RAD Quiz 13

A patient may bite down on a sterilized cotton roll that is placed on the same side of the biteblock as the teeth to provide stabilization and add to patient comfort.

• True

• False

An advantage of the paralleling technique is that it produces accurate radiographic images with a minimal amount of superimposition of adjacent structures. 

• True

• False

An image receptor holder with an external aiming device can make radiographic errors less likely.

• True

• False

Because of the supporting structures on the maxillary arch, to accomplish a parallel relationship between the image receptor and the long axes of teeth, the image receptor must be placed closer to the teeth.

• True

• False

Correct horizontal angulation is determined by positioning the image receptor parallel to the embrasure of two predetermined teeth.

• True

• False

Correct vertical angulation is determined by positioning the central rays perpendicular to the long axis of the teeth of interest.

• True

• False

The use of the paralleling technique is ideal for adult patients with a small mouth or shallow palatal vault.

• True

• False

When using an image receptor holder with an external aiming device, the patient's head does not need to be precisely positioned.

• True

• False