• David T Ryan, Marion Hanley, Annette White, John P Hynes, Niamh M Long, Stephen J Eustace, and Eoin C Kavanagh.
• Radiology Department, National Orthopaedic Hospital Cappagh, Dublin, Ireland. davidtryan@hotmail.com.
• Ir J Med Sci. 2024 Oct 1; 193 (5): 251525232515-2523.

BackgroundMR arthrography (MRA) has previously been the radiological gold standard for investigating labral and chondral lesions of the hip joint. In recent years, 3T MRI has demonstrated comparable accuracy, being adopted as the first-line imaging investigation in many institutions.AimsWe compare the associated increased cost and radiation dose of the fluoroscopic component of the MRA compared to MRI.MethodsIn this retrospective review over 2 years, 120 patients (mean age 27.3 years ± 13.2, range 8-67) underwent 3T MRA or non-contrast 3T MRI. Three musculoskeletal radiologists reported the data independently. Primary objectives included cost-comparison between each and radiation dose of the fluoroscopic component of the MRA. Secondary objectives included comparing detection of pathology involving the acetabular labrum, femoral cartilage, and acetabular cartilage.ResultsThen, 58 (48%) underwent 3T MRA and 62 (52%) patients underwent 3T MRI. The added cost of the fluoroscopic injection prior to MRA was €116.31/patient, equating to €7211.22 savings/year. MRA was associated with a small radiation dose of 0.003 mSv.ConclusionsTransitioning from 3T MRA to 3T MRI in the investigation of intra-articular hip pathology increases cost savings and reduces radiation dose.© 2024. The Author(s), under exclusive licence to Royal Academy of Medicine in Ireland.

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