Table 3. Comparison of effective dose (μSv) for several scan protocols using the i-CAT Next Generation and i-CAT Classic13,16,19,20.
Current study |
Ludlow and Ivanovic13 |
Ludlow and Ivanovic13 |
Ludlow et al16 |
Roberts et al20 |
Loubele et al19 |
||
Program | Tissue weighting factor | i-CAT Next Generation | i-CAT Next Generation | i-CAT Classic | i-CAT Classic | i-CAT Classic | i-CAT Classic |
Full head (0.4 voxel)a | ICRP 1990 | 47 | 37 | 134.4 | 92.8 | - | |
ICRP 2007 | 78 | 74 | 193.4b | 182.1 | 82 | ||
13 cm (0.4 mm voxel) | ICRP 1990 | 44 | 36 | 29 | 68.7 | 39.5 | |
ICRP 2007 | 77 | 87 | 69 | 104.5b | 110.5 | ||
6 cm mandible (0.4 mm voxel) | ICRP 1990 | 35 | 23.9 | - | |||
ICRP 2007 | 58 | 75.3 | 34 | ||||
6 cm mandible (0.2 mm voxel) | ICRP 1990 | 69 | 47.2 | - | |||
ICRP 2007 | 113 | 148.5 | 64 | ||||
6 cm maxilla (0.4 mm voxel) | ICRP 1990 | 18 | 9.7 | - | |||
ICRP 2007 | 32 | 36.5 | 45 | ||||
6 cm maxilla (0.2 mm voxel) | ICRP 1990 | 35 | 18.5 | - | |||
ICRP 2007 | 60 | 68.3 | 77 |
aHeight 17 cm for i-CAT Next Generation and 22 cm for i-CAT Classic
bBased on proposed ICRP 2005 tissue weighting factors