6 Automatic exposure modes
50 GE Healthcare 86500-IMG rev 3
6.2 OPERATION IN AUTO TIME MODE
1 Select kV and Density. The exposure control system will determine
the mAs/ correct exposure time when you make the exposure. A LED
light indicates that the Auto Time mode has been selected.
2 Change the selected filter if necessary.
Fig 6.2. The mode display in Auto Time mode
NOTE!
If a correct optical density could not be reached, the Exposure monitor will
terminate the exposure in 50 ms. If this occurs, change the film cassette
and repeat the procedure, selecting a higher kV.
6.3 OPERATION IN MANUAL MODE
1 Select required kV and mAs. The system will select the correct
exposure time (which depends on the selected mAs value).
2 Change the filter selection if necessary.
Fig 6.3. The mode display in Manual mode
6.3.1 Adjustment of the mAs-values in Manual mode
Select the mAs setting. Pressing the mAs+ button increases the mAs value
and pressing mAs- button decreases the mAs value. The following mAs
values may be selected.
* not allowed in N.Y.
23456
8 10121620
25 32 40 50 63
80 100 125 150 175
200 250 300 350* 400*
450* 500*
Table 6.1 Selection of mAs values
FOR TRAINING PURPOSES ONLY!
NOTE: Once downloaded, this document is UNCONTROLLED, and therefore may not be the latest revision. Always confirm revision status against a validated source (ie CDL).
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