技术说明:实现和不确定性分析可调节的3D结构乳腺幻影在数字乳腺图解合成
Elisabeth Salomon1, Ewald Unger1, Peter Homolka1
1Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Spitalgasse, Vienna, Austria.
Medical physics
|July 13, 2023
概括
为了数字乳腺断层合成 (DBT) 质量保证,开发了一种具有结构背景的新型3D乳腺幻影. 这种先进的幻影表现出可重现的质量特性和适当的衰减差异,使其适合DBT质量控制.
科学领域:
- 医学成像物理 医学成像物理
- 放射学幻象 放射学幻象
- 数字乳腺图莫合成 (DBT) 技术
背景情况:
- 传统的2D成像幻影通常缺乏对均质背景的优化,这限制了它们在评估复杂的成像技术 (如DBT) 中的实用性.
- 需要建立和接受的幻影,专门用于评估DBT系统中的图像质量.
- 现有的幻影可能不能充分代表乳腺组织和病变的变化和复杂性.
研究的目的:
- 为DBT质量保证引入一个先进的,可适应的3D乳房幻影,具有结构化的,可变的背景.
- 描述这种新型幻影的设计和应用,用于DBT设备中的客观质量保证测量.
- 将四种幻影变体进行比较,以评估幻影生产和性能中的客观性和可重现性.
主要方法:
- 幻影设计得到了更大的容器 (直径24厘米,高度53.5毫米) 的增强,并用五个非状质量取代了状质量,以提高分辨率.
- 采用双组件3D打印进行大规模制造,并采用新材料来增加损伤模型和背景之间的衰减差异.
- 评估了人内观察员,人间观察员和幽灵间的变化,以确定可重现性,计算方差系数 (V).
主要成果:
- 在病变模型和背景之间实现了0.20厘米-1的衰减差异,与临床场景相比 (0.21厘米-1为50/50腺体/脂肪组织).
- 幻影显示出PMMA相当于西门子Mammomat启示的47.0毫米厚度.
- 对于质量检测 (观察者内部:0.248,观察者间:0.383) 和微化 (0.0429),观察到低方差系数,表明可重现性好.
结论:
- 开发的3D乳房幻影展示了模拟质量的可重现的定位,方向和形状,并具有适当的衰减差异.
- 幻影是一个可行的候选人质量控制测试在数字乳腺图解合成.
- 这种先进的幻影设计为评估DBT系统性能提供了更好的客观性和可靠性.
更多相关视频
06:33Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement
Published on: July 29, 2013
11.4K
08:41Patient-Specific Polyvinyl Alcohol Phantom Fabrication with Ultrasound and X-Ray Contrast for Brain Tumor Surgery Planning
Published on: July 14, 2020
8.5K
相关概念视频
Computed Tomography
4.6K
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...
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...
4.6K
Imaging Studies III: Computed Tomography
28
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
28
