Fig. 1
From: MRI-based synthetic CT for assessment of the bony elements of the sacroiliac joints in children
Some incidental findings were seen on both MRI-based synthetic CT (sCT) (left images a, c, and e) and CT (right images b, d, and f). a–b Spina bifida occulta of S1 (arrowhead) in a 15-year-old girl in an axial plane. Also note the ossification centers of the apophysis of the iliac crest that can be seen as well (arrows). c–d Lumbosacral transitional anomaly without bony fusion on the left side (asterisk) in a 12-year-old boy in a paracoronal plane. Also note the white line in the right SI joint (black arrowhead), consistent with an artifact on sCT (this was not seen on CT). e–f Enostoma in a 16-year-old female on the left side of S1 in a paracoronal plane (black arrows)