Hologic DISCOVERY C - Page 242

Discovery QDR Series Technical Manual
9-6
9.1.3.3.4 Hi Gain.
This is a spinner control with a range of 0 to 11. Changing Hi Gain changes the displayed
detector values for the Hi portions of the current segment. The associated actual gain
values are shown in the following table.
9.1.3.3.5 Lo Gain.
This is a spinner control with a range of 0 to 11. Changing Lo Gain changes the displayed
detector values for the Lo portions of the current segment. The associated actual gain
values are shown in the above table.
9.1.3.3.6 Xray Mode.
This is a spinner control with a range of 0 to 8. The default mode is 3. This control
determines the voltage, current and duty cycle for the x-ray generator. Most scans use X-
ray Mode 3, Whole Body uses 3 and IVA (single energy) uses 6. The following table
shows the full set of defined X-ray modes.
Gain Code A/D Gain MUX Gain Total Gain
0 1 2 1
1 1 2 2
2 1 4 4
3 1 8 8
4 2 1 2
5 2 2 4
6 2 4 8
7 2 8 16
8 4 1 4
9 4 2 8
10 4 4 16
11 4 8 32
X-Ray Mode Pulse Cycle Peak Ma Average Ma High KV Low Kv
0 0 -- -- -- --
1 50% 3 0.75 140 100
2 50% 10 2.5 -- 100
3 50% 10 240 100
4 50% 3 0.75 -- 80
5 50% 3 0.75 140 80
6 100% 10 5.0 140 --
7 50% 10 2.5 140 --
8 100% 10 5.0 -- 100