FREE AND STUDY GAMES ABOUT CH 25 DIGITAL RAD

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FREE AND STUDY GAMES ABOUT CH 25 DIGITAL RAD

EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -108 Questions and Answers -format set of multiple-choice -Expert- Explanation Question 1: The appropriate anatomical menu is selected by the body part by the _ when the imaging plate is loaded into the reading unit.

Answer:

Radiographer Question 2: grounds the plate to eliminate electrostatic problems and absorb light to increase sharpness

Answer:

conductor layer

Question 3: The most common phosphor with characteristics favorable for CR is

Answer:

barium flurohalide bromide, iodides with europium activators

Question 4: Which system uses a photostimulable storage phosphor imaging plate

Answer:

cassette base

Question 5: The Fuji computed radiography (CR) system uses an S number to assist in evaluating exposure and are

Answer:

INVERSELY PROPORTIONAL

Question 6: It is critical to adhere to uniform positioning and collimation procedures when using a CR system.

Answer:

T

Question 7: Over exposure in digital yields good images with unnecessary but

Answer:

high dose to the patient.Question 8: This electrical signal is, in turn, converted to a unique digital value for that particular level of

Answer:

luminescence

Question 9: The latent image will lose about ___ % of its energy in __hrs

Answer:

25,8 Question 10: T/F There are certain expectations that need to be met when placing more than one image per plate.

Answer:

T

Question 11: The imaging plate is scanned by a___ laser beam

Answer:

helium-neon Question 12: What does not release all the energy absorbed from the incident x-ray beam

Answer:

Fluorohalides luminesce

Question 13: The___ and ____ of an imaging plate can occur in a single processor unit

Answer:

reading, erasing

Question 14: After reading the imaging plate the electrons to return to a

Answer:

lower energy state Question 15: The imaging plate is more sensitive to scatter both__ and___it is sensitized through exposure to the x-ray beam.

Answer:

before and after

Question 16: what begins with an x-ray exposure to the imaging plate.

Answer:

Image acquisition Question 17: prevents light from erasing data on the imaging plate or leaking through the backing

Answer:

light shield layer and backing layer Question 18: Digital Radiography can be divided into two groups:

Answer:

Computed Radiography (CR) Cassette-based (indirect digital) Direct Digital Radiography (DR) Cassette-less (direct digital)

Question 19: Image acquisition begins with x-ray exposure to the

Answer:

imaging plate

Question 20: Failure to use a high enough___ setting produces quantum mottle

Answer:

MAS

Question 21: T/F A cassette base system can be used in a bucky or for portables

Answer:

True

Question 22: Factors that produce low contrast include

Answer:

High KVP No grid or inadequate grid efficiency Inadequate beam limitation (i.e., collimation) Increased part size or tissue thickness

Question 23: The photostimulable phosphor imaging plates layers include

Answer:

protective layer, phosphor layer,support layer, conductor layer, light shield layer,backing layer Question 24: The imaging plate phosphor will absorb more___ than the rare-earth phosphor and film,

Answer:

low-energy scatter Question 25: Kilovoltage for computed radiography will control____ similar to film radiography

Answer:

contrast Question 26: A good scintillator yields many light photons for each incoming x-ray photon; __ to __ visible photons out per 1kV of incoming x-ray energy are typical.

Answer:

20,50