CVA Veterinary Radiology and Diagnostic Imaging

Question 1

What does the acronym ALARA stand for in veterinary radiation safety?

Accepted Answer

As Low As Reasonably Achievable

Answer

ALARA stands for 'As Low As Reasonably Achievable' and is the guiding principle of radiation safety. It means minimizing radiation exposure through time (reduce exposure duration), distance (stay as far from the beam as possible), and shielding (use lead aprons, gloves, and thyroid shields).

Question 2

When placing a right lateral radiograph marker on a patient, which identifier should be used?

Accepted Answer

R marker, placed on the right side of the image

Answer

For a right lateral view, the patient is positioned on its right side and the R marker is placed on the right (dependent) side of the image closest to the cassette. Correct marker placement ensures the radiograph is properly identified and legally defensible as a medical record.

Question 3

Before obtaining radiographs of a female dog, what information should always be confirmed first?

Accepted Answer

Whether the dog could be pregnant

Answer

Pregnancy status must be confirmed before radiography because ionizing radiation poses a risk to developing fetuses, particularly during the first trimester of organogenesis. If pregnancy is possible or confirmed, the veterinarian must weigh the diagnostic benefit against the risk and often pursue ultrasound as an alternative.

Question 4

What is the purpose of collimation in veterinary radiography?

Accepted Answer

To restrict the X-ray beam to only the area of interest

Answer

Collimation restricts the primary X-ray beam to the anatomical area of interest using adjustable lead shutters in the collimator. This reduces scatter radiation (improving image quality) and minimizes unnecessary radiation exposure to both the patient and personnel.

Question 5

Which of the following is the CORRECT patient position for a ventrodorsal (VD) abdominal radiograph?

Accepted Answer

Patient lying on its back (dorsal recumbency) with legs extended caudally

Answer

For a ventrodorsal (VD) view, the patient lies in dorsal recumbency (on its back) so the X-ray beam travels from the ventral surface (belly) through to the dorsal surface. The hindlimbs are extended caudally to prevent superimposition over abdominal structures.

(CVA) Certified Veterinary Assistant Practice Test

(CVA) Certified Veterinary Assistant Practice Test

CVA Veterinary Radiology and Diagnostic Imaging