CPI Canada Inc
Reproducibility, Linearity, & HVL Testing
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X-Ray Generator Service Manual Supplement 740917-00 Rev. C
Page 5
3.0 REPRODUCIBILITY
(Cont)
3 point = Maximum kV, minimum mA, 100 ms.
2 point = Maximum kV, minimum mAs.
mAs = __________
EXP No.
DOSE (K)
mGy
DIFFERENCE DIFFERENCE
2
1
2
3
4
5
K =
________
Calculate each of the differences
ie: DIFF
1
= K
1
- K.
Repeat for each remaining K
value.
Square each difference. Then
calculate the sum of the difference
2
.
Sum of difference
2
= _________
Calculate standard deviation (S) using formula at beginning of this section: S = __________
Calculate reproducibility = S = _________ (not to exceed 0.045)
K
Table 2: Reproducibility
3 point = 50% of maximum kV, 250 ms, mA to give 100 - 500 mR (0.9 – 4.4 mGy) dose.
2 point = 50% of maximum kV, mAs to give 100 - 500 mR (0.9 – 4.4 mGy) dose. mAs = __________
EXP No.
DOSE (K)
mGy
DIFFERENCE DIFFERENCE
2
1
2
3
4
5
K =
________
Calculate each of the differences
ie: DIFF
1
= K
1
- K.
Repeat for each remaining K
value.
Square each difference. Then
calculate the sum of the difference
2
.
Sum of difference
2
= _________
Calculate standard deviation (S) using formula at beginning of this section: S = __________
Calculate reproducibility = S = _________ (not to exceed 0.045)
K
Table 3: Reproducibility
