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Chapter 7: radiographic imaging
Terms in this set (26)
Process by which a beam of x-ray photons is altered as it passes through matter.
Photostimuable phosphor plate is used in which type of radiography as an image receptor?
The chief controlling factor of radiographic contrast in film/screen radiography is:
What mAs value would result using the 500 mA setting at 0.25 second?
Which image receptor system does NOT use light during exposure?
Direct Conversion (DR).
A radiograph is made using 40 mAs at a 40 inch SID. If the image must be repeated at 72 inch SID, what mAs value is necessary to maintain the same exposure?
The 15% rule helps explain the effect of _____ on exposure.
Which is NOT a radiographic contrast medium?
The most common cause of radiographic unsharpness is:
What term in digital imaging is used to describe the process the computer uses to produce a uniform brightness and contrast regardless of the exposure?
Loss of radiation energy as a result of passing through an absorbing material, such as the human body.
Image that must be processed to convert it to a visible image (radiograph).
This converts the x-ray energy to light, and light energy creates chemical changes in film.
What is the overall darkness or blackness of an image?
T/F : mAs represents the quantity of x-ray production.
Controls x-ray beam penetration.
What allows a lower x-ray dosages to patients?
What are two methods of digital image capture?
Pixel elements & Rectangular array.
If motion is a factor when taking an x-ray of someone, you should use which guidelines?
Short exposure time.
What type of radiation is when x-ray photons that have interacted and changed direction?
This is when materials allow x-rays to pass thru relatively easy:
This is when materials are not easily traversed by x-ray photons:
Controls the x-ray's beam quality.
Uses x-rays to create real-time images of patients anatomy and function.
Is the difference in adjacent densities of a radiographic film.
Is a misrepresentation of size or shape.
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