Linearity - CPI CMP 200 Series Service Manual

CPI Canada Inc
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 K (kerma) in mGy for tables 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 K values, calculate X
4. Calculate the coefficient of linearity, L, as per tables 8 and 9.
mAs = __________
EXP No.
1
2
3
4
5
Table 6: Linearity
mAs = __________
EXP No.
1
2
3
4
5
Table 7: Linearity
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X-Ray Generator Service Manual Supplement
DOSE (mGy)
K = ________
DOSE (mGy)
K = ________
Reproducibility, Linearity, & HVL Testing
, X , X , and X
3 4 6
740917-00 Rev. C
in tables 8 and 9.
7
Page 7