The osteoarthritis initiative: report on the design rationale for the magnetic resonance imaging protocol for the knee
By C. Peterfy, E. Schneider, M. Nevitt. Osteoarthritis and Cartilage, 2008
696 citations recorded by the source corpus.
Summary Objectives To report on the process and criteria for selecting acquisition protocols to include in the osteoarthritis initiative (OAI) magnetic resonance imaging (MRI) study protocol for the knee. Methods Candidate knee MR acquisition protocols identified from the literature were first optimized at 3 Tesla (T). Twelve knees from 10 subjects were scanned one time with each of 16 acquisitions considered most likely to achieve the study goals and having the best optimization results. The resultant images and multi-planar reformats were evaluated for artifacts and structural discrimination of articular cartilage at the cartilage–fluid, cartilage–fat, cartilage–capsule, cartilage–meniscus and cartilage–cartilage interfaces. Results The five acquisitions comprising the final OAI MRI protocol were assembled based on the study goals for the imaging protocol, the image evaluation results and the need to image both knees within a 75 min time slot, including positioning. For quantitative cartilage morphometry, fat-suppressed, 3D dual-echo in steady state (DESS) acquisitions appear to provide the best universal cartilage discrimination. Conclusions The OAI knee MRI protocol provides imaging data on multiple articular structures and features relevant to knee OA that will support a broad range of existing and anticipated measurement methods while balancing requirements for high image quality and consistency against the practical considerations of a large multi-center cohort study. Strengths of the final knee MRI protocol include cartilage quantification capabilities in three planes due to multi-planar reconstruction of a thin slice, high spatial resolution 3D DESS acquisition and the multiple, non-fat-suppressed image contrasts measured during the T2 relaxation time mapping acquisition.
Subfields: Rheumatology, Surgery
View Paper: https://www.semanticscholar.org/paper/b9451103ec1c651be306f65e22c1d6c61bc1e130
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Citations in the corpus
- Evolution of semiquantitative whole joint assessment of knee OA: MOAKS (MRI Osteoarthritis Knee Score) (2011, background): “Details of the full OAI pulse sequence protocol and the sequence parameters have been published in detail recently [49].”
- Super-Resolution Musculoskeletal MRI Using Deep Learning (2018, methodology): “31 A total of 176 3D sagittal double echo in steady-state (DESS) data sets from the OAI were used for DeepResolve experiments (relevant scan parameters: FOV 5 14 cm, matrix 5 384 3 307 (zero-filled to 384 3 384), TE/TR 5 5/16 ms, 160 slices with a thickness of 0.7 mm).”