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Fig. 3 | BMC Musculoskeletal Disorders

Fig. 3

From: Assessment of subchondral bone marrow lesions in knee osteoarthritis by MRI: a comparison of fluid sensitive and contrast enhanced sequences

Fig. 3

Trans-axial post-contrast T1 FS MR images of the femoral condyles. Two identical images without (a) and with (b) calculations of Gray (GY), performed in Impax. The difference in signal intensity is barely visible in image (a) between the medial and central (lateral) part of the medial femoral condyle. Yet, there is a difference in GY between the areas of 151.1 GY, meaning the average GY in the central portion is ~ 21% lower than in the medial portion. Also note the blood vessels perforating the condyles from the periphery

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