کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4251212 1283967 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic Resonance-Based Motion Correction for Positron Emission Tomography Imaging
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی رادیولوژی و تصویربرداری
پیش نمایش صفحه اول مقاله
Magnetic Resonance-Based Motion Correction for Positron Emission Tomography Imaging
چکیده انگلیسی

Positron emission tomography (PET) image quality is limited by patient motion. Emission data are blurred owing to cardiac and/or respiratory motion. Although spatial resolution is 4 mm for standard clinical whole-body PET scanners, the effective resolution can be as low as 1 cm owing to motion. Additionally, the deformation of attenuation medium causes image artifacts. Previously, gating has been used to “freeze” the motion, but led to significantly increased noise level. Simultaneous PET/magnetic resonance (MR) modality offers a new way to perform PET motion correction. MR can be used to measure 3-dimensional motion fields, which can then be incorporated into the iterative PET reconstruction to obtain motion-corrected PET images. In this report, we present MR imaging techniques to acquire dynamic images, a nonrigid image registration algorithm to extract motion fields from acquired MR images, and a PET reconstruction algorithm with motion correction. We also present results from both phantom and in vivo animal PET/MR studies. We demonstrate that MR-based PET motion correction using simultaneous PET/MR improves image quality and lesion detectability compared with gating and no motion correction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Seminars in Nuclear Medicine - Volume 43, Issue 1, January 2013, Pages 60–67
نویسندگان
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