Share Registry Review Chapter 12 and 13
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What are the four aspects of image quality?
Brightness, Contrast, Spatial resolution and Distortion
What are the prime factors used to create the image?
kVp, mAs and distance
What are the two visibility factors in determining image quality?
Brightness and contrast
What are the two geometric factors in determining image quality?
spatial resolution and distortion
What two indicators can show that an image taken is acceptable?
EI or DAP
What is the function of contrast?
to make details visible
What factors affect spatial resolution?
OID, SID, FSS, Patient factors, motion, angle of tube
How is SID related to exposure rate and receptor exposure?
As SID increases , exposure rate decreases and receptor exposure decreases
The use of optimum kV for small, medium and large body parts is the premise of?What type of charts do we use?
APR, fixed kV and variable mAs charts
mAs is a quantitative factor and is __________________ _____________________ to the number of photons delivered to the IR AND the patient.
directly proportional
What are the GCF for various grids?
no grid- 1
5:1 - 2
6:1- 3
8:1- 4
10:1- 12:1- 5
16:1 - 6
The number of bits per pixel is called?
bit depth
Contrast is a quality related to the _____________ of the radiographic image.
visibility of structures
Difference in the brightness levels or densities is:
image contrast
Spatial resolution is improved with increased ? hint* think equipment
increased pixel density
The emission of light when stimulated by a high-intensity laser beam is?
photostimulable luminescence
