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FREE AND STUDY GAMES ABOUT IEO QUIZ4 EXAM
QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -33 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation
Question 1: What is the purpose of fluoroscopy
Answer:
Image in motion Question 2: Fluoroscopy for an air contrast barium enema is generally done at ____kVp
Answer:
80-90
Question 3: The input phosphor converts___to ____
Answer:
x-rays, light Question 4: What factor increases when the kinetic energy across the image intensifier increases
Answer:
Voltage
Question 5: With image intensification the light level is raised to____vision
Answer:
Photopic
Question 6: The ____is the product of minification gain and flux gain
Answer:
brightness gain
Question 7: Who invented the fluoroscope
Answer:
Thomas Edison
Question 8: Describe purpose of electrostatic lenses
Answer:
guides the electrons
Question 9: What is the milliamperage used during fluoroscopy
Answer:
- mA
Question 10: The ___in the retina are stimulated by ___light, the ___are stimulated by ___light
Answer:
rods, low, cones, bright Question 11: The capability of an image intensifier to increase the illumination level of the image is called its____
Answer:
brightness gain Question 12: Fluoroscopy was developed so that radiologists could view ____images
Answer:
dynamic
Question 13: Light produced at the output phosphor of the image intensifier has been increased ___times in intensity
Answer:
50-75 Question 14: The time it takes to turn on the digital fluoroscopy x-ray tube and reach selected mA and kVp is the ____time
Answer:
Interrogation Question 15: What affect will using a smaller input phosphor have on magnification
Answer:
increase
Question 16: The output phosphor of the image intensifier is composed of
Answer:
zinc cadmium sulfide
Question 17: A charge-coupled device used in digital fluoroscopy provides high
Answer:
Spatial resolution, S/N ratio, DQE
Question 18: Viewing the fluoroscopic image in magnification mode increases___
Answer:
contrast resolution, spatial resolution, and patient dose
Question 19: What affect will using a smaller input phosphor have on detail
Answer:
increase
Question 20: Electrons hit the ____after exiting the anode
Answer:
output phosphor
Question 21: The combination of temporal and energy subtraction techniques is called ____
Answer:
Hybrid subtraction Question 22: Digital fluoroscopy with a charge-couple device has lower ____and higher ____ than conventional fluoroscopy
Answer:
patient dose, light sensitivity Question 23: x-rays that exit the patient and enter the image intensifier first interact with the ___
Answer:
input phosphor Question 24: Automatic brightness control maintains the brightness of the image by varying____
Answer:
kVp and mA
Question 25: An image intensifier tube is identified by the diameter of its___
Answer:
input phosphor
Question 26: Digital fluoroscopy uses at least ___monitor(s)
Answer:
2 Question 27: The ratio of incident x-rays on the input phosphor to light photons exiting the output phosphor is called ____gain
Answer:
Flux
Question 28: What affect will using magnification have on dose
Answer:
increase
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