Reduction of Metal Artifacts in Patients with Total Hip Arthroplasty with Slice-encoding Metal Artifact Correction and View-Angle Tilting MR Imaging

Sutter, Reto; Ulbrich, Erika J.; Jellúš, Vladimı́r; Nittka, Mathias; Pfirrmann, Christian W. A.

doi:10.1148/radiol.12112408

Cited by 143 publications

(100 citation statements)

References 27 publications

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“…To date, no study has directly compared these two tests to assess their validity in assessing asymptomatic patients with MOM THAs for adverse reactions and pseudotumors. We therefore directly compared the two, using an MRI acquisition technique (SEMAC) that has shown significant advantages over conventional MARS techniques in the presence of metallic implants [7,18,21,27]. We also compared ultrasound to MRI for preliminary assessment of pseudotumor growth and progressive soft tissue involvement at a 6-month interval.…”

Section: Discussionmentioning

confidence: 99%

“…The use of thinner slices can also reduce slice distortion. More recent MSI techniques (SEMAC, MAVRIC, warp) build on MARS by adding additional scan time to dramatically reduce slice direction displacement artifacts [7,18,21,27]. There are numerous other approaches to artifact reduction in MRI, and like the methods referenced here, these continue to be refined and improved.…”

Section: Discussionmentioning

confidence: 99%

“…A number of different metal artifact reduction MRI approaches are available with different tradeoffs between scan time and artifact reduction. More recently, multispectral imaging (MSI) methods (slice encoding for metal artifact correction [SEMAC], multiacquisition variable-resonance image combination [MAVRIC], warp) have been developed to further reduce displacement artifacts in both slice and in-plane directions [7,18,21,27]. The main downsides of these approaches are increased scan times and reduced resolution and signal-to-noise ratio compared with standard clinical MRI.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The John Charnley Award: Diagnostic Accuracy of MRI Versus Ultrasound for Detecting Pseudotumors in Asymptomatic Metal-on-Metal THA

Garbuz

Hargreaves

Duncan

et al. 2013

Clin Orthop Relat Res

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Background The prevalence of pseudotumors in patients with large-head metal-on-metal (MOM) THA has been the subject of implant recalls and warnings from various regulatory agencies. To date, there is no consensus on whether ultrasound or MRI is superior for the detection of pseudotumors. Questions/purposes We prospectively compared ultrasound to MRI for pseudotumor detection in an asymptomatic cohort of patients with MOM THAs. We also compared ultrasound to MRI for assessment of pseudotumor growth and progressive soft tissue involvement at a 6-month interval. Methods We enrolled 40 patients with large-head MOM THAs in the study. The mean age was 54 years (range, 34-76 years). The mean time from surgery was 54 months (range, 40-81 months). There were 28 men and 12 women. All patients underwent ultrasound and MRI using slice encoding for metal artifact correction. The gold standard was defined as follows: if both ultrasound and MRI agreed, this was interpreted as concordant and the result was considered accurate. (Toronto, Ontario, Canada). The institution of one or more of the authors (BAH) has received, during the study period, funding from GE Healthcare (Waukesha, WI, USA) and the NIH (Bethesda, MD, USA). One of the authors (DSG) certifies that he or she has received or may receive payments or benefits, during the study period, an amount of USD 10,000 to USD 100,000 from Zimmer, Inc. One of the authors (CPD) certifies that he or she has received or may receive payments or benefits, during the study period, an amount of USD 10,000 to USD 100,000 from Zimmer, Inc, and an amount of USD 10,000 to USD 100,000 from DePuy Synthes Canada Ltd. One of the authors (BAM) certifies that he or she has received or may receive payments or benefits, during the study period, an amount of USD 10,000 to USD 100,000 from Zimmer, Inc. The remaining authors (BAH, DFW, BBF) certify that they have no commercial associations (eg, consultancies, stock ownership, equity interest, patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article. All ICMJE Conflict of Interest Forms for authors and Clinical Orthopaedics and Related Research editors and board members are on file with the publication and can be viewed on request. Clinical Orthopaedics and Related Research neither advocates nor endorses the use of any treatment, drug, or device. Readers are encouraged to always seek additional information, including FDA approval status, of any drug or device before clinical use. Each author certifies that the human protocol for this investigation was approved by the appropriate ethics committee at his or her institution, that all investigations were conducted in conformity with the ethical principles of research, and that informed consent for participation in the study was obtained. This work was performed at the Departments of Orthopaedics and Radiology, University of British Columbia (Vancouver, British Columbia, Canada) and at Vancouver General Hospital (Vancouver, British Columbia...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The John Charnley Award: Diagnostic Accuracy of MRI Versus Ultrasound for Detecting Pseudotumors in Asymptomatic Metal-on-Metal THA

Garbuz

Hargreaves

Duncan

et al. 2013

Clin Orthop Relat Res

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“…In contrast to MAVRIC, SEMAC uses one frequency and switch on an additional phase-encoding gradient perpendicular to the z-axis before the readout and sums up the protons in the same phase and thus minimizes the through-plane displacement [37].…”

Section: New Metal Artifact Reduction Sequencementioning

confidence: 99%

CT and MRI Techniques for Imaging Around Orthopedic Hardware

Duong

Sutter

Skornitzke

et al. 2017

Fortschr Röntgenstr

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ZUSAMMENFASSUNGOrthopädische Implantate verringern die Bildqualität in der Schnittbildgebung. Bei steigendem Einsatz von orthopädi-schen Implantaten in einer alternden Bevölkerung ist eine Metallartefaktreduktion von zunehmender Bedeutung. Im folgenden Review möchten wir einen Überblick über die wesentlichen Artefakte in der Computertomografie und Magnetresonanztomografie sowie die neuesten Standards zur Verbesserung der Bildqualität geben. Alle Schritte der Bildakquisition von Gerätewahl über Scanvorbereitungen und -parameter bis hin zur Bildverarbeitung beeinflussen das Ausmaß der Metallartefakte. Technische Fortschritte wie die Dual-energy-Computertomografie mit der Option der Virtuellen monochromatischen Bildgebung sowie neue Implantatmaterialien bieten weitere Möglichkeiten der Metallartefaktreduktion in CT und MRT. Dezidierte MetallartefaktSequenzen beinhalten Algorithmen zur Artefaktreduktion und zur Verbesserung der Bildqualität des umgebenden Gewebes und sind essenzielle Werkzeuge in der orthopä-dischen Bildgebung zur frühzeitigen Detektion von postoperativen Komplikationen. ABSTR AC TOrthopedic hardware impairs image quality in cross-sectional imaging. With an increasing number of orthopedic implants in an aging population, the need to mitigate metal artifacts in computed tomography and magnetic resonance imaging is becoming increasingly relevant. This review provides an overview of the major artifacts in CT and MRI and state-ofthe-art solutions to improve image quality. All steps of image acquisition from device selection, scan preparations and parameters to image post-processing influence the magnitude of metal artifacts. Technological advances like dual-energy CT with the possibility of virtual monochromatic imaging (VMI) and new materials offer opportunities to further reduce artifacts in CT and MRI. Dedicated metal artifact reduction sequences contain algorithms to reduce artifacts and improve imaging of surrounding tissue and are essential tools in orthopedic imaging to detect postoperative complications in early stages.

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“…To set up an imaging protocol with sufficient artifact suppression while maintaining a clinically acceptable scan time is a nontrivial task. Several studies have compared the performance of various sequences in patients with metallic prostheses [9,10,11], but while patient imaging is the ultimate test for…”

Section: Introductionmentioning

confidence: 99%

Phantom based qualitative and quantitative evaluation of artifacts in MR images of metallic hip prostheses

et al. 2015

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Reduction of Metal Artifacts in Patients with Total Hip Arthroplasty with Slice-encoding Metal Artifact Correction and View-Angle Tilting MR Imaging

Abstract: STIR-warp and T1-warp sequences were significantly better according to quantitative and qualitative image criteria, but a clinically relevant artifact reduction was only present for STIR images.

Cited by 143 publications

References 27 publications

The John Charnley Award: Diagnostic Accuracy of MRI Versus Ultrasound for Detecting Pseudotumors in Asymptomatic Metal-on-Metal THA

The John Charnley Award: Diagnostic Accuracy of MRI Versus Ultrasound for Detecting Pseudotumors in Asymptomatic Metal-on-Metal THA

CT and MRI Techniques for Imaging Around Orthopedic Hardware

Phantom based qualitative and quantitative evaluation of artifacts in MR images of metallic hip prostheses

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