SEMAC: Slice encoding for metal artifact correction in 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 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 کاملAccelerated 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 ...
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INTRODUCTION: Failed Back Surgery Syndrome (FBSS) is a relatively common complication of lumbar spine surgery, occurring in between 5-10% of cases, and resulting in severe, chronic, and debilitating pain. MRI is often of limited value in these patients due to the significant metal artifact occurring around orthopedic hardware, particularly at higher field strengths (Fig. 1). Slice Encoding for ...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2009
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.21967