TABLE 3.
Dose to the organs, bones and skin sections per unit dose to the imaged breast (ROD) in the MLO view. Only the volumes with a ROD higher than 0.10% in at least one view and one spectrum and the uterus/fetus are included. For the cases where the ROD was found to be equivalent for left and right imaged breast, the mean value is reported, for the other cases both ROD are shown (left/right). The first half value layer of the spectra is computed under the compression plate. Note that the ROD values for the uterus/fetus are not percentages.
| Volume | 25 kVp 0.322 mm Al | Mo/Mo 30 kVp 0.378 mm Al | 35 kVp 0.417 mm Al | 25 kVp 0.371 mm Al | Mo/Rh 30 kVp 0.431 mm Al | 35 kVp 0.465 mm Al | 25 kVp 0.353 mm Al | Rh/Rh 30 kVp 0.442 mm Al | 35 kVp 0.508 mm Al | |
|---|---|---|---|---|---|---|---|---|---|---|
| Organs | Breast (CL) | 0.51% | 0.55% | 0.57% | 0.54% | 0.56% | 0.59% | 0.55% | 0.59% | 0.62% |
| Eye (IL) | 0.07% | 0.08% | 0.08% | 0.08% | 0.08% | 0.09% | 0.08% | 0.09% | 0.10% | |
| Eye Lens (IL) | 0.10% | 0.11% | 0.12% | 0.12% | 0.13% | 0.14% | 0.12% | 0.14% | 0.16% | |
| Heart | 0.02%/0.01% | 0.03%/0.01% | 0.06%/0.03% | 0.03%/0.01% | 0.04%/0.02% | 0.06%/0.03% | 0.03%/0.01% | 0.05%/0.02% | 0.08%/0.03% | |
| Lung (IL) | 0.02% | 0.04% | 0.08%/0.09% | 0.03%/0.04% | 0.05%/0.06% | 0.08%/0.10% | 0.04%/0.05% | 0.07%/0.08% | 0.10%/0.12% | |
| Pectoralis Muscle1 | 16.44% | 18.55% | 20.33% | 18.94% | 20.73% | 21.91% | 19.67% | 22.95% | 24.76% | |
| Thymus | 0.01% | 0.02% | 0.06% | 0.02% | 0.03% | 0.06% | 0.03% | 0.04% | 0.07% | |
| Uterus or Fetus2 | <10−6 | <10−6 | <10−5 | <10−6 | <10−6 | <10−5 | <10−6 | <10−5 | <10−5 | |
| Bone Marrow | Clavicle (IL) | 0.01% | 0.02% | 0.04% | 0.02% | 0.03% | 0.04% | 0.02% | 0.04% | 0.05% |
| Rib Cage | 0.11% | 0.13% | 0.16% | 0.13% | 0.15% | 0.17% | 0.14% | 0.17% | 0.20% | |
| Sternum | 0.16% | 0.18% | 0.22% | 0.18% | 0.20% | 0.23% | 0.19% | 0.23% | 0.27% | |
| Bone Surface | Arm Bone (middle section, IL) | 0.00% | 0.00% | 0.01% | 0.00% | 0.00% | 0.01% | 0.00% | 0.00% | 0.01% |
| Arm Bone (upper section, IL) | 0.00% | 0.01% | 0.04% | 0.01% | 0.02% | 0.04% | 0.01% | 0.02% | 0.04% | |
| Clavicle (IL) | 0.06% | 0.10% | 0.18% | 0.09% | 0.12% | 0.18% | 0.10% | 0.15% | 0.22% | |
| Rib Cage | 0.44% | 0.54% | 0.68% | 0.54% | 0.62% | 0.73% | 0.58% | 0.73% | 0.84% | |
| Sternum | 0.64% | 0.75% | 0.92% | 0.74% | 0.84% | 0.97% | 0.80% | 0.96% | 1.10% | |
| Skin | Trunk | 0.75% | 0.69% | 0.67% | 0.69% | 0.65% | 0.63% | 0.71% | 0.64% | 0.60% |
| Neck | 0.10% | 0.09% | 0.08% | 0.09% | 0.08% | 0.08% | 0.09% | 0.08% | 0.07% | |
| Head | 0.14% | 0.14% | 0.13% | 0.13% | 0.13% | 0.13% | 0.14% | 0.12% | 0.12% | |
| Breast (CL) | 2.25% | 2.06% | 1.95% | 2.04% | 1.90% | 1.84% | 2.05% | 1.84% | 1.74% | |
| Breast (IL) | 170.13% | 152.27% | 141.52% | 150.96% | 137.44% | 130.75% | 150.79% | 128.99% | 118.73% |
Note: The pectoralis muscle simulated is the portion inside the imaged compressed breast.
Fetus in the first trimester. ROD = Relative Organ Dose, MLO = Medio-Lateral Oblique, CL = Contralateral, IL = Ipsilateral