Discovery QDR Series Technical Manual
4-42
Sample ARRC.TXT (Array Calibration) File
Block=13,809 Factory
Block=14,559 Factory
Block=15,309 Factory
[HeatUnits]
BDelay=30 Factory Boot Up Delay
MaxVHU=70000 Factory Maximum Vinnie Heat Units
CoolRate=250 Factory Cooling Rate of VHU
Vhus1=90 Factory X-Ray Mode 1
Vhus2=250 Factory X-Ray Mode 2
Vhus3=300 Factory X-Ray Mode 3
Vhus4=120 Factory X-Ray Mode 4
Vhus5=90 Factory X-Ray Mode 5
Vhus6=2100 Factory X-Ray Mode 6
Vhus7=700 Factory X-Ray Mode 7
Vhus8=1000 Factory X-Ray Mode 8
ARRC.TXT Variables Set by… Descriptions
USE = 0
Factory
A variable used by the software to determine what
parameters to use for scatter correction. It can be set
to one of four possible values (0, 1, 2, or 3) but should
always be set to 0.
Q4 = 0.651 1.013 1.461
Factory
These numbers are used for all array modes. The
numbers are determined by measuring a three-step
(thin, medium, and thick) block phantom at the
factory.
Q4_HAT = 0.617 0.980
1.445
Factory Similar to Q4, except the measurements are taken on
the Step phantom with extra absorber material placed
on top of it.
T4 = 2.628 Factory Thickness (height in inches) of the block phantom.
T4_HAT = 7.00 Factory Thickness (height in inches) of the block phantom
with extra absorber.
DELTA0 = 0.493 Factory Thickness of tissue segment in the filter wheel.
T0_N = 6.85 Fact. or F.S. Overall height of the phantom (in inches) shipped
with the Discovery. (Varies with each phantom.)
HIA_N = 1305.39 Automatic Hi Air,
LOA_N = 1622.56 Automatic Low Air,
HIT_N = 1389.09 Automatic Hi Tissue, and
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