NAVLE Diagnostic Imaging Interpretation 2

Question 1

On thoracic radiographs of a dog, you notice the cardiac silhouette occupies more than 75% of the thoracic width on the VD view. What does this most likely indicate?

Accepted Answer

Cardiomegaly

Answer

A cardiac silhouette exceeding 75% of thoracic width on the VD view is consistent with cardiomegaly.

Question 2

Which radiographic sign is MOST characteristic of a diaphragmatic hernia in a dog?

Accepted Answer

Loss of diaphragmatic outline with abdominal organs in the thorax

Answer

Loss of the normal diaphragmatic outline combined with abdominal viscera (e.g., intestinal loops, stomach) visible in the thoracic cavity is the hallmark of diaphragmatic hernia.

Question 3

On ultrasound, a hypoechoic halo surrounding a hepatic mass in a dog is called:

Accepted Answer

Target lesion

Answer

A hypoechoic halo surrounding a mass on ultrasound is referred to as a target or bull's-eye lesion, often associated with metastatic disease.

Question 4

A cat presents with a 'ground-glass' opacity on thoracic radiographs. Which condition is MOST associated with this finding?

Accepted Answer

Pulmonary edema

Answer

Ground-glass opacity reflects partial alveolar filling, most commonly seen with pulmonary edema in cats.

Question 5

On a lateral skull radiograph, which structure appears as a radiolucent line running through the calvarium and should not be mistaken for a fracture?

Accepted Answer

Sagittal suture

Answer

The sagittal suture appears as a radiolucent line in the dorsal calvarium and is a normal anatomic finding.

NAVLE - North American Veterinary Licensing Examination Practice Test

NAVLE - North American Veterinary Licensing Examination Practice Test

NAVLE Diagnostic Imaging Interpretation 2