CPI Canada Inc
Reproducibility, Linearity, & HVL Testing
X-Ray Generator Service Manual Supplement 740917-00 Rev. A
Page 7
4.0 LINEARITY
1.
Record two additional series of dose measurements for entry into tables 6 and 7:
•
For table 6, use settings per table 3 EXCEPT use an mA (or mAs) value adjacent to the mA
(or mAs) setting used in table 3.
•
For table 7, use settings per table 4 EXCEPT use an mA (or mAs) value adjacent to the mA
(or mAs) setting used in table 4.
•
Record the mAs in the header of tables 6 and 7 as per 3.0 step 3.
1.
Calculate and record the average dose mR for table 6 and 7.
2.
Record the preselected mAs and the average dose values taken from tables 3 and 4, and from
tables 6 and 7, at the top of the next page.
3.
Using the appropriate mAs and mR values, calculate X
3
, X
4
, X
6
,
and
X
7
in tables 8 and 9.
4.
Calculate the coefficient of linearity, L, as per tables 8 and 9.
mAs = __________
EXP No.
DOSE (mR)
1
2
3
4
5
mR = ________
Table
6:
Linearity
mAs = __________
EXP No.
DOSE (mR)
1
2
3
4
5
mR = ________
Table
7:
Linearity
