 x*See
DIS catalog system speed Index for your current t Cassette/Screens
Speeds
System Speeds are based on,
-
Type of film being used full speed or half speed or
single emulation ,
-
Distance from X-Ray tube to film (1/2 distance
requires 1/4 the exposure and 2 times distance requires 4 times
exposure),
-
Grid Type, (6:1 add 6 kVp or multiply time by 1.5)
(8:1 grid add 10 kVp or double time)
Example when used with full speed green 400 film for 3M
3/12= 600 system speed,
2/6 = 300 system speed
Example when used with detail speed green film for 3M
6/12= 300 system speed,
2/6= 150 system speed |