequency (RF) slice profile effects on T1 and T2 estimation in magnetic resonance fingerprinting (MRF) are investigated with respect to time-bandwidth product (TBW), flip angle (FA) level and field inhomogeneities. Signal evolutions are generated incorporating the non-ideal slice selective excitation process using Bloch simulation and matched to the original dictionary with and without the non-ideal slice profile taken into account. For validation, phantom and in vivo experiments are performed at 3T. Both simulations and experiments results show that T1 and T2 error from non-ideal slice profile increases with increasing FA level, off-resonance, and low TBW values. Therefore, RF slice profile effects should be compensated for accurate determination of the MR parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Magnetic Resonance Imaging - Volume 41, September 2017, Pages 73-79
نویسندگان
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