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 5° to 7° cephalad.What specific positioning error is present on this radiograph?

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Quizplus · Accepted Answer

The sacrum is foreshortened on this radiograph, indicating that the CR was not angled enough to open up the sacral canal. The sacral foramina are also not clearly seen, further supporting the idea that insufficient CR angulation was used. Excessive CR angulation or wrong direction of the CR angle would not result in a foreshortened sacrum. Rotation of the sacrum could potentially cause the sacral foramina to appear distorted, but it would not cause the sacrum to be foreshortened.

A Radiograph of an AP Axial Sacrum Reveals That It