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Computed Tomography01:10

Computed Tomography

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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可重复性,可复制性和三种光学连贯性断层扫描仪器的一致性.

Jiali Zhang1, Muhan Zhong1, Shuqi Fan1

  • 1National Engineering Research Center of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China.

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三种光学连贯性断层扫描 (OCT) 装置在测量视网膜 (RT) 和胸膜厚度 (ChT) 中表现出极好的重复性和可重复性. 然而,发现了重要的设备间协议问题,影响了临床一致性.

关键词:
协议 协议 协议 协议冠状腺厚度 冠状腺厚度光学连贯性断层扫描仪可重复性 可重复性可复制性 可复制性视网膜的厚度 视网膜的厚度

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科学领域:

  • 眼科医生 眼科 眼科
  • 生物医学工程 生物医学工程
  • 医疗成像医学成像

背景情况:

  • 光学连贯断层扫描 (OCT) 对于评估视网膜和胸膜厚度 (RT和ChT) 是至关重要的.
  • 评估不同OCT设备的一致性对于可靠的临床数据和研究至关重要.
  • 在OCT设备之间的变化可能会影响诊断准确性和治疗监测.

研究的目的:

  • 评估三种用于测量RT和ChT的OCT设备 (VG200I,Triton,RTVue) 的可重复性,可复制性和一致性.
  • 为了比较使用内置软件获得的测量结果与用于冠状腺厚度 (ChT) 的自定义算法.
  • 为了确定在不同OCT平台的厚度测量中可能存在的差异.

主要方法:

  • 用VG200I,Triton和RTVue OCT设备分析了68只眼睛.
  • 可重复性由一个操作员进行两个检查来评估;可重复性由第二个操作员进行.
  • 测量包括平均RT/ChT (VG200I,Triton) 和底RT/ChT (SFRT,SFChT) (RTVue),并比较了ChT的自动化和定制算法.

主要成果:

  • 这三种OCT设备都表现出高的重复性和可重复性,其类内相关系数 (ICC) 通常高于0.760.
  • 在SFRT,SFChT和整体RT/ChT测量中观察到显著的设备间差异.
  • 虽然机器之间的相关性很高 (ρ > 0.655),但平均差异表明设备之间的一致性很差.

结论:

  • 经过评估的OCT设备在RT和CHT测量方面表现出强大的重复性和可重复性.
  • 尽管单个器件一致性很高,但在三个OCT器件之间发现一致性很差.
  • 临床使用需要仔细考虑特定于设备的测量和潜在的设备间变异性.