کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5498322 1533362 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of gradient field nonlinearity distortions in MRI-based attenuation maps for PET reconstruction
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
Effect of gradient field nonlinearity distortions in MRI-based attenuation maps for PET reconstruction
چکیده انگلیسی
Radial distortions of 2 mm at 15 cm radius from the scanner isocentre lead to PET attenuation correction errors smaller than 5%. Keeping the gradient field nonlinearity distortions below this limit can be a reasonable goal for MRI systems used for attenuation correction in PET for quantification purposes. A higher geometrical accuracy may, however, be warranted for quantification of peripheral lesions. These distortions can, e.g., be controlled at acceptance testing and subsequent quality assurance intervals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica Medica - Volume 35, March 2017, Pages 1-6
نویسندگان
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