TABLE 2.
Ratio of dose to the different tissues per unit dose to the imaged breast (ROD). The tissues that received doses below 0.10% of that of the imaged breast are not included. Where two values are included, they represent the dose ratio when the (left/right) breast, is being imaged, if only one value is shown, the doses during the imaging of either breast were equivalent. The dose ratio to the uterus, which is representative of that to the fetus during early pregnancy, is also included. The first half value layers of the x-ray spectra used are shown.
| Tissue Type | Volume | 40 kVp 2.51 mm Al | 50 kVp 3.45 mm Al | 60 kVp 4.29 mm Al | 70 kVp 5.04 mm Al | 80 kVp 5.81 mm Al |
|---|---|---|---|---|---|---|
| Organs | Adrenal (CL) | 0.01%/0.01% | 0.03%/0.03% | 0.05%/0.06% | 0.08%/0.10% | 0.11%/0.13% |
| Adrenal (IL) | 0.04%/0.06% | 0.10%/0.14% | 0.16%/0.23% | 0.23%/0.31% | 0.29%/0.39% | |
| Breast (CL) | 0.57% | 0.72% | 0.83% | 0.91% | 0.97% | |
| Colon (transverse) | 0.02% | 0.04% | 0.06% | 0.08% | 0.10% | |
| Esophagus | 0.09%/0.07% | 0.21%/0.16% | 0.34%/0.27% | 0.46%/0.37% | 0.57%/0.46% | |
| Gall Bladder | 0.03%/0.06% | 0.07%/0.13% | 0.11%/0.20% | 0.15%/0.27% | 0.19%/0.34% | |
| Heart | 1.06%/0.44% | 1.75%/0.79% | 2.32%/1.11% | 2.74%/1.37% | 3.08%/1.58% | |
| Kidney (IL) | 0.01% | 0.03% | 0.06% | 0.09% | 0.12% | |
| Liver | 0.05%/0.23% | 0.10%/0.44% | 0.15%/0.63% | 0.20%/0.79% | 0.24%/0.92% | |
| Lung (CL) | 0.05%/0.04% | 0.11%/0.09% | 0.19%/0.16% | 0.26%/0.22% | 0.32%/0.28% | |
| Lung (IL) | 1.14%/1.32% | 1.79%/2.03% | 2.29%/2.57% | 2.65%/2.95% | 2.93%/3.25% | |
| Pancreas | 0.07%/0.03% | 0.18%/0.08% | 0.29%/0.13% | 0.40%/0.19% | 0.50%/0.25% | |
| Spleen | 0.07%/0.00% | 0.16%/0.02% | 0.27%/0.03% | 0.36%/0.05% | 0.44%/0.07% | |
| Stomach | 0.26%/0.03% | 0.47%/0.07% | 0.66%/0.11% | 0.82%/0.14% | 0.95%/0.18% | |
| Thymus | 0.73% | 1.27% | 1.72% | 2.07% | 2.35% | |
| Thyroid | 0.04% | 0.08% | 0.12% | 0.15% | 0.19% | |
| Uterus/Fetus1 | 0.005% | 0.010% | 0.015% | 0.021% | 0.026% | |
| Bone Marrow | Arm Bone (middle section, IL) | 0.11% | 0.22% | 0.33% | 0.43% | 0.52% |
| Arm Bone (upper section, IL) | 0.10% | 0.20% | 0.29% | 0.38% | 0.46% | |
| Clavicle (CL) | 0.03% | 0.06% | 0.09% | 0.12% | 0.15% | |
| Clavicle (IL) | 0.22% | 0.40% | 0.56% | 0.69% | 0.81% | |
| Rib Cage | 0.74% | 1.04% | 1.28% | 1.45% | 1.59% | |
| Scapulae (IL) | 0.02% | 0.05% | 0.08% | 0.12% | 0.15% | |
| Spine (trunk section) | 0.01%/0.01% | 0.03%/0.03% | 0.06%/0.07% | 0.09%/0.10% | 0.12%/0.14% | |
| Sternum | 0.85% | 1.30% | 1.69% | 1.99% | 2.24% | |
| Bone Surface | Arm Bone (lower section, IL) | 0.06% | 0.10% | 0.14% | 0.17% | 0.20% |
| Arm Bone (middle section, IL) | 0.47% | 0.87% | 1.22% | 1.50% | 1.72% | |
| Arm Bone (upper section, IL) | 0.43% | 0.77% | 1.07% | 1.30% | 1.49% | |
| Clavicle (CL) | 0.14% | 0.24% | 0.34% | 0.42% | 0.50% | |
| Clavicle (IL) | 0.92% | 1.57% | 2.11% | 2.50% | 2.80% | |
| Cranium | 0.04% | 0.07% | 0.09% | 0.10% | 0.11% | |
| Facial Skeleton | 0.05% | 0.07% | 0.10% | 0.12% | 0.13% | |
| Rib Cage | 3.06% | 4.14% | 4.86% | 5.30% | 5.56% | |
| Scapulae (IL) | 0.08% | 0.20% | 0.32% | 0.43% | 0.52% | |
| Spine (head section) | 0.02% | 0.04% | 0.07% | 0.10% | 0.13% | |
| Spine (neck section) | 0.03% | 0.07% | 0.12% | 0.18% | 0.23% | |
| Spine (trunk section) | 0.04%/0.05% | 0.11%/0.14% | 0.21%/0.25% | 0.31%/0.37% | 0.41%/0.48% | |
| Sternum | 3.52% | 5.16% | 6.37% | 7.18% | 7.74% | |
| Skin | Breast (CL) | 0.95% | 1.08% | 1.17% | 1.23% | 1.27% |
| Breast (IL) | 128.93% | 118.82% | 114.00% | 111.35% | 109.63% | |
| Head | 0.09% | 0.09% | 0.10% | 0.11% | 0.11% | |
| Neck | 0.05% | 0.07% | 0.10% | 0.12% | 0.14% | |
| Trunk | 0.50% | 0.57% | 0.61% | 0.65% | 0.67% |
1
Note: Fetus in the first trimester. CL = Contralateral, IL = Ipsilateral