Radiography Exam ARRT Radiography 4

Question 1

A grid with a ratio of 12:1 compared to an 8:1 grid will:

Accepted Answer

Remove more scatter radiation but require more mAs

Answer

Higher ratio grids remove more scatter (improving contrast) but transmit less primary radiation, requiring increased mAs to maintain density.

Question 2

Which of the following changes will DECREASE quantum noise (mottle) on a digital radiograph?

Accepted Answer

Increasing mAs

Answer

Increasing mAs delivers more photons to the detector, reducing statistical noise (quantum mottle) and producing a smoother image.

Question 3

For a lateral projection of the cervical spine, the central ray is directed to:

Accepted Answer

C4

Answer

The central ray is directed horizontally to the level of C4 (the most prominent cervical vertebra) for the lateral cervical spine.

Question 4

What is the primary advantage of using a high-frequency generator over a single-phase generator?

Accepted Answer

More consistent, nearly constant potential with less voltage ripple

Answer

High-frequency generators produce nearly constant potential (less than 1% ripple), resulting in a more efficient and consistent x-ray beam.

Question 5

A patient is positioned prone with the head turned to one side. A horizontal central ray is directed to the level of ASIS. This describes which projection?

Accepted Answer

Ventral decubitus abdomen

Answer

The prone (ventral decubitus) position with a horizontal beam is used for cross-table lateral or decubitus abdominal studies to demonstrate air-fluid levels.

Radiography Exam Practice Test

Radiography Exam Practice Test

Radiography Exam ARRT Radiography 4