Metal artifact reduction MRI of total ankle arthroplasty implants.

MedStar author(s):
Citation: European Radiology. , 2017 Dec 07PMID: 29218618Institution: MedStar Union Memorial HospitalDepartment: Orthopaedic SurgeryForm of publication: Journal ArticleMedline article type(s): Journal ArticleSubject headings: IN PROCESS -- NOT YET INDEXEDYear: 2017Local holdings: Available online from MWHC library: 1997 - presentISSN:
  • 0938-7994
Name of journal: European radiologyAbstract: CONCLUSIONS: MRI of TAA implants with CS-SEMAC improves the diagnosis of interface osteolysis, periprosthetic bone marrow oedema, fractures and tendinopathy when compared to high-BW TSE, and has a positive effect on patient management.KEY POINTS: * High-bandwidth TSE and compressed sensing SEMAC improve MRI of ankle arthroplasty implants. * Compressed sensing SEMAC improves bone-implant interfaces, periprosthetic bone, tendons and joint capsule visibility. * Compressed sensing SEMAC improves the diagnosis of osteolysis, tendinopathy, fractures and synovitis. * MRI decreases the number of clinical differential diagnoses of painful ankle arthroplasty implants.METHODS: Following institutional approval and consent, 40 subjects with TAA implants underwent 1.5-T MRI prospectively. Evaluations included bone-implant interfaces, anatomical structures, abnormal findings and differential diagnoses before and after MRI. AUCs of P-P plots were used to determine superiority. Statistical differences were evaluated with McNemar and chi-square tests. P-values <= 0.05 were considered significant.OBJECTIVES: To assess high-bandwidth and compressed sensing-(CS)-SEMAC turbo spin echo (TSE) techniques for metal artifact reduction MRI of total ankle arthroplasty (TAA) implants.RESULTS: CS-SEMAC TSE was superior to high-bandwidth TSE in showing the bone-implant interfaces (AUC=0.917), periprosthetic bone, tendons and joint capsule (AUC=0.337-0.766), bone marrow oedema (43 % difference, p=0.041), interface osteolysis (63 %, p=0.015), tendinopathy (62 %, p=0.062), periprosthetic fractures (60 %, p=0.250), synovitis (43 %, p=0.250), as well as reader confidence for bone marrow oedema (p=<0.001), fracture (p=0.001), interface osteolysis (p=0.003), synovitis (p=0.027) and tendinopathy (p=0.034). The number of differential diagnoses in symptomatic subjects after the MRI with CS-SEMAC decreased from 3 (1-4) to 1 (1-2) (p<0.001).All authors: de Cesar Netto C, Fonseca LF, Fritz B, Fritz J, Nittka M, Raithel E, Schon LC, Stern SEFiscal year: FY2018Digital Object Identifier: Date added to catalog: 2017-12-12
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Item type Current library Collection Call number Status Date due Barcode
Journal Article MedStar Authors Catalog Article 29218618 Available 29218618

Available online from MWHC library: 1997 - present

CONCLUSIONS: MRI of TAA implants with CS-SEMAC improves the diagnosis of interface osteolysis, periprosthetic bone marrow oedema, fractures and tendinopathy when compared to high-BW TSE, and has a positive effect on patient management.

KEY POINTS: * High-bandwidth TSE and compressed sensing SEMAC improve MRI of ankle arthroplasty implants. * Compressed sensing SEMAC improves bone-implant interfaces, periprosthetic bone, tendons and joint capsule visibility. * Compressed sensing SEMAC improves the diagnosis of osteolysis, tendinopathy, fractures and synovitis. * MRI decreases the number of clinical differential diagnoses of painful ankle arthroplasty implants.

METHODS: Following institutional approval and consent, 40 subjects with TAA implants underwent 1.5-T MRI prospectively. Evaluations included bone-implant interfaces, anatomical structures, abnormal findings and differential diagnoses before and after MRI. AUCs of P-P plots were used to determine superiority. Statistical differences were evaluated with McNemar and chi-square tests. P-values <= 0.05 were considered significant.

OBJECTIVES: To assess high-bandwidth and compressed sensing-(CS)-SEMAC turbo spin echo (TSE) techniques for metal artifact reduction MRI of total ankle arthroplasty (TAA) implants.

RESULTS: CS-SEMAC TSE was superior to high-bandwidth TSE in showing the bone-implant interfaces (AUC=0.917), periprosthetic bone, tendons and joint capsule (AUC=0.337-0.766), bone marrow oedema (43 % difference, p=0.041), interface osteolysis (63 %, p=0.015), tendinopathy (62 %, p=0.062), periprosthetic fractures (60 %, p=0.250), synovitis (43 %, p=0.250), as well as reader confidence for bone marrow oedema (p=<0.001), fracture (p=0.001), interface osteolysis (p=0.003), synovitis (p=0.027) and tendinopathy (p=0.034). The number of differential diagnoses in symptomatic subjects after the MRI with CS-SEMAC decreased from 3 (1-4) to 1 (1-2) (p<0.001).

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