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Fluoroscopy Physics: MCQs, Matching & Problems for Radiology Students, Exams of Nursing

United States International UniversityNursing

A comprehensive set of multiple-choice questions, matching exercises, and problems related to fluoroscopy in radiology physics. It covers topics such as fluoroscopic x-ray examination, image intensification, digital fluoroscopy, and radiation exposure reduction. The questions are designed to test understanding of key concepts and principles in fluoroscopy, making it a valuable resource for students and professionals in the field. It includes questions about the components of a fluoroscopic system, such as the input screen, photocathode, electrostatic lenses, and output screen, as well as concepts like brightness gain, minification, and vignetting. The document also addresses digital fluoroscopy techniques, including post-processing features and detector technology. Finally, it covers radiation safety measures and exposure reduction methods in fluoroscopy.

Typology: Exams

2024/2025

Available from 08/21/2025

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RADIOLOGY PHYSICS CHAPTER 36 FLUOROSCOPY
CHAPTER 36—FLUOROSCOPY
MULTIPLE CHOICE
1. Fluoroscopy is a ____ x-ray examination.
a. dynamic, real-time
b. static
c. therapeutic
d. all of the above - Answer -ANS: A
2. Fluoroscopy is the domain of the
a. radiographer.
b. radiologist.
c. radiation physicist.
d. quality control technologist. - Answer -ANS: B
3. Fluoroscopy is commonly used for observation of
a. cardiovascular structures.
b. a surgical procedure.
c. the GI tract.
d. all of the above - Answer -ANS: D
4. The fluoroscopic x-ray tube and image receptor are mounted
a. on a carriage.
b. coincident to each other.
c. from the ceiling.
d. orthogonal to each other. - Answer -ANS: B
5. The fluoroscopic carriage commonly supports the
a. image receptor.
b. power-assist drive controls.
c. digital spot film selector.
d. all of the above - Answer -ANS: D
6. Fluoroscopic mA range is commonly ____ mA.
a. 0.5 to 5.0
b. 5.0 to 10.0
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RADIOLOGY PHYSICS CHAPTER 36 FLUOROSCOPY

CHAPTER 36—FLUOROSCOPY

MULTIPLE CHOICE

  1. Fluoroscopy is a ____ x-ray examination. a. dynamic, real-time b. static c. therapeutic d. all of the above - Answer - ANS: A
  2. Fluoroscopy is the domain of the a. radiographer. b. radiologist. c. radiation physicist. d. quality control technologist. - Answer - ANS: B
  3. Fluoroscopy is commonly used for observation of a. cardiovascular structures. b. a surgical procedure. c. the GI tract. d. all of the above - Answer - ANS: D
  4. The fluoroscopic x-ray tube and image receptor are mounted a. on a carriage. b. coincident to each other. c. from the ceiling. d. orthogonal to each other. - Answer - ANS: B
  5. The fluoroscopic carriage commonly supports the a. image receptor. b. power-assist drive controls. c. digital spot film selector. d. all of the above - Answer - ANS: D
  6. Fluoroscopic mA range is commonly ____ mA. a. 0.5 to 5. b. 5.0 to 10.

c. 10.0 to 100 d. 100 to 500 - Answer - ANS: A

  1. During fluoroscopy, the SOD on a fixed unit cannot be less than ____ inches. a. 12 b. 1 5 c. 20 d. 40 - Answer - ANS: B
  2. During fluoroscopic image intensification, the primary x-ray beam exits the patient and strikes the ____ of the image intensifier. a. input screen b. electrostatic lenses c. photocathode d. output screen - Answer - ANS: A
  3. The input screen absorbs ____ and emits ____. a. x-ray photons; light photons b. x-ray photons; electrons c. light photons; x-ray photons d. electrons; x-ray photons - Answer - ANS: A
  4. The photocathode absorbs ____ and emits ____. a. x-ray photons; light photons b. light photons; electrons c. light photons; x-ray photons d. electrons; light photons - Answer - ANS: B
  5. Electrostatic lenses are used to accelerate and focus a. light photons. b. x-ray photons. c. electrons. d. scattered photons. - Answer - ANS: C
  6. The primary ____ occurs from the acceleration and focusing of the electron beam. a. phosphorescence b. minification c. magnification d. brightness gain - Answer - ANS: D
  7. The output screen absorbs ____ and emits ____. a. electrons; light photons b. electrons; x-ray photons
  1. Total brightness gain is a. a measure of the increase in image intensity. b. determined by minification gain. c. determined by flux gain. d. all of the above - Answer - ANS: D
  2. Fluoroscopic resolution with image intensification will vary according to a. minification gain. b. electrostatic focal point. c. input and output screen diameter d. all of the above - Answer - ANS: D
  3. The edge distortion problem in image intensification tubes is called a. minification. b. magnification. c. vignetting. d. all of the above - Answer - ANS: C
  4. The most common solution for quantum mottle is to a. increase the fluoro tube mA b. decrease the fluoro tube mA. c. decrease the efficiency of the input screen. d. decrease the efficiency of the flux gain. - Answer - ANS: A
  5. The most commonly used fluoroscopic viewing system is a. mirrors. b. real-time video monitors. c. dry laser images. d. videotape. - Answer - ANS: B
  6. Cassette-based spot filming has been replaced by a. digital photospots. b. CCD chips. c. dry laser films. d. CR cassettes. - Answer - ANS: A
  7. Digitization of the fluoroscopic image permits a. image post-processing. b. transfer via PACS. c. electronic archival.

d. all of the above - Answer - ANS: D

  1. Digital fluoro pixels are between ____ μm. a. 100 and 150 b. 150 and 200 c. 200 and 300 d. 300 and 400 - Answer - ANS: C
  2. Flat panel digital detectors used for fluoroscopy use a. amorphous silicon as the digital detector. b. a cesium iodide scintillator. c. TFT technology. d. all of the above - Answer - ANS: D
  3. In order to reduce visible noise using digital fluoroscopic detectors, a. the kVp is increased. b. pixels are binned. c. pixels are amplified. d. larger patients are not studied fluoroscopically. - Answer - ANS: B
  4. All of the following are common post-processing features with digital fluoroscopy EXCEPT a. last image hold (LIH). b. digital subtraction. c. window level and width d. edge enhancement. - Answer - ANS: A
  5. During fluoroscopy, the principal source of radiation exposure to personnel in the room is the a. fluoroscopy x-ray tube. b. patient. c. radiologist. d. image detector. - Answer - ANS: B
  6. In a fluoroscopy system, the x-ray tube and image receptor must be interlocked in order to enable fluoroscopy. This classifies the image receptor as the a. secondary barrier. b. primary barrier. c. scatter barrier. d. principal barrier. - Answer - ANS: B
  1. Mobile fluoroscopic systems are different from fixed systems in that they a. do not have a primary barrier. b. do not use video displays. c. have separate fluoroscopy and radiographic tubes. d. have a minimum SOD of 12 inches. - Answer - ANS: D
  2. When using automatic brightness control (ABC), it is important to remember that a. image brightness is not dose related. b. a dark video image indicates photon starvation to the receptor. c. collimation and part placement do not impact video image quality. d. none of the above - Answer - ANS: B
  3. Digital fluoroscopy typically a. uses pulsed x-ray exposures timed with the detector b. uses indirect detector technology with thin film transistors (TFT). c. provides resolution of 1-2 lp/mm. d. all of the above - Answer - ANS: D MATCHING Match the following choices with the correct statement as each relates to fluoroscopic technology. a. input phosphor g. output phosphor b. 1-3 R/min h. CsI c. 10 R/mn i. photocathode d. fluoroscopic carriage j. ZnS-CdS:Ag e. brightness gain k. vignetting f. primary barrier l. TFT resolution
  4. image intensifier or digital detector
  5. input phosphor material
  6. mechanical attachment for detector and fluoroscopic controls
  7. uniform across the detector surface array
  8. a function of flux and image minification
  9. loss of brightness and resolution on the edge of the image
  10. output phosphor material
  11. emits electrons via the photoelectric effect
  12. maximum exposure rate
  13. converts electrons to light - Answer - 1. ANS: F
    1. ANS: H
    2. ANS: D
    3. ANS: L
    4. ANS: E

6. ANS: K

7. ANS: J

8. ANS: I

9. ANS: C

10. ANS: G

PROBLEM

  1. What is the magnification factor for an image viewed with an image intensification tube with an input screen diameter of 23 cm that is using a 13 cm diameter area during magnification? - Answer - ANS:
  3. What is the magnification factor for an image viewed with an image intensification tube with an input screen diameter of 23 in. that is using a 10 in. diameter area during magnification? ANS: - Answer - ANS: 2.
  4. What is the minification gain for an image intensification tube with an input screen diameter of 5 in. and an output diameter of 1 in.? - Answer - ANS: 25
  5. What is the minification gain for an image intensification tube with an input screen diameter of 10 in. and an output diameter of 2 in.? * - Answer - ANS: 25 *
  6. What is the total brightness gain for an image intensification tube with a minification gain of 25 and a flux gain of 50? - Answer - ANS: 1,