Radiology Physics Chapter 36 Fluoroscopy Questions With
Complete Solutions
10. The photocathode absorbs ____ and emits ____.
a. x-ray photons; light photons c. light photons; x-ray photons
b. light photons; electrons d. electrons; light photons Correct
Answers ANS: B
11. Electrostatic lenses are used to accelerate and focus
a. light photons. c. electrons.
b. x-ray photons. d. scattered photons. Correct Answers ANS: C
12. The primary ____ occurs from the acceleration and focusing
of the electron beam.
a. phosphorescence c. magnification
b. minification d. brightness gain Correct Answers ANS: D
13. The output screen absorbs ____ and emits ____.
a. electrons; light photons c. light photons; electrons
b. electrons; x-ray photons d. light photons; x-ray photons
Correct Answers ANS: A
14. The input screen is ____ in shape. DIF: Medium
a. oval c. concave
b. elliptical d. convex Correct Answers ANS: C
15. The shape of the input screen helps to control
a. distortion. c. scatter
b. SID. d. minification. Correct Answers ANS: A
16. The photocathode is composed of ____ metals.
, a. lead-based c. photoemissive
b. photoabsorptive d. electrostatic Correct Answers ANS: C
17. Photoemissive materials absorb ____ and emit ____.
a. x-ray photons; light photons c. light photons; x-ray photons
b. light photons; electrons d. x-ray photons; electrons Correct
Answers ANS: B
18. Electrostatic lenses are actually DIF: Medium
a. concave optical lenses. c. planar lenses.
b. convex optical lenses. d. charged electrodes. Correct
Answers ANS: D
19. The greater the voltage supplied to the electrostatic lenses,
the ____ the acceleration and the ____ the focal point to the
input screen.
a. greater; farther c. lesser; smaller
b. greater; closer d. greater; larger Correct Answers ANS: B
2. Fluoroscopy is the domain of the DIF: Medium
a. radiographer. c. radiation physicist.
b. radiologist. d. quality control technologist. Correct Answers
ANS: B
2. 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: Correct Answers ANS: 2.3
20. Total brightness gain is
a. a measure of the increase in image intensity.
Complete Solutions
10. The photocathode absorbs ____ and emits ____.
a. x-ray photons; light photons c. light photons; x-ray photons
b. light photons; electrons d. electrons; light photons Correct
Answers ANS: B
11. Electrostatic lenses are used to accelerate and focus
a. light photons. c. electrons.
b. x-ray photons. d. scattered photons. Correct Answers ANS: C
12. The primary ____ occurs from the acceleration and focusing
of the electron beam.
a. phosphorescence c. magnification
b. minification d. brightness gain Correct Answers ANS: D
13. The output screen absorbs ____ and emits ____.
a. electrons; light photons c. light photons; electrons
b. electrons; x-ray photons d. light photons; x-ray photons
Correct Answers ANS: A
14. The input screen is ____ in shape. DIF: Medium
a. oval c. concave
b. elliptical d. convex Correct Answers ANS: C
15. The shape of the input screen helps to control
a. distortion. c. scatter
b. SID. d. minification. Correct Answers ANS: A
16. The photocathode is composed of ____ metals.
, a. lead-based c. photoemissive
b. photoabsorptive d. electrostatic Correct Answers ANS: C
17. Photoemissive materials absorb ____ and emit ____.
a. x-ray photons; light photons c. light photons; x-ray photons
b. light photons; electrons d. x-ray photons; electrons Correct
Answers ANS: B
18. Electrostatic lenses are actually DIF: Medium
a. concave optical lenses. c. planar lenses.
b. convex optical lenses. d. charged electrodes. Correct
Answers ANS: D
19. The greater the voltage supplied to the electrostatic lenses,
the ____ the acceleration and the ____ the focal point to the
input screen.
a. greater; farther c. lesser; smaller
b. greater; closer d. greater; larger Correct Answers ANS: B
2. Fluoroscopy is the domain of the DIF: Medium
a. radiographer. c. radiation physicist.
b. radiologist. d. quality control technologist. Correct Answers
ANS: B
2. 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: Correct Answers ANS: 2.3
20. Total brightness gain is
a. a measure of the increase in image intensity.
