VTNE Diagnostic Imaging 3

Question 1

Which of the following contrast agents is used for gastrointestinal studies when perforation is suspected?

Accepted Answer

Iohexol (Omnipaque)

Answer

Water-soluble iodinated contrast such as iohexol is used when GI perforation is suspected because barium causes severe peritonitis if it leaks into the abdomen.

Question 2

A patient requires a myelogram. Which position is typically used for subarachnoid injection at the lumbar cistern (L4-L6)?

Accepted Answer

Lateral recumbency with the spine flexed

Answer

Lateral recumbency with the spine flexed opens the intervertebral spaces, facilitating accurate needle placement into the subarachnoid space at L4-L6.

Question 3

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

Accepted Answer

Vertebral heart score (VHS)

Answer

The vertebral heart score (VHS) compares the sum of the long and short cardiac axes to vertebral body lengths starting at T4, with >10.5 considered enlarged in most dogs.

Question 4

What artifact appears as a dark shadow behind a gallstone on ultrasound examination?

Accepted Answer

Acoustic shadowing

Answer

Acoustic shadowing occurs when sound waves are completely blocked by a highly reflective or attenuating structure such as a gallstone, creating a shadow distal to it.

Question 5

Fluoroscopy is most appropriate for evaluating which of the following conditions?

Accepted Answer

Real-time swallowing function (esophagram)

Answer

Fluoroscopy provides real-time dynamic imaging, making it ideal for evaluating swallowing mechanics, esophageal motility, and contrast agent movement through the GI tract.

VTNE - Veterinary Technician National Examination Practice Test

VTNE - Veterinary Technician National Examination Practice Test

VTNE Diagnostic Imaging 3