Flores Mabel B, Mourão Arnaldo P, Oliveira Fernando A, Del Río Margarita C
Departamento de Engenharia Nuclear, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
Departamento de Engenharia Nuclear, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Centro de Engenharia Biomédica, Centro Federal de Educação Tecnológica de Minas Gerais, Belo Horizonte, MG, Brazil.
Appl Radiat Isot. 2019 Oct;152:140-144. doi: 10.1016/j.apradiso.2019.07.002. Epub 2019 Jul 2.
Digital Breast Tomosynthesis (DBT) is an efficient method to diagnose changes in the breast tissues. However, it may promote some future detriment to the patient exposed in this test. The future effects can be evaluating using absorbed dose values. A mammographic phantom should be chosen to simulate approximately the properties of a compressed breast in terms of the primary and dispersed radiation spectrum that exits its lower surface. The use of PMMA has important advantages. It is cheaper than substitutes for specially manufactured fabrics and is more available. The objective of this work will be to estimate the dose profile that a real breast would receive during a DTB examination. For this purpose a breast phantom with acrylic materials (PMMA) and dimensions similar to those of a real breast will be constructed, and the dose will be measured on the surface (ESAK profile) and in the middle cut (air kerma profile) of the breast phantom using the radiochromic film.
数字乳腺断层合成（DBT）是一种诊断乳腺组织变化的有效方法。然而，它可能会对接受该检查的患者造成一些未来的损害。可以使用吸收剂量值来评估未来的影响。应选择一个乳腺模型，以便根据从其下表面射出的初级和散射辐射光谱大致模拟压缩乳腺的特性。使用聚甲基丙烯酸甲酯（PMMA）有重要优势。它比专门制造的织物替代品便宜且更容易获得。这项工作的目的是估计在数字乳腺断层合成（DTB）检查期间真实乳房所接受的剂量分布。为此，将构建一个由丙烯酸材料（PMMA）制成且尺寸与真实乳房相似的乳腺模型，并使用放射变色胶片在乳腺模型的表面（表面空气比释动能分布）和中间切面（空气比释动能分布）测量剂量。
