Accelerated slice encoding for metal artifact correction
نویسندگان
چکیده
منابع مشابه
Accelerated slice encoding for metal artifact correction.
PURPOSE To demonstrate accelerated imaging with both artifact reduction and different contrast mechanisms near metallic implants. MATERIALS AND METHODS Slice-encoding for metal artifact correction (SEMAC) is a modified spin echo sequence that uses view-angle tilting and slice-direction phase encoding to correct both in-plane and through-plane artifacts. Standard spin echo trains and short-TI ...
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...
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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 ...
متن کاملNoise Considerations in Slice Encoding for Metal Artifact Correction
Fig. 2: Illustration of the correction of throughplane distortions. The SEMAC sequence excites multiple slices with no gap in between and resolves the arbitrary distorted excitation slice profiles with the additional z-phase encoding. The correction is done by combining the signals resolved from different slices at each voxel, but many of which only contain background noise. Noise Consideration...
متن کاملSEMAC: 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...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2010
ISSN: 1053-1807,1522-2586
DOI: 10.1002/jmri.22112