TY - JOUR
T1 - Advanced metal artifact reduction MRI of metal-on-metal hip resurfacing arthroplasty implants
T2 - compressed sensing acceleration enables the time-neutral use of SEMAC
AU - Fritz, Jan
AU - Fritz, Benjamin
AU - Thawait, Gaurav K.
AU - Raithel, Esther
AU - Gilson, Wesley D.
AU - Nittka, Mathias
AU - Mont, Michael A.
N1 - Funding Information:
Institutional research grant by Siemens Healthcare USA
Funding Information:
This study was funded by Siemens Healthcare (grant number 112627). Jan Fritz received institutional research funds and speaker's honorarium from Siemens Healthcare USA and serves on the scientific advisory board of Siemens Healthcare USA and Alexion Pharmaceuticals, Inc. Benjamin Fritz and Gaurav K Thawait declare no potential conflicts of interest. Esther Raithel is an employee of Siemens Healthcare GmbH. Wesley D Gilson is an employee of Siemens Healthcare USA. Matthias Nittka is an employee of Siemens Healthcare GmbH. Dr Mont is a paid consultant for and receives royalties from Stryker, DJ Orthopaedics, Sage, TissueGene, OnGoing Care Solutions, Microport, Orthosensor, Medical Compression Systems, Johnson & Johnson, Pacira Pharmaceuticals, and Merz.
Publisher Copyright:
© 2016, ISS.
PY - 2016/10/1
Y1 - 2016/10/1
N2 - Objective: Compressed sensing (CS) acceleration has been theorized for slice encoding for metal artifact correction (SEMAC), but has not been shown to be feasible. Therefore, we tested the hypothesis that CS-SEMAC is feasible for MRI of metal-on-metal hip resurfacing implants. Materials and methods: Following prospective institutional review board approval, 22 subjects with metal-on-metal hip resurfacing implants underwent 1.5 T MRI. We compared CS-SEMAC prototype, high-bandwidth TSE, and SEMAC sequences with acquisition times of 4–5, 4–5 and 10–12 min, respectively. Outcome measures included bone-implant interfaces, image quality, periprosthetic structures, artifact size, and signal- and contrast-to-noise ratios (SNR and CNR). Using Friedman, repeated measures analysis of variances, and Cohen’s weighted kappa tests, Bonferroni-corrected p-values of 0.005 and less were considered statistically significant. Results: There was no statistical difference of outcomes measures of SEMAC and CS-SEMAC images. Visibility of implant-bone interfaces and pseudocapsule as well as fat suppression and metal reduction were “adequate” to “good” on CS-SEMAC and “non-diagnostic” to “adequate” on high-BW TSE (p < 0.001, respectively). SEMAC and CS-SEMAC showed mild blur and ripple artifacts. The metal artifact size was 63 % larger for high-BW TSE as compared to SEMAC and CS-SEMAC (p < 0.0001, respectively). CNRs were sufficiently high and statistically similar, with the exception of CNR of fluid and muscle and CNR of fluid and tendon, which were higher on intermediate-weighted high-BW TSE (p < 0.005, respectively). Conclusion: Compressed sensing acceleration enables the time-neutral use of SEMAC for MRI of metal-on-metal hip resurfacing implants when compared to high-BW TSE and image quality similar to conventional SEMAC.
AB - Objective: Compressed sensing (CS) acceleration has been theorized for slice encoding for metal artifact correction (SEMAC), but has not been shown to be feasible. Therefore, we tested the hypothesis that CS-SEMAC is feasible for MRI of metal-on-metal hip resurfacing implants. Materials and methods: Following prospective institutional review board approval, 22 subjects with metal-on-metal hip resurfacing implants underwent 1.5 T MRI. We compared CS-SEMAC prototype, high-bandwidth TSE, and SEMAC sequences with acquisition times of 4–5, 4–5 and 10–12 min, respectively. Outcome measures included bone-implant interfaces, image quality, periprosthetic structures, artifact size, and signal- and contrast-to-noise ratios (SNR and CNR). Using Friedman, repeated measures analysis of variances, and Cohen’s weighted kappa tests, Bonferroni-corrected p-values of 0.005 and less were considered statistically significant. Results: There was no statistical difference of outcomes measures of SEMAC and CS-SEMAC images. Visibility of implant-bone interfaces and pseudocapsule as well as fat suppression and metal reduction were “adequate” to “good” on CS-SEMAC and “non-diagnostic” to “adequate” on high-BW TSE (p < 0.001, respectively). SEMAC and CS-SEMAC showed mild blur and ripple artifacts. The metal artifact size was 63 % larger for high-BW TSE as compared to SEMAC and CS-SEMAC (p < 0.0001, respectively). CNRs were sufficiently high and statistically similar, with the exception of CNR of fluid and muscle and CNR of fluid and tendon, which were higher on intermediate-weighted high-BW TSE (p < 0.005, respectively). Conclusion: Compressed sensing acceleration enables the time-neutral use of SEMAC for MRI of metal-on-metal hip resurfacing implants when compared to high-BW TSE and image quality similar to conventional SEMAC.
KW - Compressed sensing
KW - Hip
KW - MARS
KW - MRI
KW - Metal-on-metal
KW - Resurfacing arthroplasty
KW - SEMAC
KW - Sparsity
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U2 - 10.1007/s00256-016-2437-0
DO - 10.1007/s00256-016-2437-0
M3 - Article
C2 - 27497594
AN - SCOPUS:84982903320
SN - 0364-2348
VL - 45
SP - 1345
EP - 1356
JO - Skeletal Radiology
JF - Skeletal Radiology
IS - 10
ER -