VTNE Diagnostic Imaging Techniques 4

Question 1

Which contrast medium is typically used for a positive-contrast cystogram in small animals?

Accepted Answer

Iodinated water-soluble contrast agent

Answer

Iodinated water-soluble contrast agents (e.g., iohexol) are used for cystography because barium is contraindicated if bladder rupture is possible and would be hazardous in the peritoneal cavity.

Question 2

On thoracic radiographs, which cardiac measurement is used to objectively assess heart size in dogs?

Accepted Answer

Vertebral heart score (VHS)

Answer

The vertebral heart score (VHS) measures cardiac long and short axes and compares their sum to thoracic vertebral body lengths, providing a breed-adjusted assessment of heart size.

Question 3

A radiograph of a cat's abdomen reveals a 'string of pearls' pattern in the small intestine. This finding suggests:

Accepted Answer

Mechanical ileus with gas trapped in mucosal folds

Answer

A 'string of pearls' pattern describes small oval gas bubbles trapped between mucosal folds, a classic sign of mechanical small intestinal obstruction.

Question 4

Which statement about nuclear scintigraphy (gamma scintigraphy) is CORRECT?

Accepted Answer

It uses radioactive tracers to evaluate physiologic function

Answer

Nuclear scintigraphy uses radiopharmaceuticals (radioactive tracers) that localize to specific tissues or organs, allowing functional assessment such as thyroid activity or bone metabolism.

Question 5

When taking a radiograph of a rabbit's skull, which positioning is MOST important for a true lateral view?

Accepted Answer

Ensuring both tympanic bullae are superimposed

Answer

True lateral skull positioning requires both tympanic bullae to be superimposed; any rotation will separate them and distort assessment of the nasal passages, teeth, and bullae.

VTNE - Veterinary Technician National Examination Practice Test

VTNE - Veterinary Technician National Examination Practice Test

VTNE Diagnostic Imaging Techniques 4