Compressed Sensing SEMAC: 8-fold Accelerated High Resolution Metal Artifact Reduction MRI of Cobalt-Chromium Knee Arthroplasty Implants

Fritz, Jan; Ahlawat, Shivani; Demehri, Shadpour; Thawait, Gaurav K.; Raithel, Esther; Gilson, Wesley D.; Nittka, Mathias

doi:10.1097/rli.0000000000000317

Cited by 77 publications

(62 citation statements)

References 30 publications

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“…However, in the case of SEMAC-STIR, artifact reduction resulted in 75% increased acquisition time. Therefore, further acceleration techniques such as compressed sensing for the SEMAC sequence are desirable 25 to facilitate the clinical applicability of this technique. In contrast, MSVAT-SPACE-STIR significantly reduced overall artifact volume and decreased acquisition time by 57% compared with SPACE-STIR.…”

Section: Discussionmentioning

confidence: 99%

MSVAT-SPACE-STIR and SEMAC-STIR for Reduction of Metallic Artifacts in 3T Head and Neck MRI

Hilgenfeld

Prager

Schwindling

et al. 2018

AJNR Am J Neuroradiol

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Regarding susceptibility artifacts and acquisition time, MSVAT-SPACE-STIR might be advantageous over SPACE-STIR for high-resolution and isotropic head and neck imaging. Only for materials with high-susceptibility differences to soft tissue, the use of SEMAC-STIR might be beneficial. Within limited acquisition times, SEMAC-STIR cannot exploit its full advantage over TSE-STIR regarding artifact suppression.

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Section: Discussionmentioning

confidence: 99%

MSVAT-SPACE-STIR and SEMAC-STIR for Reduction of Metallic Artifacts in 3T Head and Neck MRI

Hilgenfeld

Prager

Schwindling

et al. 2018

AJNR Am J Neuroradiol

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“…However, MRI acquisitions of seven minutes are routine for imaging the whole brain (e.g., 3D T1W MRIs). In addition, accelerated O-MAR acquisitions were recently demonstrated using compressed sensing to significantly reduce the acquisition time [ 23 ].…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance imaging metal artifact reduction for eye plaque patient with dental braces

Gach¹,

Mackey²,

Rehman³

et al. 2017

jcb

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PurposeTo determine if metal artifact reduction can minimize magnetic susceptibility artifacts in the orbits for an eye plaque brachytherapy patient with metallic dental braces.Material and methodsA 62-year-old female patient with a choroidal melanoma in the right eye received a 1.5 T magnetic resonance imaging (MRI) simulation for 3D eye plaque brachytherapy planning. The protocol included conventional 3D T1-weighted and 2D T2-weighted MRIs. A vendor-supplied T2-weighted metal artifact reduction sequence was added to the protocol to reduce magnetic susceptibility artifacts from the metallic dental braces. The metal artifact reduction sequence combined turbo spin echo acquisitions, high RF excitation and readout bandwidths, and view angle tilting and slice encoding for metal artifact correction with z-shimming to correct in-plane and through-plane image distortions, respectively.ResultsDental braces caused significant signal loss and image distortion in the orbits on the conventional T1-weighted and T2-weighted MRIs, and the MRIs were unusable for treatment planning. The metal artifact reduction sequence with 13 z-phase encodes minimized distortion and signal loss in the orbits, allowing the tumor to be clearly delineated.ConclusionsT2-weighted MRI with metal artifact reduction was successfully applied to minimize artifacts in the orbits resulting from the dental braces, thus allowing the MRIs to be used in 3D brachytherapy treatment planning.

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“…For instance, the multi-acquisition variable-resonance image combination (MAVRIC) sequence directly uses 3D excitation and 3D readout pulses. 11,26 Slice encoding for metal artifact correction (SEMAC), in contrast, uses a 2D excitation pulse with a 3D readout pulse. 11 These sequences have been shown to reduce hardware artifact markedly when compared with traditional techniques to reduce metal artifact (e.g., using FSE sequences and increasing receiver bandwidth).…”

Section: Metal Artifact Suppressionmentioning

confidence: 99%

“…The long acquisition time required is the primary limitation of this technique, although new acceleration techniques using compressed sensing can substantially reduce imaging times. 26…”

Section: Metal Artifact Suppressionmentioning

confidence: 99%

“…evolve, these advanced imaging techniques should become more practical in a clinical workflow. 12,17,[21][22][23][24][25][26][27] In this review, we discuss 3D MRI sequences currently available for the knee, as well as the advantages and limitations of 3D MRI relative to routine 2D knee MRI. We also describe emerging techniques for 3D MRI, including acceleration and automated quantification techniques.…”

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confidence: 99%

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3D MRI of the Knee

Altahawi

Pierce

Aslan

et al. 2021

Semin Musculoskelet Radiol

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Three-dimensional (3D) magnetic resonance imaging (MRI) of the knee is widely used in musculoskeletal (MSK) imaging. Currently, 3D sequences are most commonly used for morphological imaging. Isotropic 3D MRI provides higher out-of-plane resolution than standard two-dimensional (2D) MRI, leading to reduced partial volume averaging artifacts and allowing for multiplanar reconstructions in any plane with any thickness from a single high-resolution isotropic acquisition. Specifically, isotropic 3D fast spin-echo imaging, with options for tissue weighting similar to those used in multiplanar 2D FSE imaging, is of particular interest to MSK radiologists. New applications for 3D spatially encoded sequences are also increasingly available for clinical use. These applications offer advantages over standard 2D techniques for metal artifact reduction, quantitative cartilage imaging, nerve imaging, and bone shape analysis. Emerging fast imaging techniques can be used to overcome the long acquisition times that have limited the adoption of 3D imaging in clinical protocols.

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Compressed Sensing SEMAC: 8-fold Accelerated High Resolution Metal Artifact Reduction MRI of Cobalt-Chromium Knee Arthroplasty Implants

Cited by 77 publications

References 30 publications

MSVAT-SPACE-STIR and SEMAC-STIR for Reduction of Metallic Artifacts in 3T Head and Neck MRI

MSVAT-SPACE-STIR and SEMAC-STIR for Reduction of Metallic Artifacts in 3T Head and Neck MRI

Magnetic resonance imaging metal artifact reduction for eye plaque patient with dental braces

3D MRI of the Knee

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