Image Quality

Description

ARRT Radiologic Procedures I Flashcards on Image Quality, created by RadTech Fairy on 08/31/2016.
RadTech Fairy
Flashcards by RadTech Fairy, updated more than 1 year ago
RadTech Fairy
Created by RadTech Fairy over 7 years ago
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Resource summary

Question Answer
kV Kilovoltage controls the energy (penetrating power) of the x-ray beam
mA Milliamperage controls the quality or number of x-rays produced
ms Exposure time controls the duration of the exposure usually in milliseconds
CONTRAST the difference in density between adjacent areas of a radiographic image
DENSITY the amount of "blackness" on the processed radiograph
What is the primary controlling factor of DENSITY? mAs controls the quantity of x-rays emitted from the x-ray tube AND the duration of exposure
What's the primary controlling factor of CONTRAST? kV higher kV = lower contrast lower kV = higher contrast
Annode Heel Effect The patient should be positioned so the thicker portion of the body (part) is at the CATHODE end of the x-ray tube The thinner part of the body (part) should be positioned under the ANODE
What happens to your image if the CR is not centered on the grid? The image will be laterally off center
What happens to your image if the GRID is off-level? Image will be blurred
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