Fig. 5From: Calcification of the acetabular labrum of the hip: prevalence in the general population and relation to hip articular cartilage and fibrocartilage degenerationa Exemplary sample of scanning electron microscopy (SEM) imaging of the acetabular labrum of the hip (ALH) fibrocartilage showing well-developed rhomboid and prismatic crystals in various sizes and spatial arrangements, indicating the presence of calcium pyrophosphate dihydrate (CPPD) crystals. b Corresponding sample of measured Raman spectra (green line) with a peak count at 1050 cm− 1 confirming the presence of CPPD crystals in comparison to the reference spectra of t-CPPD (red line)Back to article page