| 저자(한글) |
Geeraert, N.,Klausz, R.,Muller, S.,Bloch, I.,Bosmans, H. |
| 초록 |
The imparted energy to the glandular tissue in the breast (glandular imparted energy, GIE) is proposed for an improved assessment of the individual radiation-induced risk resulting from X-ray breast imaging. GIE is computed from an estimation of the quantity and localisation of glandular tissue in the breast. After a digital breast tomosynthesis (DBT) acquisition, the volumetric glandular content (volumetric breast density, VBD) is computed from the central X-ray projection. The glandular tissue distribution is determined by labelling the DBT voxels to ensure the conservation of the VBD. Finally, the GIE is calculated by Monte Carlo #x00A0;computation on the resulting tissue-labelled DBT volume. For verification, the method was applied to 10 breast-shaped digital phantoms made of different glandular spheres in an adipose background, and to a digital anthropomorphic phantom. Results were compared to direct GIE computations on the phantoms considered as #x2018;ground-truth #x2019;. The major limitations in accuracy are those of DBT, in particular the limited #x00A0; z -resolution. However, for most phantoms, the results can be considered as acceptable. |
