کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1807245 | 1025250 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Image correction during large and rapid B0 variations in an open MRI system with permanent magnets using navigator echoes and phase compensation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
An open permanent magnet system with vertical B0 field and without self-shielding can be quite susceptible to perturbations from external magnetic sources. B0 variation in such a system located close to a subway station was measured to be greater than 0.7 μT by both MRI and a fluxgate magnetometer. This B0 variation caused image artifacts. A navigator echo approach that monitored and compensated the view-to-view variation in magnetic resonance signal phase was developed to correct for image artifacts. Human brain imaging experiments using a multislice gradient-echo sequence demonstrated that the ghosting and blurring artifacts associated with B0 variations were effectively removed using the navigator method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Magnetic Resonance Imaging - Volume 27, Issue 7, September 2009, Pages 988–993
Journal: Magnetic Resonance Imaging - Volume 27, Issue 7, September 2009, Pages 988–993
نویسندگان
Jianqi Li, Yi Wang, Yu Jiang, Haibin Xie, Gengying Li,