The aim of this study is to determine, via measurements on phantoms and Monte Carlo (MC) simulations, the dose distribution of absorbed dose in a cone-beam breast computed tomography scan. The absorbed dose volume distribution was measured inside a polyethylene cylindrical phantom, simulating adipose breast tissue, using LiF:Mg, Ti thermoluminescence dosimeters. A reasonable agreement (between 2 and 8%) between the simulated and measured data was observed. The 3D distribution of absorbed dose was evaluated at 40, 60 and 80 kV in a phantom simulating a pendant breast. MC simulations indicate a significantly lower spread of volume dose than in mammography. The dose variation along the radial distance in the simulated phantoms was in the range of 4-14%. These findings might be useful when devising models for breast imaging dose assessment that take into account the uneven distribution of the glandular mass in the breast volume.

Mettivier, G., Costa, ., Lanconelli, N., Ianiro, A., Pugliese, M., Quarto, M., et al. (2017). Evaluation of dose homogeneity in cone-beam breast computed tomography. RADIATION PROTECTION DOSIMETRY, 175(4), 473-481 [10.1093/rpd/ncw375].

Evaluation of dose homogeneity in cone-beam breast computed tomography

LANCONELLI, NICO;
2017

Abstract

The aim of this study is to determine, via measurements on phantoms and Monte Carlo (MC) simulations, the dose distribution of absorbed dose in a cone-beam breast computed tomography scan. The absorbed dose volume distribution was measured inside a polyethylene cylindrical phantom, simulating adipose breast tissue, using LiF:Mg, Ti thermoluminescence dosimeters. A reasonable agreement (between 2 and 8%) between the simulated and measured data was observed. The 3D distribution of absorbed dose was evaluated at 40, 60 and 80 kV in a phantom simulating a pendant breast. MC simulations indicate a significantly lower spread of volume dose than in mammography. The dose variation along the radial distance in the simulated phantoms was in the range of 4-14%. These findings might be useful when devising models for breast imaging dose assessment that take into account the uneven distribution of the glandular mass in the breast volume.
2017
Mettivier, G., Costa, ., Lanconelli, N., Ianiro, A., Pugliese, M., Quarto, M., et al. (2017). Evaluation of dose homogeneity in cone-beam breast computed tomography. RADIATION PROTECTION DOSIMETRY, 175(4), 473-481 [10.1093/rpd/ncw375].
Mettivier, G; Costa, ; Lanconelli, Nico; Ianiro, A; Pugliese, M; Quarto, M; Russo, P.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/610105
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