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A NEW MAMMOGRAPHY DOSIMETRIC PHANTOM

机译：一种新的乳腺摄影剂量幻影

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摘要

Breast phantoms produced with tissue-equivalent materials are used in an attempt to simulate glandular and adipose tissues, in terms of X-ray attenuation and density. In this work, a set of breast tissue-equivalent phantoms (BTE phantoms) with semicircular shapes of different thicknesses and compositions were produced. Such phantoms may be used in the measurement of the incident air kerma (K_i,) and the mean glandular dose (D_G) delivered to patients undergoing mammography. To characterise the materials used to produce the phantoms, a series of 17-keV X-ray attenuation coefficient measurements were performed. The carbon-nitrogen-hydrogen elemental composition and the densities of the tissue-equivalent materials were also determined and compared with values available in the literature. Linear attenuation coefficients of 0.724 and 0.923 cm~(-1) were determined, respectively, for adipose and glandular tissues. Such values agree with data available in the literature. On the basis of the results obtained in this work, it is suggested that BTE phantoms are used instead of polymethyl methacrylate phantoms to select exposure parameters (kV, mAs and target/filter combination) specific for breast glandularities from 0 to 50 % in the optimisation of doses in mammography.
机译：用与组织相当的材料制成的乳房模型，在X射线衰减和密度方面试图模拟腺体和脂肪组织。在这项工作中，制作了一组具有不同厚度和成分的半圆形形状的等效于乳房组织的幻像（BTE幻像）。这样的体模可以用于测量入射的空气比释动能（K_i）和输送给进行乳房X线照相术的患者的平均腺体剂量（D_G）。为了表征用于产生幻影的材料，进行了一系列17-keV X射线衰减系数测量。还确定了碳-氮-氢元素组成和组织当量材料的密度，并与文献中提供的值进行了比较。脂肪组织和腺体组织的线性衰减系数分别为0.724和0.923 cm〜（-1）。这样的值与文献中可用的数据一致。根据这项工作获得的结果，建议在优化中使用BTE体模代替聚甲基丙烯酸甲酯体模来选择特定于0至50％乳腺腺体的暴露参数（kV，mAs和目标/过滤器组合）乳腺摄影中的剂量

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  • 来源
    《Radiation Protection Dosimetry》 |2012年第1期|p.196-198|共3页
  • 作者

    C. D. Almeida; C. M. C. Coutinho; B. M. Dantas; J. E. Peixoto; H. A. Koch;

  • 作者单位

    Institute de Radioprotecao e Dosimetria, CNEN, Av. Salvador Allende s, CEP 22780-160 Rio de Janeiro, Brazil;

    Institute de Radioprotecao e Dosimetria, CNEN, Av. Salvador Allende s, CEP 22780-160 Rio de Janeiro, Brazil;

    Institute de Radioprotecao e Dosimetria, CNEN, Av. Salvador Allende s, CEP 22780-160 Rio de Janeiro, Brazil;

    Instituto Nacional de Cancer, INCA, Rua do Rezende, 128/322, CEP 20231-092 Rio de Janeiro, RJ, Brazil;

    Hospital Universitario Clementino Fraga Filho, HU-UFRJ, Av. Brigadeiro Trompowsky, s, Ilha do Fundao, CEP 21945-560 Rio de Janeiro, RJ, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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