MRI of Hip Arthroplasties: Comparison of Isotropic Multiacquisition Variable-Resonance Image Combination Selective (MAVRIC SL) Acquisitions With a Conventional MAVRIC SL Acquisition

Zochowski, Kelly C.; Miranda, Mauro A; Cheung, Jacky; Argentieri, Erin C.; Lin, Bin; Kaushik, S. Sivaram; Burge, Alissa J.; Potter, Hollis G.; Koff, Matthew F.

doi:10.2214/ajr.19.21606

Cited by 21 publications

(16 citation statements)

References 19 publications

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“… 27 MAVRIC SL acquisitions reduce magnetic susceptibility artifact by combining data sampled at multiple frequency offsets from the Larmor frequency to capture signal that would otherwise be misregistered. 45 …”

Section: Mr Imaging Techniquementioning

confidence: 99%

“…This also results in improved image quality since unnecessary acquisition of spectral bins that contain little to no signal only contributes to noise and ghosting artifact. 45 The time savings from acquiring fewer spectral bins, as well as from an increased echo train length (ETL) with variable flip-angles, can then be applied to reducing slice thickness, allowing for an isotropic sequence that can be reformatted into other planes. 45 …”

Section: Mr Imaging Techniquementioning

confidence: 99%

“… 45 The time savings from acquiring fewer spectral bins, as well as from an increased echo train length (ETL) with variable flip-angles, can then be applied to reducing slice thickness, allowing for an isotropic sequence that can be reformatted into other planes. 45 …”

Section: Mr Imaging Techniquementioning

confidence: 99%

See 2 more Smart Citations

The Utility of Isotropic 3D Magnetic Resonance Imaging in Assessing Painful Total Ankle Replacements

Lin

Sofka

Demetracopoulos

et al. 2022

Foot & Ankle Orthopaedics

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Section: Mr Imaging Techniquementioning

confidence: 99%

Section: Mr Imaging Techniquementioning

confidence: 99%

See 1 more Smart Citation

The Utility of Isotropic 3D Magnetic Resonance Imaging in Assessing Painful Total Ankle Replacements

Lin

Sofka

Demetracopoulos

et al. 2022

Foot & Ankle Orthopaedics

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“…Recent technical advances in the MAVRIC sequence now permit isotropic acquisition within a reasonable clinical scan time, allowing multiplanar reformatting of acquired images. [23][24][25] MR Imaging Evaluation…”

Section: Metal Suppressionmentioning

confidence: 99%

Advanced Magnetic Resonance Imaging in Osteoarthritis

Burge

Jawetz

2020

Semin Musculoskelet Radiol

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Osteoarthritis (OA) is one of the most common causes of disability throughout the world. Current therapeutic strategies are aimed at preventing the development and delaying the progression of OA, as well as repairing or replacing worn articular surfaces, because the regeneration of lost hyaline articular cartilage is not currently a clinically feasible option. Imaging is useful in formulating treatment strategies in patients at risk for OA, allowing assessment of risk factors, the degree of preexisting tissue damage, and posttreatment monitoring. Magnetic resonance imaging (MRI), in particular, provides in-depth evaluation of these patients, with optimal clinical sequencing allowing sensitive assessment of chondral signal and morphology, and the addition of advanced MRI techniques facilitating comprehensive evaluation of joint health, with increased sensitivity for changes in articular cartilage and surrounding joint tissues.

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“…MRI has been used to describe soft tissue changes around hip arthroplasty implants, in particular the appearance of bone loss 7 aseptic lymphocytic vasculitis-associated lesions and synovitis. 8 , 9 However, the use of MRI to investigate problematic TKA is less well studied.…”

Section: Introductionmentioning

confidence: 99%

Quantification of intra-articular fibrosis in patients with stiff knee arthroplasties using metal-reduction MRI

Attard

Self

et al. 2020

The Bone & Joint Journal

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Aims Stiffness is a common complication after total knee arthroplasty (TKA). Pathogenesis is not understood, treatment options are limited, and diagnosis is challenging. The aim of this study was to investigate if MRI can be used to visualize intra-articular scarring in patients with stiff, painful knee arthroplasties. Methods Well-functioning primary TKAs (n = 11), failed non-fibrotic TKAs (n = 5), and patients with a clinical diagnosis of fibrosis 1 (n = 8) underwent an MRI scan with advanced metal suppression (Slice Encoding for Metal Artefact Correction, SEMAC) with gadolinium contrast. Fibrotic tissue (low intensity on T1 and T2, low-moderate post-contrast enhancement) was quantified (presence and tissue thickness) in six compartments: supra/infrapatella, medial/lateral gutters, and posterior medial/lateral. Results Fibrotic tissue was identified in all patients studied. However, tissue was significantly thicker in fibrotic patients (4.4 mm ± 0.2 mm) versus non-fibrotic (2.5 mm ± 0.4 mm) and normal TKAs (1.9 mm ± 0.2 mm, p = < 0.05). Significant (> 4 mm thick) tissue was seen in 26/48 (54%) of compartments examined in the fibrotic group, compared with 17/30 (57%) non-fibrotic, and 10/66 (15%) normal TKAs. Although revision surgery did improve range of movement (ROM) in all fibrotic patients, clinically significant restriction remained post-surgery. Conclusion Stiff TKAs contain intra-articular fibrotic tissue that is identifiable by MRI. Studies should evaluate whether MRI is useful for surgical planning of debridement, and as a non-invasive measurement tool following interventions for stiffness caused by fibrosis. Revision for stiffness can improve ROM, but outcomes are sub-optimal and new treatments are required. Cite this article: Bone Joint J 2020;102-B(10):1331–1340.

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MRI of Hip Arthroplasties: Comparison of Isotropic Multiacquisition Variable-Resonance Image Combination Selective (MAVRIC SL) Acquisitions With a Conventional MAVRIC SL Acquisition

Cited by 21 publications

References 19 publications

The Utility of Isotropic 3D Magnetic Resonance Imaging in Assessing Painful Total Ankle Replacements

The Utility of Isotropic 3D Magnetic Resonance Imaging in Assessing Painful Total Ankle Replacements

Advanced Magnetic Resonance Imaging in Osteoarthritis

Quantification of intra-articular fibrosis in patients with stiff knee arthroplasties using metal-reduction MRI

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