CPI Canada Inc.
Interfacing and Programming
3C
Use and disclosure is subject to the restrictions on the title page of this CPI document.
CMP 200
®
X-Ray Generator Service Manual Ch # 901476-04 Rev. C
Page 3C-81
3C.11.4 DAP Calculation Worksheet (Cont)
Refer to the sample DAP worksheet below:
STEP ACTION
RESULT
1. Measured
dose:
____23.3_____ mR
Convert mR to mGy if necessary by multiplying mR X
0.00873. Example 23.3 mR X 0.00873 = 0.203 mGy.
____0.203____ mGy
2.
Measure and record the exposed area of the film (Length
X Width).
____13.6_____ Length (cm)
____13.2_____ Width (cm)
Calculate the exposed area in cm
2
(length X width).
___179.52____ Area (cm
2
)
3.
Multiply the dose in mGy (step 1) X the area in cm
2
(step
2). This will yield the actual dose-area product, in
mGycm
2
.
____36.44____ DAP (mGycm
2
)
4.
Record the DAP, in mGycm
2
, as displayed on the
console.
____40_______ DAP (mGycm
2
)
5.
Calculate the percentage error: Refer to the example at
the end of this section.
____-8.9______ % error
Sample percentage error calculation (step 5):
(36.44 - 40)
40
X 100 =
-3.56
40
X 100 = -8.9 %
