![background image](http://html1.mh-extra.com/html/cpi/cmp-200/cmp-200_service-manual_2675020253.webp)
Reproducibility, Linearity, & HVL Testing
CPI Canada Inc
5.0
H.V.L. EVALUATION (Cont)
ADDED ALUMINUM FILTER
DOSE (mGy) RELATIVE
TRANSMISSION
0 2.17
0 2.13
0 2.16
0 (Average of above three readings)
2.15
1.00
2
(total 2 mm)
1.41
.66
1
(total 3 mm)
1.14
.53
3
(total 6 mm)
0.61
.28
Table 12: HVL dose values (example)
Figure 3: HVL plot (example)
By interpolating the thickness of Al at a relative transmission value of 0.5, it can be seen that the HVL is
approximately 3.3.
Use and disclosure is subject to the restrictions on the title page of this CPI document.
Page 12
Rev. C X-Ray Generator Service Manual Supplement 740917-00