Small Animal Diagnostic Imaging Flashcards
7 cards from real NAVLE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Small Animal Diagnostic Imaging flashcards as text
A dog's abdominal ultrasound reveals a splenic mass with a 'target' or 'bull's-eye' lesion appearance (hypoechoic halo around a hyperechoic center). This pattern is most associated with:
Answer: Metastatic neoplasia
A target or bull's-eye lesion pattern in the spleen is classically associated with metastatic disease, where a necrotic center is surrounded by viable tumor tissue.
On a ventrodorsal thoracic radiograph, the cardiac silhouette of a healthy dog should not exceed what percentage of the thoracic width at the level of the 8th rib?
Answer: 60%
The cardiac silhouette on a VD projection normally occupies no more than 60% of the thoracic width at the level of the 8th intercostal space.
Which MRI sequence best demonstrates hemorrhage of varying ages due to its sensitivity to paramagnetic effects of blood breakdown products?
Answer: Gradient echo (GRE/T2*)
Gradient echo sequences are highly sensitive to susceptibility effects caused by hemosiderin and deoxyhemoglobin, making them ideal for detecting hemorrhage.
A radiograph of a cat's elbow shows periarticular soft tissue swelling and subchondral bone lysis without significant new bone production. This pattern is most consistent with:
Answer: Septic arthritis
Septic arthritis characteristically causes joint space narrowing, subchondral bone lysis, and periarticular soft tissue swelling with minimal productive bone response.
During abdominal ultrasound, the normal feline adrenal gland has which characteristic appearance?
Answer: Bilobed hypoechoic structure with a hyperechoic medulla, less than 4.3mm width
Normal feline adrenal glands are bilobed (peanut-shaped) with a hypoechoic cortex and hyperechoic medulla, measuring less than 4.3mm in width.
Which radiographic sign on a lateral thoracic view indicates right-sided cardiomegaly in a dog?
Answer: Increased sternal contact (more than 3 sternal segments)
Right heart enlargement causes the cardiac silhouette to contact more sternal segments than normal (typically more than 3), displacing the apex ventrally.
On ultrasound, a dog's liver shows hyperechoic parenchyma compared to the spleen and falciform fat. This finding is most consistent with:
Answer: Hepatic lipidosis
Diffuse hepatic hyperechogenicity compared to the spleen and falciform fat is the classic ultrasound pattern of hepatic lipidosis (fatty liver).