Fig. 1From: Hypointense signals in the infrapatellar fat pad assessed by magnetic resonance imaging are associated with knee symptoms and structure in older adults: a cohort studyHypointense signals on sagittal T2-weighted images with fat saturation. a Normal IPFP; b grade 1 hypointense signals of IPFP (arrow); c grade 2 hypointense signals of IPFP (arrow); d grade 3 hypointense signals of IPFP (arrow)Back to article page