A radiograph of a left posterior oblique (LPO) position taken during an IVU reveals that the right kidney is foreshortened and superimposed over the spine. What must the technologist do to correct this error during the repeat exposure?

The technologist has to decrease rotation.

Explanation:

An intravenous urography is most commonly used in investigating renal damage. The patient is positioned such that, the lower border of the casette, is positioned at the symphysis pubis and the x-ray beam is at the midline of the iliac crests.

Wrong positioning of the kidney could be as a result of excessive rotation, when aiming at the appropriate angle to get accurate imaging results. In this situation, upon a repeat, the technologist has to reduce the rotation, to obtain the correct image and avoid prolonged exposure of the patient to radiation.