MR-Based Attenuation Correction in Brain PET/MR Studies: A Short Review
نویسندگان
چکیده
منابع مشابه
Comparison of state-of-the-art atlas-based bone segmentation approaches from brain MR images for MR-only radiation planning and PET/MR attenuation correction
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 ...
متن کاملImpact of MR-Based Attenuation Correction on Neurologic PET Studies.
UNLABELLED Hybrid PET and MR scanners have become a reality in recent years, with the benefits of reduced radiation exposure, reduction of imaging time, and potential advantages in quantification. Appropriate attenuation correction remains a challenge. Biases in PET activity measurements were demonstrated using the current MR-based attenuation-correction technique. We aimed to investigate the i...
متن کاملImpact of MR based attenuation correction on neurological PET studies
Hybrid positron emission tomography (PET) and magnetic resonance (MR) scanners have become a reality in recent years with the benefits of reduced radiation exposure, reduction of imaging time, and potential advantages in quantification. Appropriate attenuation correction remains a challenge. Biases in PET activity measurements were demonstrated using the current MR based attenuation correction ...
متن کاملAttenuation Effects of MR Headphones During Brain PET/MR Studies.
UNLABELLED PET/MR offers potential advantages over PET/CT that are currently under investigation. One of the challenges of PET/MR is attenuation correction, as there is no simple correlation between MR signal intensity and the attenuation of 511-keV photons detected in PET. Currently, dedicated MR sequences are used to segment voxels into categories that are then assigned a predetermined attenu...
متن کاملDevelopment and Evaluation of a UTE-based Method for Attenuation Correction in MR-PET Neurologic Studies
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...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Diagnostic Imaging in Therapy
سال: 2017
ISSN: 2057-3782
DOI: 10.17229/jdit.2017-0410-028