ICVA Veterinary Diagnostic Imaging 3

Question 1

Which ultrasonographic artifact is caused by the total reflection of the sound beam by a highly reflective surface, such as bone or gas?

Accepted Answer

Acoustic shadowing

Answer

Acoustic shadowing occurs when a highly reflective surface (bone, gas, calculi) completely reflects or absorbs the ultrasound beam, creating a shadow behind the structure.

Question 2

On a thoracic radiograph, which opacity is CORRECTLY matched to its radiographic appearance?

Accepted Answer

Metal opacity — brightest white on the image

Answer

Metal has the highest atomic number and attenuates the X-ray beam the most, appearing as the brightest white (most opaque) structure on radiographs.

Question 3

Which statement about MRI safety is MOST accurate for veterinary practice?

Accepted Answer

Pacemakers and ferromagnetic implants are absolute contraindications to MRI

Answer

Pacemakers can malfunction and ferromagnetic implants can move or heat within the MRI magnetic field, making them absolute contraindications to MRI scanning.

Question 4

A cat presents with acute hindlimb paresis. Survey spinal radiographs are normal. What is the MOST appropriate next imaging step?

Accepted Answer

Advanced cross-sectional imaging (MRI or CT myelogram)

Answer

Normal survey radiographs in a cat with acute hindlimb paresis indicate a soft tissue cause; MRI or CT myelogram is required to evaluate the spinal cord and intervertebral discs.

Question 5

In equine radiography, which standard view best evaluates the navicular bone for palmar/plantar flexor cortex erosions?

Accepted Answer

Flexor tangential (skyline) view

Answer

The flexor tangential (skyline) view projects the navicular bone in profile, making it the optimal view for detecting flexor cortex erosions and cyst-like lesions.

(ICVA) International Council for Veterinary Assessment Practice Test

(ICVA) International Council for Veterinary Assessment Practice Test

ICVA Veterinary Diagnostic Imaging 3