INDIVIDUALISED CALCULATION OF TISSUE IMPARTED ENERGY IN BREAST TOMOSYNTHESIS

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 t...

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Bibliographic Details
Published in:Radiation protection dosimetry 2016-06, Vol.169 (1-4), p.267-273
Main Authors: Geeraert, N, Klausz, R, Muller, S, Bloch, I, Bosmans, H
Format: Article
Language:English
Subjects:
Adipose Tissue - pathology
Algorithms
Anthropometry
Breast - diagnostic imaging
Calibration
Computer Simulation
Female
Humans
Image Processing, Computer-Assisted
Imaging, Three-Dimensional
Mammography - methods
Monte Carlo Method
Radiation Dosage
Radiographic Image Enhancement - methods
Radiographic Image Interpretation, Computer-Assisted
Radiometry - methods
Reproducibility of Results
X-Rays
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Summary: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 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 'ground-truth'. The major limitations in accuracy are those of DBT, in particular the limited z-resolution. However, for most phantoms, the results can be considered as acceptable.
ISSN:0144-8420
1742-3406
DOI:10.1093/rpd/ncw106