Evolve

In a typical x-ray examination room, what is considered a secondary protective barrier?

Ceiling

Which calculation is used to determine grid ratio?

Height of the lead strips divided by the width of the interspace material.

For a tangential inferosuperior projection of the zygomatic arch, how is the patient's head positioned to demonstrate a depressed fracture of the right zygomatic arch?

Rotated toward the right side.

Which grid ratio results in the lowest dose to a patient, because less milliampere-seconds (mAs) is required?

5:1

A radiographer is performing a forearm exam on a patient with advanced Parkinson’s Disease. Which technical factor adjustments should be used?

Decrease the exposure time to reduce risk of patient motion

What is the longest field size dimension allowable for 10 inches by 12 inches collimation at a 40 inch source to image distance (SID)?

12.8 inches.

Which statement is true regarding exposure indicator and the evaluation of digital images?

Exposure indicator must be reviewed with every image and must fall within the manufacturer's acceptable range

What is the function of a rectifier?

Convert alternating current to pulsating direct current

What is the result if pixel bit depth is decreased?

Contrast resolution is decreased

(mR) exposure to an image receptor plate if 70 kilovolts peak (kVp) at 25 milliampere-seconds (mAs) produces 1.6 mR?

70 kVp at 31.25 mAs.

Why should a radiographer routinely use a small focal spot when imaging extremities?

Increase in spatial resolution.