FREE AND STUDY GAMES ABOUT FLUORO EXAM

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FREE AND STUDY GAMES ABOUT FLUORO EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -74 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Which of the following terms refers to the size ratio between the input and output phosphor screens

Answer:

Minification gain

Question 2: Remnant radiation interacts with what part of the image intensifier

Answer:

Input Phosphor Question 3: The input screen is coated with a Phosphor that converts x-ray photons to

Answer:

Light photons Question 4: Excessive lighting in the fluoroscopy room:

Answer:

May result in increasing the technical operating factors

Question 5: If the entrance skin dose is measured from the surface of the tabletop, the x-ray source is located

Answer:

Under the table Question 6: The television monitor used for viewing the fluoroscopic image contains

Answer:

• Cathode Ray Tube (CRT)

• Control for regulating contrast

• Control for regulating brightness

Question 7: The ability of the image intensifier to increase the overall illumination level of the image is called its

Answer:

Brightness gain Question 8: The ability of an imaging system to differentiate small objects that are closely

spaced as separate objects is referred to as:

Answer:

Resolution Question 9: The "visibility" of mottle in the virtual image is determined by the ___ of the system

in use:

Answer:

• Resolution

• Sensitivity

• Contrast level

Question 10: The mottle level of an image can be adjusted by

Answer:

• changing mA

• changing kVp

• changing the exposure factors

• increasing the number of available x-ray photons

Question 11: When referring to a lens system, a higher 'f-number' will result in less ___ being available to form an image on cine film

Answer:

Light

Question 12: Minification gain formula

Answer:

Diameter of input screen 2/by diameter of output screen 2 Question 13: Image "lag" is generally considered to be a disadvantage, however, a latent effect

of lag when using a vidicon TV camera is:

Answer:

• Minimizes the effects of quantum mottle
• Averages out the statistical fluctuations

Question 14: When switching from a 6-inch magnification mode to a 9-inch mode, how will the patient's radiation dose be altered

Answer:

Decreased by 2.25 times Question 15: The component in an image intensifier that regulates or changes the amount of magnification in the vertual image is the

Answer:

Electrostatic Lenses Question 16: When quality factor called spatial frequency is increased, so does the

Answer:

Number of line pairs/mm Question 17: What function does the output phosphor serve in an image intensifier?

Answer:

Convert the energy of electrons bombarding it into visible light

Question 18: The total filtration used in fluoroscopic x-ray tubes operating above 125 kVp must

be a least:

Answer:

3.0 mm Al equivalent

Question 19: Size distortion is primarily caused by

Answer:

Object-to-image distance (OID) Question 20: The statistical image quality of a fluoroscopic imaging system is primarily

determined by the number of:

Answer:

X-ray photons

Question 21: The output screen converts photoelectrons into

Answer:

Light Question 22: Fluoroscopic magnification is made possible by varying the voltage applied to the

Answer:

Electrostatic Lenses Question 23: The greatest limiting factor concerning resolution for fluoroscopic systems is the

Answer:

Video Monitor Question 24: The exposure rate at the tabletop may not exceed five rads per minute except

Answer:

• when using the ABC on large patients

• during magnification mode

• where higher exposure rates are allowed