Table B.25: Red bone marrow in the whole body - Helmholtz ...
Table B.25: Red bone marrow in the whole body - Helmholtz ...
Table B.25: Red bone marrow in the whole body - Helmholtz ...
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30<br />
<strong>Table</strong> B. 3: Bra<strong>in</strong><br />
Mean organ dose normalised to air kerma free <strong>in</strong> air on <strong>the</strong> axis of rotation<br />
and average coefficients of variance per s<strong>in</strong>gle 1 cm wide slice; <strong>the</strong> volume<br />
ratio of <strong>the</strong> organ located with<strong>in</strong> each s<strong>in</strong>gle slice is also shown.<br />
Slice Volume Conversion factors Coeff.<br />
ratio<br />
of var.<br />
80 kV 125 kV<br />
cm % 360° 180° 360° 180° %<br />
0 to 1 2.4 .0276 .0287 .0314 .0322 0.34<br />
1 to 2 8.1 .0685 .0711 .0795 .0813 0.23<br />
2 to 3 13.7 .1015 .1028 .1178 .1195 0.19<br />
3 to 4 16.9 .1190 .1204 .1396 .1412 0.17<br />
4 to 5 18.1 .1243 .1249 .1462 .1467 0.17<br />
5 to 6 17.1 .1155 .1149 .1361 .1361 0.17<br />
6 to 7 12.4 .0886 .0838 .1051 .1009 0.20<br />
7 to 8 7.5 .0593 .0550 .0709 .0667 0.24<br />
8 to 9 3.3 .0319 .0289 .0398 .0369 0.31<br />
9 to 10 0.4 .0140 .0128 .0181 .0170 0.45<br />
10 to 11 .0084 .0082 .0108 .0108 0.57<br />
11 to 12 .0054 .0052 .0071 .0071 0.71<br />
12 to 13 .0038 .0038 .0051 .0052 0.84<br />
13 to 14 .0027 .0027 .0037 .0037 0.99<br />
14 to 15 .0021 .0022 .0030 .0030 1.09<br />
15 to 16 .0016 .0017 .0024 .0024 1.24<br />
16 to 17 .0012 .0013 .0018 .0019 1.41<br />
17 to 18 .0009 .0010 .0014 .0015 1.62<br />
18 to 19 .0007 .0007 .0011 .0011 1.85<br />
19 to 20 .0005 .0005 .0008 .0008 2.11<br />
20 to 21 .0003 .0004 .0006 .0006 2.54<br />
21 to 22 .0003 .0003 .0005 .0005 2.88<br />
22 to 23 .0002 .0002 .0004 .0004 3.08<br />
23 to 24 .0002 .0002 .0003 .0003 3.43<br />
24 to 25 .0002 .0002 .0003 .0003 3.83<br />
25 to 26 .0001 .0001 .0002 .0002 4.33<br />
26 to 27 .0001 .0001 .0002 .0002 4.90<br />
27 to 28 .0001 .0001 .0001 .0001 5.56<br />
28 to 29 .0001 .0001 .0001 .0001 6.34<br />
29 to 30 * * .0001 .0001 7.21<br />
30 to 31 * * .0001 .0001 8.35<br />
An asterisk as table entry means that <strong>the</strong> conversion factor is less than 0.00005.