ARRT Fluoroscopy and Special Procedures 2

Question 1

During a hysterosalpingography (HSG), what type of contrast medium is typically used?

Accepted Answer

Water-soluble iodinated contrast

Answer

High-density barium sulfate

Answer

Air only (negative contrast)

Answer

Gadolinium-based contrast agent

Question 2

What serious complication can result from accidental introduction of air into the venous circulation during an IV contrast injection?

Accepted Answer

Venous air embolism

Answer

Allergic anaphylaxis

Answer

Osmotic nephropathy

Answer

Extravasation necrosis

Question 3

Which projection during a barium enema best demonstrates the sigmoid colon in its entirety with minimal overlap?

Accepted Answer

LPO or RPO oblique projection

Answer

AP projection

Answer

Lateral projection

Answer

PA projection with caudal angulation

Question 4

What is the primary purpose of the 'last image hold' (LIH) feature available on modern fluoroscopic equipment?

Accepted Answer

To display the last acquired fluoroscopic frame so the radiologist can study it without continuing radiation exposure

Answer

To store the final image permanently in PACS

Answer

To freeze the table motion during a procedure

Answer

To automatically print the most diagnostically significant frame

Question 5

During an upper GI double-contrast examination, what is the primary advantage of the double-contrast technique over single-contrast?

Accepted Answer

It provides superior mucosal detail enabling detection of small lesions

Answer

It eliminates the need for patient preparation

Answer

It reduces examination time significantly

Answer

It lowers the radiation dose to the patient

Question 6

What is the pharmacological role of glucagon when administered during a GI fluoroscopic examination?

Accepted Answer

It produces hypotonic duodenography by temporarily relaxing smooth muscle

Answer

It stimulates peristalsis to speed bowel transit

Answer

It neutralizes gastric acid to improve mucosal coating

Answer

It constricts the pyloric sphincter to retain contrast in the stomach

Question 7

During a voiding cystourethrogram (VCUG), what critical action is the patient asked to perform at the key phase of the examination?

Accepted Answer

Actively void (urinate) while images are obtained

Answer

Hold their breath during image acquisition

Answer

Perform a Valsalva maneuver to increase intra-abdominal pressure

Answer

Remain completely still in the supine position throughout