Metal artifact correction strategies in MRI-based attenuation correction in PET/MRI
نویسندگان
چکیده
منابع مشابه
SEMAC: Slice Encoding for Metal Artifact Correction in MRI.
Magnetic resonance imaging (MRI) near metallic implants remains an unmet need because of severe artifacts, which mainly stem from large metal-induced field inhomogeneities. This work addresses MRI near metallic implants with an innovative imaging technique called "Slice Encoding for Metal Artifact Correction" (SEMAC). The SEMAC technique corrects metal artifacts via robust encoding of each exci...
متن کاملMetal artifact reduction strategies for improved attenuation correction in hybrid PET/CT imaging.
Metallic implants are known to generate bright and dark streaking artifacts in x-ray computed tomography (CT) images, which in turn propagate to corresponding functional positron emission tomography (PET) images during the CT-based attenuation correction procedure commonly used on hybrid clinical PET/CT scanners. Therefore, visual artifacts and overestimation and/or underestimation of the trace...
متن کاملMRI-based attenuation correction for whole body PET-MRI
UNLABELLED PET/MRI is an emerging dual-modality imaging technology that requires new approaches to PET attenuation correction (AC). We assessed 2 algorithms for whole-body MRI-based AC (MRAC): a basic MR image segmentation algorithm and a method based on atlas registration and pattern recognition (AT&PR). METHODS Eleven patients each underwent a whole-body PET/CT study and a separate multibed...
متن کاملCompressive Slice Encoding for Metal Artifact Correction
Introduction: Slice encoding for metal artifact correction (SEMAC) [1] completely corrects metal-induced in-plane and through-plane distortions. The SEMAC imaging sequence (Fig. 1) augments a view-angle-tilting (VAT) [2] spin echo sequence with z-phase encoding. While the VATcompensation gradient suppresses the in-plane distortions, the throughplane distortions are corrected by combining multip...
متن کاملAdaptive Slice Encoding for Metal Artifact Correction
Introduction: Metallic implants can cause moderate or severe distortion artifacts in MR images depending on the shape, size, composition and orientation of the implant. Recentlyproposed methods correct image distortion due to susceptibility shifts near metallic implants by using excitation of limited bandwidths [1] or limited spatial slices [2], both followed by 3D imaging. Here we demonstrate ...
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ژورنال
عنوان ژورنال: BJR|Open
سال: 2019
ISSN: 2513-9878
DOI: 10.1259/bjro.20190033