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Tena phantom formats and their characteristics
| Mesh format | DICOM | Voxelized |
|---|---|---|
| N° vertices1: 2889437 N° faces1: 5777800 | Slice thickness: 0.625 mm Distance between slices: 1.867 mm Matrix: 512 x 512 Pixel dimensions: 0.82 mm | Grid size: 219 x 148 x 479 N° voxels: 1.55*10-7 Isovoxel size: 0.186 cm |
Contribution of each field to the fetal dose_ Fetus and breast doses are normalized per source particle, field contribution to the breast dose is obtained from treatment planning system (TPS), and the breast/fetus ratio is calculated from normalized breast and fetus doses
| Field | Fetus dose per source particle [Gy/SP] 10-19 | Breast dose per source particle [Gy/SP] 10-19 | Field contribution to breast dose1 | Fetus dose normalized to field contribution [Gy/SP] 10-19 | Breast dose normalized to field contribution [Gy/SP] 10-19 | Ratio fetus / breast dose [mGy/Gy] |
|---|---|---|---|---|---|---|
| F1 | 1.45 ± 0.12 | 1000 ± 90 | 0.437 | 0.634 ± 0.054 | 437 ± 37 | 1.44 |
| F2 | 1.05 ± 0.09 | 1070 ± 90 | 0.378 | 0.399 ± 0,035 | 404 ± 36 | 0.99 |
| F3 | 1.03 ± 0.08 | 993 ± 80 | 0.064 | 0.066 ± 0,005 | 63.5 ± 5 | 1.03 |
| F4 | 0.270 ± 0.02 | 1010 ± 80 | 0.057 | 0.015 ± 0.001 | 57.3 ± 4 | 0.27 |
| F5 | 0.854 ± 0.07 | 449 ± 40 | 0.064 | 0.055 ± 0,005 | 28.7 ± 2 | 1.91 |
| Total | 1.169 ± 0.064 | 992.5 ± 52 | ||||
| Total normalized | to prescribed dose | 58.9 ± 3.7 mGy | 50 Gy* |
Relative contribution to the absorbed dose in the fetus (%) originating in the linac or the phantom_ The ratio for each field of photons originating in linac or phantom is given in the last row
| F1 | F2 | F3 | F4 | F5 | Overall | |
|---|---|---|---|---|---|---|
| Linac (%) | 6.0 | 2.1 | 0.8 | 0.3 | 0.3 | 9.5 |
| Phantom (%) | 37.7 | 35.7 | 5.6 | 5.4 | 6.1 | 90.5 |
| Contribution ratio | 16.12 | 5.8 | 14.3 | 5.5 | 4.9 |
List of the tissues and organs in our developed mesh pregnant female phantom in 2nd trimester (Tena), including volume, mass (calculated as the product of tissue density according to ICRP 89 and segmented organ volume) and surface area
| Tissue/organ | Volume (cm3) | Mass (g) | Surface area (cm2) |
|---|---|---|---|
| Adrenal glands | 5.1 | 5.2 | 40.2 |
| Amniotic fluid | 423.4 | 423.4 | 381.7 |
| Blood vessels/blood | 806.4 | 854.8 | 1739.3 |
| Bones, cortex (including | |||
| proximal humerus and femoral | 2443.4 | 4691.4 | 10667.3 |
| heads) | |||
| Bone marrow (including proximal humerus and femoral | 723.4 | 724.4 | 2365.7 |
| heads) | |||
| Central nervous system (brain and spinal cord) | 1156.3 | 1214.1 | 752.4 |
| Colon, content | 454.2 | 472.4 | 825.5 |
| Colon, wall | 287.2 | 298.7 | 1914.3 |
| Esophagus, content | 4.4 | 0 | 42.0 |
| Esophagus, wall | 12.2 | 12.5 | 123.3 |
| Eyeballs | 12.4 | 13.1 | 32.9 |
| Fetus, 17 week old | 123.0 | 129.2 | 200.6 |
| Gall bladder, content | 15.5 | 15.9 | 42.3 |
| Gall bladder, wall | 15.6 | 16.1 | 104.1 |
| Kidneys | 312.3 | 327.9 | 340.4 |
| Liver | 1780.4 | 1869.5 | 1133.2 |
| Lungs | 3937.1 | 1515.8 | 2385.4 |
| Myocardium | 221.6 | 232.7 | 804.1 |
| Pancreas | 85.2 | 89.4 | 161.3 |
| Parotid glands | 24.1 | 24.9 | 64.8 |
| Placenta | 142.7 | 145.5 | 216.8 |
| Soft tissue tissues and (skin) muscles, adipose | 36080.41 | 36802.02 | 39186.9 |
| Spleen | 391.2 | 406.9 | 345.0 |
| Stomach, duodenum and small intestine, content | 570.3 | 593.1 | 1176.1 |
| Stomach, duodenum and small intestine, wall | 425.2 | 442.2 | 2717.9 |
| Submandibular glands | 5.3 | 5.5 | 22.0 |
| Thyroid gland | 10.0 | 10.4 | 3990.0 |
| Upper airways (nasal cavity, | |||
| pharynx and larynx) and | 136.9 | 0.1 | 426.7 |
| trachea/air | |||
| Urinary bladder, content | 11.1 | 11.6 | 38.6 |
| Urinary bladder, wall | 21.5 | 22.2 | 104.7 |
| Uterus (myometrium) | 552.5 | 580.1 | 917.6 |