ARRT FLUOROSCOPY CERTIFICATION EXAM 2026 –
COMPLETE STUDY GUIDE & TEST BANK | 600 REAL
EXAM QUESTIONS WITH DETAILED VERIFIED
ANSWERS | GRADED A+ | LATEST AND MOST
ACCURATE PREP
1. What is the primary purpose of a fluoroscopic examination?
a. To produce static radiographic images
b. To visualize moving internal structures in real time
c. To measure bone density
d. To perform radiation therapy
Correct Answer: b
Explanation: Fluoroscopy provides continuous X-ray imaging, allowing real-time
visualization of dynamic processes such as contrast flow, joint motion, or catheter
guidance.
2. What device converts X-rays into visible light in a traditional image intensifier?
a. Photocathode
b. Input phosphor
c. Output phosphor
d. Anode
Correct Answer: b
Explanation: The input phosphor (typically cesium iodide) absorbs X-rays and
emits light photons, which then strike the photocathode.
3. What is the typical total brightness gain of a modern image intensifier?
1
,a. 100-500
b. 1,000-5,000
c. 5,000-20,000
d. 50,000-100,000
Correct Answer: c
Explanation: Total brightness gain (flux gain × minification gain) typically ranges
from 5,000 to 20,000.
4. What is the recommended minimum source-to-skin distance (SSD) for fixed
fluoroscopy equipment?
a. 12 inches (30 cm)
b. 15 inches (38 cm)
c. 18 inches (45 cm)
d. 24 inches (61 cm)
Correct Answer: b
Explanation: FDA regulations require a minimum SSD of 38 cm (15 inches) for
fixed fluoroscopic units.
5. What is the maximum allowable air kerma rate for fluoroscopy without high-
level control (HLC)?
a. 1.0 mGy/min (0.1 R/min)
b. 5.0 mGy/min (0.5 R/min)
c. 10 mGy/min (1 R/min)
d. 20 mGy/min (2 R/min)
Correct Answer: c
2
,Explanation: Standard fluoroscopy mode is limited to 10 mGy/min (1 R/min) at
the tabletop.
6. What is the primary advantage of pulsed fluoroscopy over continuous
fluoroscopy?
a. Higher patient dose
b. Lower image quality
c. Reduced radiation dose
d. Faster processing time
Correct Answer: c
Explanation: Pulsed fluoroscopy delivers X-rays in short pulses, significantly
reducing patient and staff dose.
7. Which component of the image intensifier accelerates the electrons?
a. Input phosphor
b. Photocathode
c. Electrostatic focusing lenses
d. Output phosphor
Correct Answer: c
Explanation: Electrostatic focusing lenses accelerate and focus electrons onto the
output phosphor.
8. What is the typical diameter of the output phosphor in an image intensifier?
a. 1-2 cm
b. 2.5-5 cm
c. 10-15 cm
3
, d. 20-30 cm
Correct Answer: b
Explanation: Output phosphor diameter is typically 2.5 to 5 cm; input phosphor is
much larger.
9. What does "flux gain" refer to in an image intensifier?
a. Ratio of input to output phosphor area
b. Ratio of output light photons to input X-ray photons
c. Number of electrons per light photon
d. Acceleration voltage applied
Correct Answer: b
Explanation: Flux gain is the ratio of output light photons to input X-ray photons,
typically 20-50.
10. What is the minimum lead equivalent thickness for a protective apron used in
fluoroscopy?
a. 0.25 mm Pb
b. 0.5 mm Pb
c. 1.0 mm Pb
d. 1.5 mm Pb
Correct Answer: b
Explanation: 0.5 mm Pb equivalent attenuates 90-95% of scattered radiation.
11. What is the function of automatic brightness control (ABC) in fluoroscopy?
a. Adjusts kVp and mA to maintain constant image brightness
4
COMPLETE STUDY GUIDE & TEST BANK | 600 REAL
EXAM QUESTIONS WITH DETAILED VERIFIED
ANSWERS | GRADED A+ | LATEST AND MOST
ACCURATE PREP
1. What is the primary purpose of a fluoroscopic examination?
a. To produce static radiographic images
b. To visualize moving internal structures in real time
c. To measure bone density
d. To perform radiation therapy
Correct Answer: b
Explanation: Fluoroscopy provides continuous X-ray imaging, allowing real-time
visualization of dynamic processes such as contrast flow, joint motion, or catheter
guidance.
2. What device converts X-rays into visible light in a traditional image intensifier?
a. Photocathode
b. Input phosphor
c. Output phosphor
d. Anode
Correct Answer: b
Explanation: The input phosphor (typically cesium iodide) absorbs X-rays and
emits light photons, which then strike the photocathode.
3. What is the typical total brightness gain of a modern image intensifier?
1
,a. 100-500
b. 1,000-5,000
c. 5,000-20,000
d. 50,000-100,000
Correct Answer: c
Explanation: Total brightness gain (flux gain × minification gain) typically ranges
from 5,000 to 20,000.
4. What is the recommended minimum source-to-skin distance (SSD) for fixed
fluoroscopy equipment?
a. 12 inches (30 cm)
b. 15 inches (38 cm)
c. 18 inches (45 cm)
d. 24 inches (61 cm)
Correct Answer: b
Explanation: FDA regulations require a minimum SSD of 38 cm (15 inches) for
fixed fluoroscopic units.
5. What is the maximum allowable air kerma rate for fluoroscopy without high-
level control (HLC)?
a. 1.0 mGy/min (0.1 R/min)
b. 5.0 mGy/min (0.5 R/min)
c. 10 mGy/min (1 R/min)
d. 20 mGy/min (2 R/min)
Correct Answer: c
2
,Explanation: Standard fluoroscopy mode is limited to 10 mGy/min (1 R/min) at
the tabletop.
6. What is the primary advantage of pulsed fluoroscopy over continuous
fluoroscopy?
a. Higher patient dose
b. Lower image quality
c. Reduced radiation dose
d. Faster processing time
Correct Answer: c
Explanation: Pulsed fluoroscopy delivers X-rays in short pulses, significantly
reducing patient and staff dose.
7. Which component of the image intensifier accelerates the electrons?
a. Input phosphor
b. Photocathode
c. Electrostatic focusing lenses
d. Output phosphor
Correct Answer: c
Explanation: Electrostatic focusing lenses accelerate and focus electrons onto the
output phosphor.
8. What is the typical diameter of the output phosphor in an image intensifier?
a. 1-2 cm
b. 2.5-5 cm
c. 10-15 cm
3
, d. 20-30 cm
Correct Answer: b
Explanation: Output phosphor diameter is typically 2.5 to 5 cm; input phosphor is
much larger.
9. What does "flux gain" refer to in an image intensifier?
a. Ratio of input to output phosphor area
b. Ratio of output light photons to input X-ray photons
c. Number of electrons per light photon
d. Acceleration voltage applied
Correct Answer: b
Explanation: Flux gain is the ratio of output light photons to input X-ray photons,
typically 20-50.
10. What is the minimum lead equivalent thickness for a protective apron used in
fluoroscopy?
a. 0.25 mm Pb
b. 0.5 mm Pb
c. 1.0 mm Pb
d. 1.5 mm Pb
Correct Answer: b
Explanation: 0.5 mm Pb equivalent attenuates 90-95% of scattered radiation.
11. What is the function of automatic brightness control (ABC) in fluoroscopy?
a. Adjusts kVp and mA to maintain constant image brightness
4
