Quantitative MRI in myositis patients: comparison with healthy volunteers and radiological visual assessment

•Quantitative MR can detect differences between myositis and healthy controls.•Fat fraction T2 measurements are higher muscle volume is lower in myositis.•T2 identify pathology undetectable by radiologist scoring. AIMTo assess whether magnetic resonance imaging (MRI)-based of T2, fat fraction, diffusion tensor imaging, the muscles patients controls, to how they compare with semi-quantitative MRI diagnosis.MATERIALS AND METHODSSixteen 16 age- gender-matched controls underwent their thigh. Quantitative radiologists' scores were assessed. Strength was assessed using an isokinetic dynamometer.RESULTS: Fat values whereas compared controls. There no difference diffusion. Muscle strength In a subgroup eight patients, scored as unaffected radiologists, still significantly patients.CONCLUSIONSQuantitative Changes undetected visual, scoring, be detected quantitative measurements. This suggests that may useful for management patients. To diagnosis. Sixteen dynamometer. RESULTS: