Posteroanterior vs. anteroposterior lumbar spine radiology.
Yochum
T R
TR
D001416:Back Pain / Q000175:diagnosis; D002684:Chiropractic; D006801:Humans; D007085:Ilium / Q000000981:diagnostic imaging; D008161:Lumbosacral Region / Q000000981:diagnostic imaging*; D011859:Radiography