Veterinary Radiology and Diagnostic Imaging Flashcards

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

Answer: As Low As Reasonably Achievable

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).

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

Answer: R marker, placed on the right side of the image

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.

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

Answer: Whether the dog could be pregnant

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.

What is the purpose of collimation in veterinary radiography?

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

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.

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

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

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.

Which personal protective equipment (PPE) is MANDATORY for all personnel who must remain in the room during a radiographic exposure?

Answer: Lead apron, lead gloves, and thyroid shield

Anyone remaining in the room during X-ray exposure must wear a lead apron (protects the torso and gonads), lead gloves (protects hands near the beam), and a thyroid shield (protects the highly radiosensitive thyroid gland). Ideally, personnel should step behind a lead barrier or leave the room entirely.