CT images from needle placement in 2 different patients with sacral insufficiency fractures illustrating the possible orientation for the bone biopsy needle(s) in the sacrum.
A, Axial image showing vertical orientation of the bone biopsy needles in a patient with bilateral fractures.
B. Axial image showing an oblique orientation, paralleling the sacroiliac joint of the bone biopsy needle, in a patient with a unilateral fracture.