Fig. 2From: Unexplained back pain and sciatica: the added value of upright dynamic MRI of the lumbar spine in cases of clinical/radiological mismatchSagittal T2WI MRI of the lumbar spine acquired in supine (A) and upright weight bearing position (B). At the level of L1–L2, there is borderline narrowing of the spinal canal, however in the upright position there is clear significant narrowing of the canal (circle). Note the minimal retrolithesisBack to article page