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Table B.25: Red bone marrow in the whole body - Helmholtz ...

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137<br />

<strong>Table</strong> D.24: <strong>Red</strong> <strong>bone</strong> <strong>marrow</strong> <strong>in</strong> <strong>the</strong> lumbar sp<strong>in</strong>e<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 />

15 to 16 * * * .0001 17.09<br />

16 to 17 * * .0001 * 15.15<br />

17 to 18 * * .0001 .0001 15.22<br />

18 to 19 * * .0001 .0001 14.56<br />

19 to 20 * * .0001 .0001 12.19<br />

20 to 21 * .0001 .0001 .0001 10.97<br />

21 to 22 .0001 .0001 .0001 .0002 6.74<br />

22 to 23 .0001 .0001 .0002 .0002 8.16<br />

23 to 24 .0001 .0001 .0003 .0003 7.53<br />

24 to 25 .0002 .0002 .0004 .0004 6.54<br />

25 to 26 .0002 .0002 .0004 .0005 5.89<br />

26 to 27 .0002 .0003 .0006 .0005 5.23<br />

27 to 28 .0003 .0003 .0006 .0007 4.73<br />

28 to 29 .0004 .0004 .0008 .0009 4.30<br />

29 to 30 .0005 .0005 .0010 .0010 3.81<br />

30 to 31 .0006 .0007 .0012 .0013 3.48<br />

31 to 32 .0008 .0008 .0015 .0015 3.17<br />

32 to 33 .0010 .0011 .0020 .0021 2.74<br />

33 to 34 .0014 .0015 .0026 .0027 2.43<br />

34 to 35 .0019 .0019 .0034 .0035 2.11<br />

35 to 36 .0025 .0025 .0044 .0044 1.87<br />

36 to 37 .0033 .0032 .0058 .0055 1.65<br />

37 to 38 .0044 .0041 .0073 .0069 1.48<br />

38 to 39 .0060 .0052 .0100 .0086 1.31<br />

39 to 40 .0086 .0070 .0136 .0114 1.14<br />

40 to 41 7.9 .0217 .0133 .0322 .0207 0.86<br />

41 to 42 8.3 .0249 .0159 .0366 .0250 0.80<br />

42 to 43 8.1 .0265 .0172 .0388 .0265 0.77<br />

43 to 44 7.8 .0277 .0194 .0401 .0299 0.75<br />

44 to 45 10.0 .0316 .0215 .0458 .0328 0.70<br />

45 to 46 7.2 .0277 .0211 .0411 .0320 0.72<br />

46 to 47 9.1 .0305 .0230 .0449 .0353 0.69<br />

47 to 48 8.1 .0292 .0233 .0435 .0348 0.70<br />

48 to 49 9.9 .0309 .0236 .0459 .0356 0.69

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