THEORY GUIDE Radiography Theory
10DEC05
TG4825-1
Page
16 of 120
• Recording medium - film
• Output medium - film
• Storing medium - film
• Recording medium - STORAGE
PHOSPHOR SCREEN
• Output medium - film, paper, digital display
• Storing medium - digital
Image density and contrast are controlled
by kilovolts peak (kvP), milliampere
seconds (mA.s), and film type.
Density and contrast are controlled by image
processing parameters. kvP, and mA.s continue
to be important image control factors for details
and noise in the digital image.
Viewing quality can only be improved by
increasing the brightness of the LAMP
that illuminates the film.
Digital images can be improved by processing
on a computer to change the density, contrast,
sharpness, and other factors.
The quality of films that are not exposed
correctly cannot be improved.
Images that were not exposed correctly can be
improved. For example, software parameters
can improve image density and contrast.
Analog Screen/Film Systems Digital CR Systems
To Next Page
Loading...
Need help?
General
