QDR
4500 Technical Manual
4-42
ARRC.TXT Variables Set by… Descriptions
T0_NL = 6.00 Factory Width of the phantom shipped with the QDR
4500. This value is the same for all phantoms.
HIA_NL = 1149.08 Automatic Hi Air,
LOA_NL = 1187.00 Automatic Low Air,
HIT_NL = 1231.63 Automatic Hi Tissue, and
LOT_NL = 1282.07 Automatic Low Tissue attenuations values in "raw A/D"
numbers.
These values are used to determine the
thickness of a patient being scanned in the
lateral
scan mode. They are updated whenever
a
lateral
scan is added to the QC database or in
FSCAL.
ACFL = 1.021550 Fact. or
F.S.
Area Correction Factor for Lateral scans.
BCFL = 1.005450 Fact. or
F.S.
Bone Correction Factor for Lateral scans.
HIA_NF = 1319.16 Factory Hi Air,
LOA_NF = 1634.86 Factory Low Air,
HIT_NF = 1402.73 Factory Hi Tissue, and
LOT_NF = 1730.71 Factory Low Tissue attenuations values in "raw A/D"
numbers.
Factory values for
AP array
scans. Used as
reference for the software to determine if the
Hi/Low values are out of factory range.
HIA_NLF = 1149.08 Factory Hi Air,
LOA_NLF = 1187.00 Factory Low Air,
HIT_NLF = 1231.63 Factory Hi Tissue, and
LOT_NLF = 1282.07 Factory Low Tissue attenuations values in "raw A/D"
numbers.
Factory values for
lateral
scans. Used as
reference for the software to determine if the
Hi/Low values are out of factory range.
QC_HILO_MIN = 50.0 Factory Day-to-day drift check warning message limit.
QC_HILO_MAX = 100.0 Factory Day-to-day drift check error message limit.
QC_HILO_FACT_MAX =
200.0
Factory Long-term drift check warning message limit.
QC_HILO_FACT_MIN =
100.0
Factory Long-term drift check error message limit.
UPDATED = 06/20/94
12:00:00
Automatic Date and time the ARRC.TXT file was last
updated.
UPDATED_N = 11/09/94
QC Version 8.03
Automatic Date and version of QC program which updated
the Hi/Low values for a daily QC AP array scan.
UPDATED_NL = Automatic Date and version of QC program which updated
the Hi/Low values
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