Radiography Exam Fluoroscopy and Interventional Procedures 2

Question 1

Which contrast medium is most commonly used in a barium enema (lower GI series) procedure?

Accepted Answer

Barium sulfate suspension

Answer

Non-ionic iodinated contrast

Answer

Ionic iodinated contrast

Answer

Carbon dioxide gas alone

Question 2

What is the pharmacologic purpose of administering glucagon during a GI fluoroscopic examination?

Accepted Answer

To reduce peristalsis and decrease bowel motility for improved mucosal coating

Answer

To accelerate barium transit through the GI tract

Answer

To prevent allergic reactions to barium sulfate

Answer

To enhance contrast medium absorption into the mucosa

Question 3

During a small bowel follow-through (SBFT), how frequently are radiographs typically obtained after the patient ingests barium?

Accepted Answer

Every 15-30 minutes until barium reaches the terminal ileum

Answer

Only a single image is taken at 1 hour post-ingestion

Answer

Every 60 minutes for up to 8 hours

Answer

Every 5 minutes for the first hour only

Question 4

What anatomical structures are primarily evaluated during a voiding cystourethrogram (VCUG)?

Accepted Answer

The bladder and urethra during filling and voiding phases

Answer

The kidneys and collecting system for calculi

Answer

The renal arteries and veins for stenosis

Answer

The ureters during peristaltic activity

Question 5

How does a double-contrast barium enema differ from a single-contrast barium enema?

Accepted Answer

Double-contrast uses barium and air together to better coat and distend the colon for mucosal surface detail

Answer

Double-contrast uses two different concentrations of barium suspension

Answer

Double-contrast combines barium and iodine contrast simultaneously

Answer

Double-contrast provides better visualization of large polypoid filling defects only

Question 6

What is the most critical contraindication to performing a barium enema examination?

Accepted Answer

Suspected perforation of the colon

Answer

Patient allergy to iodinated contrast media

Answer

Recent colonoscopy performed within the last 24 hours

Answer

Mild constipation or the presence of fecal material

Question 7

What is the typical initial patient positioning used when beginning an upper GI series?

Accepted Answer

Recumbent position with rotation as directed by the fluoroscopist

Answer

Upright lateral position only

Answer

Prone Trendelenburg position

Answer

Left lateral decubitus position only