A patient requires a trauma AP axial cranial projection (Caldwell method). When the central ray is aligned with the OML, the tube angle reads 13 degrees caudad. What central ray angle should be used?

Question

Quizplus · Accepted Answer

The angle used for the AP axial cranial projection (Caldwell method) is 15 degrees caudad, but since the central ray is already angled 13 degrees caudad when aligned with the OML, an adjustment of only 2 degrees cephalad is needed to achieve the correct angle of 15 degrees caudad. Therefore, the correct central ray angle to use in this case is 2 degrees cephalad.

A Patient Requires a Trauma AP Axial Cranial Projection (Caldwell