A radiograph of an AP axial sacrum reveals that it is foreshortened and the sacral foramina are not clearly seen.The patient was in an AP supine position,and the technologist angled the CR 10° cephalad.What specific positioning error is present on this radiograph?

Question

Quizplus · Accepted Answer

The radiograph shows foreshortening of the sacrum, which indicates that the central ray was not angled enough. The angle used was 10° cephalad, which would help to open up the sacral foramina and provide better visualization, but it was not sufficient in this case. Excessive CR angulation or wrong direction of the CR angle would result in a different type of error, and rotation of the sacrum would lead to asymmetrical appearance of the foramina.

A Radiograph of an AP Axial Sacrum Reveals That It