Table 5.
Normalized values of organ absorbed dose (mGy∕100 mA s) calculated from the reference ORNL 15-year phantom, and the 10th, 50th, and 90th weight percentile UF hybrid 15-year-old female phantoms for chest and abdominal CT exams. The ratios of organ doses between the ORNL and 50th percentile phantoms, 10th and 50th phantoms, and 90th and 50th phantoms are given.
| Female phantoms | DORNL (mGy∕100 mA s) | DUFH50 (mGy∕100 mA s) | DUFH50∕DORNL | DUFH10 (mGy∕100 mA s) | DUFH10∕DUFH50 | DUFH90 (mGy∕100 mA s) | DUFH90∕DUFH50 | |
|---|---|---|---|---|---|---|---|---|
| Chest CT | Esophagus | 8.05E+00 | 8.46E+00 | 1.05 | 9.33E+00 | 1.10 | 7.90E+00 | 0.93 |
| Breast | 8.08E+00 | 9.43E+00 | 1.17 | 1.09E+01 | 1.15 | 9.37E+00 | 0.99 | |
| Heart | 1.00E+01 | 1.03E+01 | 1.03 | 1.18E+01 | 1.14 | 9.82E+00 | 0.95 | |
| Kidney | 3.88E+00 | 1.18E+00 | 0.30 | 1.16E+00 | 0.98 | 1.18E+00 | 1.00 | |
| Liver | 6.77E+00 | 6.59E+00 | 0.97 | 7.14E+00 | 1.08 | 6.27E+00 | 0.95 | |
| Lungs | 1.03E+01 | 1.05E+01 | 1.01 | 1.17E+01 | 1.11 | 9.77E+00 | 0.93 | |
| Stomach wall | 5.90E+00 | 5.54E+00 | 0.94 | 5.93E+00 | 1.07 | 5.25E+00 | 0.95 | |
| Thymus | 1.12E+01 | 9.31E+00 | 0.83 | 9.92E+00 | 1.07 | 8.82E+00 | 0.95 | |
| Thyroid | 4.18E+00 | 8.72E+00 | 2.09 | 8.88E+00 | 1.02 | 8.42E+00 | 0.96 | |
| Min | 0.30 | 0.98 | 0.93 | |||||
| Max | 2.09 | 1.15 | 1.00 | |||||
| Abdomen CT | Colon and rectum | 3.80E+00 | 5.46E+00 | 1.44 | 5.73E+00 | 1.05 | 4.12E+00 | 0.75 |
| Esophagus | 2.41E+00 | 2.02E+00 | 0.84 | 2.18E+00 | 1.08 | 1.91E+00 | 0.95 | |
| Heart | 1.51E+00 | 1.68E+00 | 1.11 | 1.68E+00 | 1.00 | 1.65E+00 | 0.99 | |
| Kidney | 9.37E+00 | 9.78E+00 | 1.04 | 1.05E+01 | 1.08 | 7.00E+00 | 0.72 | |
| Liver | 8.14E+00 | 8.94E+00 | 1.10 | 9.71E+00 | 1.09 | 7.92E+00 | 0.89 | |
| Lungs | 1.46E+00 | 2.01E+00 | 1.37 | 2.04E+00 | 1.02 | 1.95E+00 | 0.97 | |
| Stomach wall | 8.82E+00 | 9.20E+00 | 1.04 | 1.00E+01 | 1.09 | 8.06E+00 | 0.88 | |
| Small intestine | 4.53E+00 | 5.85E+00 | 1.29 | 6.35E+00 | 1.09 | 4.14E+00 | 0.71 | |
| Min | 0.84 | 1.00 | 0.71 | |||||
| Max | 1.44 | 1.09 | 0.99 | |||||