EVALUATION OF DOSE HOMOGENEITY IN CONE-BEAM BREAST COMPUTED TOMOGRAPHY

被引：6

作者：

Mettivier, Giovanni ^{[1
,2
]}

Costa, Matilde ^{[3
,4
]}

Lanconelli, Nico ^{[4
,5
]}

Ianiro, Anna ^{[1
]}

Pugliese, Mariagabriella ^{[1
,2
]}

Quarto, Maria ^{[1
,2
]}

Russo, Paolo ^{[1
,2
]}

机构：

[1] Univ Napoli Federico II, Dipartimento Fis Ettore Pancini, Naples, Italy

[2] Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy

[3] Univ Trieste, Dipartimento Fis, Trieste, Italy

[4] Univ Bologna, Dipartimento Fis & Astron, Alma Mater Studiorum, Bologna, Italy

[5] Ist Nazl Fis Nucl, Sez Bologna, Bologna, Italy

来源：

RADIATION PROTECTION DOSIMETRY | 2017年 / 175卷 / 04期

关键词：

X-RAY-SPECTRA; MONTE-CARLO; EXPERIMENTAL PHANTOM; CT; MAMMOGRAPHY;

D O I：

10.1093/rpd/ncw375

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页码：473 / 481

页数：9

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