FREE RADIOLOGY AND STUDY GAMES ABOUT CARLTON

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ADLER CH40 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -101 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Process of turning light photons into electrons

Answer:

photoemission

Question 2: Illumination is measured in what?

Answer:

lumen per square meter or lux

Question 3: Principle result of multifield image intensification

Answer:

reduce the field of view and thereby magnify the image Question 4: Photoelectrons that arrive at the output phosphor provide ____ times as many light photons than were created

Answer:

50-75 times

Question 5: how is magnification gain calculated

Answer:

input screen diameter / diameter of input screen used during magnification

Question 6: image intensifier improved fluoroscopy by increasing image

Answer:

brightness

Question 7: major cause of size distortion in fluoro

Answer:

OID

Question 8: Absorbs electrons & emits light phosphors

Answer:

output screen

Question 9: drawback of cine film

Answer:

increased patient dose

Question 10: Area where the cones are concentrated in the center of the retina

Answer:

fovea centralis Question 11: Ratio of the square of the diameter of the input phosphor to the square of the diameter of the output phosphor

Answer:

minification gain

Question 12: Sensitive to low levels of light, 2 lux

Answer:

rods

Question 13: Diagnostic mA range

Answer:

50 to 1200mA

Question 14: Credited with inventing fluoroscope

Answer:

Thomas Edison 1896

Question 15: Electrons accelerated from cathode to anode

Answer:

output phosphor

Question 16: Minification gain x flux gain

Answer:

brightness gain

Question 17: In contact with input phosphor to prevent divergence of light beam

Answer:

photocathode

Question 18: lead gloves used lead content

Answer:

.25mm Pb/eq

Question 19: Thin part of glass envelope in anode

Answer:

window

Question 20: image intensifier improved fluoroscopy by increasing image___

Answer:

brightness

Question 21: Positively charged, draws electrons away from the photocathode at a tremendous velocity

Answer:

accelerating anode

Question 22: Steer and accelerate the electrons to the anode

Answer:

electrostatic grids

Question 23: radiographer's responsibility in fluoroscopy

Answer:

inform others in room to wear lead apron, do not initiate fluoro until all persons have complied Question 24: Ratio of the illumination intensity at the output phosphor to the radiation intensity of the input phosphor

Answer:

brightness gain Question 25: Used to transmit part of the beam to the tv camera and remainder to the film camera

Answer:

beam splitting mirror Question 26: Switches the mode from larger to smaller, increases voltage on electrostatic focusing lenses

Answer:

multifield image intensification

Question 27: Absorbs x-ray photons and emits light photons

Answer:

input phosphor

Question 28: what comes last in the image intensifier

Answer:

zinc cadmium sulfide screen