Fig. 4From: The effectiveness of a percutaneous endoscopic approach in a patient with psoas and epidural abscess accompanied by pyogenic spondylitis: a case reportFluoroscopy images during surgery. a, b The passage between the lumbar disc and the psoas abscess was detected by the flow of Omnipaque (iohexol). c, d The position of needle in the psoas muscle was confirmed by the flow of Omnipaque (iohexol)Back to article page