title: Femoral head activity in Perthes disease.
mesh_terms: D002648:Child; D005270:Femur Head / Q000000981:diagnostic imaging*; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging*; D006801:Humans; D007873:Legg-Calve-Perthes Disease / Q000000981:diagnostic imaging*; D011859:Radiography; D011868:Radioisotopes; D011877:Radionuclide Imaging
chemical_list: D011868:Radioisotopes