Fig. 3From: Evaluation of lateral pterygoid muscle in patients with temporomandibular joint anterior disk displacement using T1-weighted Dixon sequence: a retrospective studyFat fraction of lateral pterygoid muscle (LPM) in normal position disk (NP) group, anterior disk displacement with reduction (ADDWR) group and anterior disk displacement without reduction (ADDWOR) group. Yellow dotted line shows the ROI in in-phase image (a) and fat fraction image (b). The LPM of NP group shows no obvious fatty infiltration in in-phase image (c) and fat fraction image (d). (e, f) Slight fatty infiltration (white arrow headed) showed in the white dotted line in the ADDWR group, (g, h) while obvious fatty infiltration (red arrow headed) showed in the ADDWOR groupBack to article page