Total body radiography and coronal MRI.

Total body anteroposterior radiograph image (A) and T1-weighted coronal scout MRI (B) of a fetus 21 weeks of gestational age. Areas of ossification containing BM are clearly recognizable as radiodense structures in the radiograph. Corresponding areas of low signal intensity (dark) are visible in the MRI. These areas are well delineated from the surrounding cartilage, which shows much higher signal intensity (light).