CPI CMP 200 Series Service Manual page 150

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