A radiograph of an AP axial projection of the cervical spine reveals that the intervertebral joints are not open.The following analog factors were used for this projection: 5° cephalad angle, 40-inch (100-cm) SID, grid, slight extension of the skull, and the CR centered to the thyroid cartilage.Which of the following modifications should be made during the repeat exposure?

Question

Quizplus · Accepted Answer

The intervertebral joints not being open indicates that the CR was not angled enough or angled in the wrong direction. Increasing the angle of the CR (in this case, angle it more cephalad) will help open up the intervertebral joints and produce a better image. Therefore, choice D is the best option.Keeping the CR perpendicular to the image receptor (choice A) would not help to open up the intervertebral joints. Increasing the SID to 72 inches (choice B) may reduce magnification, but it will not solve the problem of the intervertebral joints not being open. Centering the CR to the gonion (choice C) is not relevant to this projection.

A Radiograph of an AP Axial Projection of the Cervical