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Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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在数字乳腺图莫合成系统中重新审视文物传播功能的评估.

Jesus G Ovejero1, Miguel Alarcia2, José Carlos Barba2

  • 1Service of Dosimetry and Radioprotection, Hospital General Universitario Gregorio Marañón, C. Dr. Esquerdo, 46, 28007 Madrid, Spain; Department of Radiation Physics and Radiation Protection, Clínica Universidad de Navarra, Avda. Marquesado de Santa Marta, 1, 28027 Madrid, Spain.

Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)
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概括

数字乳房图解合成 (DBT) 成像中的拉链文物可以阻碍癌症检测. 这项研究发现,评估这些文物的最佳方法因成像系统而异,强调需要标准化,系统特定的文物评估.

关键词:
的球体是的球体.人工制品扩展功能扩展功能数字乳房图解合成 数字乳房图解合成幻影 幻影是一个幻影.的文物 的文物拉链工艺品 拉链工艺品

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科学领域:

  • 医疗成像医学成像
  • 放射学 放射学是一门学科.
  • 生物医学工程 生物医学工程

背景情况:

  • 数字乳腺图莫合成 (DBT) 对于乳腺癌检测至关重要.
  • 在DBT图像中的拉链文物使准确的诊断变得复杂.
  • 缺乏用于评估拉链文物的标准化方法.

研究的目的:

  • 为了确定最优的方法来表征拉链文物.
  • 使用人工物扩散函数 (ASF) 的半最大全宽度 (FWHM) 作为度量.
  • 为了使用球幽灵来生成拉链工件.

主要方法:

  • 在GE Senographe Pristine (SP-GE) 和Hologic Selenia Dimensions (SD-HO) 系统上比较了拉链工件的表征.
  • 使用最大值,平均值和混合方法计算ASF.
  • 由,,,陶标记物和商业幻影产生的评估ASF.

主要成果:

  • 混合ASF方法对于SP-GE系统是最可靠的.
  • 平均值ASF方法最适合SD-HO系统.
  • 在大多数方法中,陶和标记更好地复制了临床拉链文物.

结论:

  • 选择合适的文物评估方法取决于具体的DBT系统.
  • 需要采用标准化的方法来考虑在文物评估中的系统特定差异.
  • 准确的文物评估对于使用DBT可靠的乳腺癌诊断至关重要.