منابع مشابه
Motion-Correction Enabled Ultra-High Resolution In-Vivo 7T-MRI of the Brain
OBJECTIVES To demonstrate the image quality that can be obtained for multiple contrasts using ultra-high resolution MRI (highest nominal resolution: 350 μm isotropic) at 7T using appropriate motion-correction. MATERIALS AND METHODS An MRI-based fat-excitation motion navigator (which requires no additional hardware) was incorporated into T1-weighted (MP2RAGE, 350 μm nominal isotropic resolutio...
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UNLABELLED Respiratory and cardiac motion is the most serious limitation to whole-body PET, resulting in spatial resolution close to 1 cm. Furthermore, motion-induced inconsistencies in the attenuation measurements often lead to significant artifacts in the reconstructed images. Gating can remove motion artifacts at the cost of increased noise. This paper presents an approach to respiratory mot...
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European Institute for Molecular Imaging, University of Münster, Münster, Germany We performed continuous, fast acquisitions of 2D MR slices covering the thorax under free breathing. In present work, acquired 2D stacks are re-stored using a respiration signal. The usage of 2D slices is similar to the method described in [1]. The proposed method, however, does not include a navigator and acquisi...
متن کاملAdvanced Motion Correction Methods in PET
With the arrival of increasingly higher resolution PET systems, small amounts of motion can cause significant blurring in the images, compared to the intrinsic resolutions of the scanners. In this work, we have reviewed advanced correction methods for the three cases of (i) unwanted patient motion, as well as motions due to (ii) cardiac and (iii) respiratory cycles. For the first type of ...
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ژورنال
عنوان ژورنال: Physics in Medicine and Biology
سال: 2016
ISSN: 0031-9155,1361-6560
DOI: 10.1088/0031-9155/61/5/r32