Kodak DirectView CR 825 Theory Manual page 16

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