Principes généraux de protection contre l’exposition externe
333
kVp
Plomb
Béton
Plâtre
α (mm –1 )
β (mm –1 )
γ
α (mm –1 )
β (mm –1 )
γ
α (mm –1 )
β (mm –1 )
γ
25 4,952 x 10 1 1,94 x 10 2 3,037 x 10 -1 3,904 x 10 -1
1,645
2,757 x 10 -1 1,576 x 10 -1 7,175 x 10 -1 3,048 x 10 -1
30
3,88 x 10 1
1,78 x 10 2 3,473 x 10 -1 3,173 x 10 -1
1,698
3,593 x 10 -1 1,208 x 10 -1 7,043 x 10 -1 3,613 x 10 -1
35 2,955 x 10 1 1,647 x 10 2 3,948 x 10 -1 2,528 x 10 -1
1,807
4,648 x 10 -1 8,878 x 10 -2 6,988 x 10 -1 4,245 x 10 -1
40
1,297 x 10 -1 1,78 x 10 -1 2,189 x 10 -1
45
1,095 x 10 -1 1,741 x 10 -1 2,269 x 10 -1
50
8,801
2,728 x 10 1 2,957 x 10 -1 9,032 x 10 -2 1,712 x 10 -1 2,324 x 10 -1 3,883 x 10 -2 8,73 x 10 -2 5,105 x 10 -1
55
7,839
2,592 x 10 1 3,499 x 10 -1 7,422 x 10 -2 1,697 x 10 -1 2,454 x 10 -1 3,419 x 10 -2 8,315 x 10 -2 5,606 x 10 -1
60
6,951
2,489 x 10 1 4,198 x 10 -1 6,251 x 10 -2 1,692 x 10 -1 2,733 x 10 -1 2,985 x 10 -2 7,961 x 10 -2 6,169 x 10 -1
65
6,13
2,409 x 10 1 5,019 x 10 -1 5,528 x 10 -2 1,696 x 10 -1 3,217 x 10 -1 2,609 x 10 -2 7,597 x 10 -2 6,756 x 10 -1
70
5,369
2,349 x 10 1 5,881 x 10 -1 5,087 x 10 -2 1,696 x 10 -1 3,847 x 10 -1 2,302 x 10 -2 7,163 x 10 -2 7,299 x 10 -1
75
4,666
2,269 x 10 1 6,618 x 10 -1 4,797 x 10 -2 1,663 x 10 -1 4,492 x 10 -1 2,066 x 10 -2 6,649 x 10 -2 7,75 x 10 -1
80
4,04
2,169 x 10 1 7,187 x 10 -1 4,583 x 10 -2 1,549 x 10 -1 4,926 x 10 -1 1,886 x 10 -2 6,093 x 10 -2 8,103 x 10 -1
85
3,504
2,037 x 10 1 7,55 x 10 -1 4,398 x 10 -2 1,348 x 10 -1 4,943 x 10 -1 1,746 x 10 -2 5,558 x 10 -2 8,392 x 10 -1
90
3,067
1,883 x 10 1 7,726 x 10 -1 4,228 x 10 -2 1,137 x 10 -1 4,69 x 10 -1 1,633 x 10 -2 5,039 x 10 -2 8,585 x 10 -1
95
2,731
1,707 x 10 1 7,714 x 10 -1 4,068 x 10 -2 9,705 x 10 -2 4,406 x 10 -1 1,543 x 10 -2 4,571 x 10 -2 8,763 x 10 -1
100
2,5
1,528 x 10 1 7,557 x 10 -1 3,925 x 10 -2 8,567 x 10 -2 4,273 x 10 -1 1,466 x 10 -2 4,171 x 10 -2 8,939 x 10 -1
105
2,364
1,341 x 10 1 7,239 x 10 -1 3,808 x 10 -2 7,862 x 10 -2 4,394 x 10 -1 1,397 x 10 -2 3,815 x 10 -2 9,08 x 10 -1
110
2,296
1,17 x 10 1 6,827 x 10 -1 3,715 x 10 -2 7,436 x 10 -2 4,752 x 10 -1 1,336 x 10 -2 3,521 x 10 -2 9,244 x 10 -1
115
2,265
1,021 x 10 1 6,363 x 10 -1 3,636 x 10 -2 7,201 x 10 -2 5,319 x 10 -1 1,283 x 10 -2 3,271 x 10 -2 9,423 x 10 -1
120
2,246
8,95
5,873 x 10 -1 3,566 x 10 -2 7,109 x 10 -2 6,073 x 10 -1 1,235 x 10 -2 3,047 x 10 -2 9,566 x 10 -1
125
2,219
7,923
5,386 x 10 -1 3,502 x 10 -2 7,113 x 10 -2 6,974 x 10 -1 1,192 x 10 -2 2,863 x 10 -2 9,684 x 10 -1
130
2,17
7,094
4,909 x 10 -1 3,445 x 10 -2 7,16 x 10 -2 7,969 x 10 -1 1,155 x 10 -2 2,702 x 10 -2 9,802 x 10 -1
135
2,102
6,45
4,469 x 10 -1 3,394 x 10 -2 7,263 x 10 -2 9,099 x 10 -1 1,122 x 10 -2 2,561 x 10 -2 9,901 x 10 -1
140
2,009
5,916
4,018 x 10 -1 3,345 x 10 -2 7,476 x 10 -2
1,047
1,088 x 10 -2 2,436 x 10 -2 9,964 x 10 -1
145
1,895
5,498
3,58 x 10 -1 3,296 x 10 -2 7,875 x 10 -2
1,224
1,056 x 10 -2 2,313 x 10 -2 9,987 x 10 -1
150
1,757
5,177
3,156 x 10 -1 3,243 x 10 -2 8,599 x 10 -2
1,467
1,03 x 10 -2 2,198 x 10 -2
1,013
kVp
Acier
Verre
Bois
α (mm –1 )
β (mm –1 )
γ
α (mm –1 )
β (mm –1 )
γ
α (mm –1 )
β (mm –1 )
γ
25
9,364
4,125 x 10 1 3,202 x 10 -1 3,804 x 10 -1
1,543
2,869 x 10 -1 2,23 x 10 -2
4,34 x 10 -2 1,937 x 10 -1
30
7,406
4,193 x 10 1 3,959 x 10 -1 3,061 x 10 -1
1,599
3,693 x 10 -1 2,166 x 10 -2 3,966 x 10 -2 2,843 x 10 -1
35
5,716
4,341 x 10 1 4,857 x 10 -1 2,396 x 10 -1
1,694
4,683 x 10 -1 1,901 x 10 -2 3,873 x 10 -2 3,732 x 10 -1
50
1,817
4,84
4,021 x 10 -1 9,721 x 10 -2 1,799 x 10 -1 4,912 x 10 -1 1,076 x 10 -2 1,862 x 10 -3
1,17
55
1,493
4,515
4,293 x 10 -1 8,552 x 10 -2 1,661 x 10 -1 5,112 x 10 -1 1,012 x 10 -2 1,404 x 10 -3
1,269
60
1,183
4,219
4,571 x 10 -1 7,452 x 10 -2 1,539 x 10 -1 5,304 x 10 -1 9,512 x 10 -3 9,672 x 10 -4
1,333
65 9,172 x 10 -1
3,982
4,922 x 10 -1 6,514 x 10 -2 1,443 x 10 -1 5,582 x 10 -1 8,99 x 10 -3
6,47 x 10 -4
1,353
70 7,149 x 10 -1
3,798
5,378 x 10 -1 5,791 x 10 -2 1,357 x 10 -1 5,967 x 10 -1 8,55 x 10 -3
5,39 x 10 -4
1,194
75 5,793 x 10 -1
3,629
5,908 x 10 -1 5,291 x 10 -2 1,28 x 10 -1 6,478 x 10 -1 8,203 x 10 -3 6,421 x 10 -4
1,062
80 4,921 x 10 -1
3,428
6,427 x 10 -1 4,955 x 10 -2 1,208 x 10 -1 7,097 x 10 -1 7,903 x 10 -3 8,64 x 10 -4 9,703 x 10 -1
85 4,355 x 10 -1
3,178
6,861 x 10 -1 4,721 x 10 -2 1,14 x 10 -1 7,786 x 10 -1 7,686 x 10 -3 1,056 x 10 -3
1,015
90 3,971 x 10 -1
2,913
7,204 x 10 -1 4,55 x 10 -2 1,077 x 10 -1 8,522 x 10 -1 7,511 x 10 -3 1,159 x 10 -3
1,081
95 3,681 x 10 -1
2,654
7,461 x 10 -1 4,41 x 10 -2 1,013 x 10 -1 9,222 x 10 -1 7,345 x 10 -3 1,133 x 10 -3
1,116
100 3,415 x 10 -1
2,42
7,645 x 10 -1 4,278 x 10 -2 9,466 x 10 -2 9,791 x 10 -1 7,23 x 10 -3 9,343 x 10 -4
1,309
105 3,135 x 10 -1
2,227
7,788 x 10 -1 4,143 x 10 -2 8,751 x 10 -2
1,014
7,05 x 10 -3 6,199 x 10 -4
1,365
110 2,849 x 10 -1
2,061
7,897 x 10 -1 4,008 x 10 -2 8,047 x 10 -2
1,03
6,921 x 10 -3 1,976 x 10 -4
3,309
115 2,579 x 10 -1
1,922
8,008 x 10 -1 3,878 x 10 -2 7,394 x 10 -2
1,033
6,864 x 10 -3 –3,908 x 10 -4 6,469 x 10 -1
120 2,336 x 10 -1
1,797
8,116 x 10 -1 3,758 x 10 -2 6,808 x 10 -2
1,031
6,726 x 10 -3 –8,308 x 10 -4
1,006
125 2,13 x 10 -1
1,677
8,217 x 10 -1 3,652 x 10 -2 6,304 x 10 -2
1,031
6,584 x 10 -3 –1,214 x 10 -3
1,192
130 1,969 x 10 -1
1,557
8,309 x 10 -1 3,561 x 10 -2 5,874 x 10 -2
1,037
6,472 x 10 -3 –1,539 x 10 -3
1,285
135 1,838 x 10 -1
1,44
8,391 x 10 -1 3,481 x 10 -2 5,519 x 10 -2
1,049
6,306 x 10 -3 –1,731 x 10 -3
1,465
140 1,724 x 10 -1
1,328
8,458 x 10 -1 3,407 x 10 -2 5,145 x 10 -2
1,057
6,191 x 10 -3 –1,849 x 10 -3
1,53
145 1,616 x 10 -1
1,225
8,519 x 10 -1 3,336 x 10 -2 4,795 x 10 -2
1,063
6,115 x 10 -3 –1,869 x 10 -3
1,498
150 1,501 x 10 -1
1,132
8,566 x 10 -1 3,266 x 10 -2 4,491 x 10 -2
1,073
6,02 x 10 -3 –1,752 x 10 -3
1,483
Tableau 5.5 – Valeurs de paramètres à utiliser dans les équations (5.18) et (5.19).
Nota : entre 25 et 35 kVp anode de molybdène, toutes les autres données pour anode
en tungstène (d’après [30], avec l’autorisation du National Council on Radiation
Protection and Measurements, http://NCRPpublications.org).
333
kVp
Plomb
Béton
Plâtre
α (mm –1 )
β (mm –1 )
γ
α (mm –1 )
β (mm –1 )
γ
α (mm –1 )
β (mm –1 )
γ
25 4,952 x 10 1 1,94 x 10 2 3,037 x 10 -1 3,904 x 10 -1
1,645
2,757 x 10 -1 1,576 x 10 -1 7,175 x 10 -1 3,048 x 10 -1
30
3,88 x 10 1
1,78 x 10 2 3,473 x 10 -1 3,173 x 10 -1
1,698
3,593 x 10 -1 1,208 x 10 -1 7,043 x 10 -1 3,613 x 10 -1
35 2,955 x 10 1 1,647 x 10 2 3,948 x 10 -1 2,528 x 10 -1
1,807
4,648 x 10 -1 8,878 x 10 -2 6,988 x 10 -1 4,245 x 10 -1
40
1,297 x 10 -1 1,78 x 10 -1 2,189 x 10 -1
45
1,095 x 10 -1 1,741 x 10 -1 2,269 x 10 -1
50
8,801
2,728 x 10 1 2,957 x 10 -1 9,032 x 10 -2 1,712 x 10 -1 2,324 x 10 -1 3,883 x 10 -2 8,73 x 10 -2 5,105 x 10 -1
55
7,839
2,592 x 10 1 3,499 x 10 -1 7,422 x 10 -2 1,697 x 10 -1 2,454 x 10 -1 3,419 x 10 -2 8,315 x 10 -2 5,606 x 10 -1
60
6,951
2,489 x 10 1 4,198 x 10 -1 6,251 x 10 -2 1,692 x 10 -1 2,733 x 10 -1 2,985 x 10 -2 7,961 x 10 -2 6,169 x 10 -1
65
6,13
2,409 x 10 1 5,019 x 10 -1 5,528 x 10 -2 1,696 x 10 -1 3,217 x 10 -1 2,609 x 10 -2 7,597 x 10 -2 6,756 x 10 -1
70
5,369
2,349 x 10 1 5,881 x 10 -1 5,087 x 10 -2 1,696 x 10 -1 3,847 x 10 -1 2,302 x 10 -2 7,163 x 10 -2 7,299 x 10 -1
75
4,666
2,269 x 10 1 6,618 x 10 -1 4,797 x 10 -2 1,663 x 10 -1 4,492 x 10 -1 2,066 x 10 -2 6,649 x 10 -2 7,75 x 10 -1
80
4,04
2,169 x 10 1 7,187 x 10 -1 4,583 x 10 -2 1,549 x 10 -1 4,926 x 10 -1 1,886 x 10 -2 6,093 x 10 -2 8,103 x 10 -1
85
3,504
2,037 x 10 1 7,55 x 10 -1 4,398 x 10 -2 1,348 x 10 -1 4,943 x 10 -1 1,746 x 10 -2 5,558 x 10 -2 8,392 x 10 -1
90
3,067
1,883 x 10 1 7,726 x 10 -1 4,228 x 10 -2 1,137 x 10 -1 4,69 x 10 -1 1,633 x 10 -2 5,039 x 10 -2 8,585 x 10 -1
95
2,731
1,707 x 10 1 7,714 x 10 -1 4,068 x 10 -2 9,705 x 10 -2 4,406 x 10 -1 1,543 x 10 -2 4,571 x 10 -2 8,763 x 10 -1
100
2,5
1,528 x 10 1 7,557 x 10 -1 3,925 x 10 -2 8,567 x 10 -2 4,273 x 10 -1 1,466 x 10 -2 4,171 x 10 -2 8,939 x 10 -1
105
2,364
1,341 x 10 1 7,239 x 10 -1 3,808 x 10 -2 7,862 x 10 -2 4,394 x 10 -1 1,397 x 10 -2 3,815 x 10 -2 9,08 x 10 -1
110
2,296
1,17 x 10 1 6,827 x 10 -1 3,715 x 10 -2 7,436 x 10 -2 4,752 x 10 -1 1,336 x 10 -2 3,521 x 10 -2 9,244 x 10 -1
115
2,265
1,021 x 10 1 6,363 x 10 -1 3,636 x 10 -2 7,201 x 10 -2 5,319 x 10 -1 1,283 x 10 -2 3,271 x 10 -2 9,423 x 10 -1
120
2,246
8,95
5,873 x 10 -1 3,566 x 10 -2 7,109 x 10 -2 6,073 x 10 -1 1,235 x 10 -2 3,047 x 10 -2 9,566 x 10 -1
125
2,219
7,923
5,386 x 10 -1 3,502 x 10 -2 7,113 x 10 -2 6,974 x 10 -1 1,192 x 10 -2 2,863 x 10 -2 9,684 x 10 -1
130
2,17
7,094
4,909 x 10 -1 3,445 x 10 -2 7,16 x 10 -2 7,969 x 10 -1 1,155 x 10 -2 2,702 x 10 -2 9,802 x 10 -1
135
2,102
6,45
4,469 x 10 -1 3,394 x 10 -2 7,263 x 10 -2 9,099 x 10 -1 1,122 x 10 -2 2,561 x 10 -2 9,901 x 10 -1
140
2,009
5,916
4,018 x 10 -1 3,345 x 10 -2 7,476 x 10 -2
1,047
1,088 x 10 -2 2,436 x 10 -2 9,964 x 10 -1
145
1,895
5,498
3,58 x 10 -1 3,296 x 10 -2 7,875 x 10 -2
1,224
1,056 x 10 -2 2,313 x 10 -2 9,987 x 10 -1
150
1,757
5,177
3,156 x 10 -1 3,243 x 10 -2 8,599 x 10 -2
1,467
1,03 x 10 -2 2,198 x 10 -2
1,013
kVp
Acier
Verre
Bois
α (mm –1 )
β (mm –1 )
γ
α (mm –1 )
β (mm –1 )
γ
α (mm –1 )
β (mm –1 )
γ
25
9,364
4,125 x 10 1 3,202 x 10 -1 3,804 x 10 -1
1,543
2,869 x 10 -1 2,23 x 10 -2
4,34 x 10 -2 1,937 x 10 -1
30
7,406
4,193 x 10 1 3,959 x 10 -1 3,061 x 10 -1
1,599
3,693 x 10 -1 2,166 x 10 -2 3,966 x 10 -2 2,843 x 10 -1
35
5,716
4,341 x 10 1 4,857 x 10 -1 2,396 x 10 -1
1,694
4,683 x 10 -1 1,901 x 10 -2 3,873 x 10 -2 3,732 x 10 -1
50
1,817
4,84
4,021 x 10 -1 9,721 x 10 -2 1,799 x 10 -1 4,912 x 10 -1 1,076 x 10 -2 1,862 x 10 -3
1,17
55
1,493
4,515
4,293 x 10 -1 8,552 x 10 -2 1,661 x 10 -1 5,112 x 10 -1 1,012 x 10 -2 1,404 x 10 -3
1,269
60
1,183
4,219
4,571 x 10 -1 7,452 x 10 -2 1,539 x 10 -1 5,304 x 10 -1 9,512 x 10 -3 9,672 x 10 -4
1,333
65 9,172 x 10 -1
3,982
4,922 x 10 -1 6,514 x 10 -2 1,443 x 10 -1 5,582 x 10 -1 8,99 x 10 -3
6,47 x 10 -4
1,353
70 7,149 x 10 -1
3,798
5,378 x 10 -1 5,791 x 10 -2 1,357 x 10 -1 5,967 x 10 -1 8,55 x 10 -3
5,39 x 10 -4
1,194
75 5,793 x 10 -1
3,629
5,908 x 10 -1 5,291 x 10 -2 1,28 x 10 -1 6,478 x 10 -1 8,203 x 10 -3 6,421 x 10 -4
1,062
80 4,921 x 10 -1
3,428
6,427 x 10 -1 4,955 x 10 -2 1,208 x 10 -1 7,097 x 10 -1 7,903 x 10 -3 8,64 x 10 -4 9,703 x 10 -1
85 4,355 x 10 -1
3,178
6,861 x 10 -1 4,721 x 10 -2 1,14 x 10 -1 7,786 x 10 -1 7,686 x 10 -3 1,056 x 10 -3
1,015
90 3,971 x 10 -1
2,913
7,204 x 10 -1 4,55 x 10 -2 1,077 x 10 -1 8,522 x 10 -1 7,511 x 10 -3 1,159 x 10 -3
1,081
95 3,681 x 10 -1
2,654
7,461 x 10 -1 4,41 x 10 -2 1,013 x 10 -1 9,222 x 10 -1 7,345 x 10 -3 1,133 x 10 -3
1,116
100 3,415 x 10 -1
2,42
7,645 x 10 -1 4,278 x 10 -2 9,466 x 10 -2 9,791 x 10 -1 7,23 x 10 -3 9,343 x 10 -4
1,309
105 3,135 x 10 -1
2,227
7,788 x 10 -1 4,143 x 10 -2 8,751 x 10 -2
1,014
7,05 x 10 -3 6,199 x 10 -4
1,365
110 2,849 x 10 -1
2,061
7,897 x 10 -1 4,008 x 10 -2 8,047 x 10 -2
1,03
6,921 x 10 -3 1,976 x 10 -4
3,309
115 2,579 x 10 -1
1,922
8,008 x 10 -1 3,878 x 10 -2 7,394 x 10 -2
1,033
6,864 x 10 -3 –3,908 x 10 -4 6,469 x 10 -1
120 2,336 x 10 -1
1,797
8,116 x 10 -1 3,758 x 10 -2 6,808 x 10 -2
1,031
6,726 x 10 -3 –8,308 x 10 -4
1,006
125 2,13 x 10 -1
1,677
8,217 x 10 -1 3,652 x 10 -2 6,304 x 10 -2
1,031
6,584 x 10 -3 –1,214 x 10 -3
1,192
130 1,969 x 10 -1
1,557
8,309 x 10 -1 3,561 x 10 -2 5,874 x 10 -2
1,037
6,472 x 10 -3 –1,539 x 10 -3
1,285
135 1,838 x 10 -1
1,44
8,391 x 10 -1 3,481 x 10 -2 5,519 x 10 -2
1,049
6,306 x 10 -3 –1,731 x 10 -3
1,465
140 1,724 x 10 -1
1,328
8,458 x 10 -1 3,407 x 10 -2 5,145 x 10 -2
1,057
6,191 x 10 -3 –1,849 x 10 -3
1,53
145 1,616 x 10 -1
1,225
8,519 x 10 -1 3,336 x 10 -2 4,795 x 10 -2
1,063
6,115 x 10 -3 –1,869 x 10 -3
1,498
150 1,501 x 10 -1
1,132
8,566 x 10 -1 3,266 x 10 -2 4,491 x 10 -2
1,073
6,02 x 10 -3 –1,752 x 10 -3
1,483
Tableau 5.5 – Valeurs de paramètres à utiliser dans les équations (5.18) et (5.19).
Nota : entre 25 et 35 kVp anode de molybdène, toutes les autres données pour anode
en tungstène (d’après [30], avec l’autorisation du National Council on Radiation
Protection and Measurements, http://NCRPpublications.org).