Canon OMNERA 400A, Operator'S Manual

Page: 59 / 156

Operator´s Manual
0073-095-418-EN Rev. 5.1 OMNERA®
2020-09-25 Page 53
3.2 Exposure
CAUTION!
The operator is responsible for validation of the exposure parameters before perform-
ing an exposure.
Exposures are done by using the hand control.
3.2.1 Exposure Hand Control
A. Exposure control in normal position.
B. Exposure control in preparation position.
C. Exposure control in exposure position.
A B
C
Fig. 3-28 Exposure hand control
3.2.2 Exposure Index
After exposure the Exposure Index (EXI) and Deviation Index (DI) will be shown in the image,
in order to indicate the dose level. See further description of the indexes below.
The exposure index, is a measure of the amount of exposure received by the detector and
depends on mAs, the total detector area irradiated respective the beam attenuation. It is indi-
cative of the image quality.
3.2.3 Deviation Index
The deviation index, DI, gives an indication of the dose level used for capturing the image.
The DI value compares the current standard EXI with the target EXI.
The target EXI is defined by the user. See Imaging system for further description.
User Interface
Exposure