Feasibility and reproducibility of the PsAMRIS-H score for psoriatic arthritis in low-field-strength dedicated extremity magnetic resonance imaging
| Autor: | H. Strube, S Schewe, M. F. Reiser, C. Becker-Gaab, Tobias Saam, Marcus Treitl, Hendrik Schulze-Koops |
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| Rok vydání: | 2013 |
| Předmět: |
Adult
Male medicine.medical_specialty Intraclass correlation Immunology Arthritis Severity of Illness Index Psoriatic arthritis Young Adult Rheumatology Synovitis Finger Joint Severity of illness Immunology and Allergy Medicine Edema Humans Aged Aged 80 and over Reproducibility Tenosynovitis medicine.diagnostic_test business.industry Arthritis Psoriatic Reproducibility of Results Magnetic resonance imaging General Medicine Middle Aged medicine.disease Magnetic Resonance Imaging Disease Progression Feasibility Studies Female Radiology business |
| Zdroj: | Scandinavian journal of rheumatology. 42(5) |
| ISSN: | 1502-7732 |
| Popis: | The psoriatic arthritis magnetic resonance imaging scoring system (PsAMRIS-H) for the evaluation of inflammatory and destructive changes in PsA hands was validated on 0.6-T scanners. The applicability of the PsAMRIS-H on a low-field MRI system as a well-accepted, low-cost imaging modality was evaluated.In 65 consecutive patients (31 males, median age 52 years), 73 scans on a 0.2-T dedicated extremity MRI system were obtained for evaluation of PsA. Images were scored for synovitis, tenosynovitis, periarticular enhancement, bone erosion, bone oedema, and proliferation, and the PsAMRIS-H score was calculated. The intraclass correlation coefficient (ICC) was calculated and the paired t-test conducted.Intra-reader reliability for the total PsAMRIS-H score was good, with an ICC of 0.81 and 0.77 for readers 1 and 2, respectively, and inter-reader agreement was moderate (0.57 for each reader). However, the PsAMRIS-H score differed significantly between the two readers (22 vs. 31; p0.05). When individual components of the PsAMRIS were evaluated, intra- and inter-reader agreement was poor to moderate, especially for tenosynovitis and periarticular inflammation.Low-field 0.2-T MRI is capable of quantifying the PsAMRIS-H with good intra-reader reproducibility. However, low signal-to-noise ratio (SNR), low spatial resolution, and system artefacts limit the application of the PsAMRIS-H, leading to low inter- and intra-reader agreement for individual features. |
| Databáze: | OpenAIRE |
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