Whole-Body PET/MR Imaging: Quantitative Evaluation of a Novel Model-Based MR Attenuation Correction Method Including Bone
نویسندگان
چکیده
منابع مشابه
Clinical Assessment of Emission- and Segmentation-Based MR-Guided Attenuation Correction in Whole-Body Time-of-Flight PET/MR Imaging.
UNLABELLED The joint maximum-likelihood reconstruction of activity and attenuation (MLAA) for emission-based attenuation correction has regained attention since the advent of time-of-flight PET/MR imaging. Recently, we improved the performance of the MLAA algorithm using an MR imaging-constrained gaussian mixture model (GMM). In this study, we compare the performance of our proposed algorithm w...
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In present PET/CT scanners, PET attenuation correction is performed by relying on the information given by CT scan. In the CT-based attenuation correction methods, dual-energy technique (DECT) is the most accurate approach, which has been limited due to the increasing patient dose. In this feasibility study, we have introduced a new method that can implement dual-en...
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Introduction: Magnetic Resonance (MR) imaging has emerged as a valuable tool in radiation treatment (RT) planning as well as Positron Emission Tomography (PET) imaging owing to its superior soft-tissue contrast. Due to the fact that there is no direct transformation from voxel intensity in MR images into electron density, itchr('39')s crucial to generate a pseudo-CT (Computed Tomography) image ...
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Figure 2: Percent-error maps in sagittal, axial, and coronal views (clockwise from top left) of simulated PET images compared to scaled-CT, overlaid on T1-w images for one patient. Panel A shows the error maps for the DUseg method, while Panel B shows the error maps for the R2seg method. Errors with ±1% have been set to 0% to allow for better visualization of larger errors. 2124 Development and...
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ژورنال
عنوان ژورنال: Journal of Nuclear Medicine
سال: 2015
ISSN: 0161-5505,2159-662X
DOI: 10.2967/jnumed.115.156000