ARRT Fluoroscopy and Special Procedures 1

Question 1

What is the primary advantage of fluoroscopy over static radiography?

Accepted Answer

It allows real-time dynamic visualization of structures and motion

Answer

It produces images with higher spatial resolution

Answer

It uses less ionizing radiation than a single radiograph

Answer

It eliminates the need for contrast media

Question 2

During a barium swallow examination, which position best demonstrates a posterior esophageal impression or defect?

Accepted Answer

RAO projection

Answer

AP projection

Answer

Lateral projection

Answer

PA projection

Question 3

Which type of contrast agent is routinely used for a double-contrast barium enema?

Accepted Answer

Low-density barium sulfate with air

Answer

Iodinated water-soluble contrast

Answer

High-density barium sulfate suspension

Answer

Gadolinium-based contrast

Question 4

Which fluoroscopic technique most effectively reduces patient entrance skin dose during a procedure?

Accepted Answer

Increasing the kVp and using last image hold instead of continuous fluoroscopy

Answer

Decreasing SID to increase beam intensity

Answer

Keeping the image intensifier as far from the patient as possible

Answer

Using continuous fluoroscopy rather than pulsed fluoroscopy

Question 5

What is the primary function of the image intensifier (II) in a fluoroscopic unit?

Accepted Answer

To convert X-ray energy to a bright visible light image for viewing

Answer

To collimate the X-ray beam to the field of interest

Answer

To digitize analog images for PACS storage

Answer

To filter low-energy scatter radiation before it reaches the detector

Question 6

Which fluoroscopic procedure is specifically designed to evaluate the swallowing mechanism and detect aspiration?

Accepted Answer

Modified barium swallow (videofluoroscopic swallow study)

Answer

Upper GI series

Answer

Barium enema

Answer

Esophagram with double contrast

Question 7

What is the primary purpose of obtaining a scout (KUB) radiograph before administering contrast for a fluoroscopic GI study?

Accepted Answer

To assess existing pathology, bowel preparation adequacy, and set technique factors

Answer

To verify the patient's identity against their wristband

Answer

To confirm the fluoroscopy unit is properly calibrated

Answer

To pre-expose the image receptor and improve subsequent image quality