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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...
4.6K
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

473
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
473
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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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...
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相关实验视频

Updated: Jul 14, 2025

Longitudinal Morphological and Physiological Monitoring of Three-dimensional Tumor Spheroids Using Optical Coherence Tomography
08:50

Longitudinal Morphological and Physiological Monitoring of Three-dimensional Tumor Spheroids Using Optical Coherence Tomography

Published on: February 9, 2019

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高动态范围的3D运动跟踪使用循环扫描与光学连贯性断层扫描的循环扫描.

Senyue Hao1, Marcello Magri Amaral2,3, Chao Zhou1,2

  • 1Department of Electrical & Systems Engineering, Washington University in Saint Louis, USA.

Biomedical optics express
|October 6, 2023
PubMed
概括

这项研究引入了一种新的循环光学连贯断层扫描 (OCT) 方法,以精确追踪生物样本运动. 这种技术使得精确的运动补偿能够对活体主体进行增强的微观和宏观成像.

科学领域:

  • 生物医学成像技术 生物医学成像技术
  • 光学物理学 光学物理学
  • 显微镜的使用方法

背景情况:

  • 来自生理过程 (心跳,呼吸,静止) 的运动工件显著降低了活体对象成像.
  • 精确跟踪生物样本运动对于高分辨率显微镜和宏观成像应用至关重要.

研究的目的:

  • 开发和验证一种方法,用于精确跟踪生物样本中横向和轴向运动.
  • 为了实现积极的运动补偿,以提高体内成像质量.

主要方法:

  • 使用圆形光学连贯性断层扫描 (OCT) 扫描来捕捉样品的运动.
  • 实现了循环扫描模式设置的自适应控制,以优化测量.
  • 应用跨框架和内框架分析,用于快速,高精度的运动量化.

主要成果:

  • 成功跟踪生物样本运动在广泛的速度范围 (微米/秒到厘米/秒).
  • 实现了运动大小和方向的快速和高精度测量.
  • 证明了实时运动补偿的潜力.

结论:

  • 开发的循环OCT方法为生物样本提供了准确的运动跟踪.

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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT

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Last Updated: Jul 14, 2025

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Longitudinal Morphological and Physiological Monitoring of Three-dimensional Tumor Spheroids Using Optical Coherence Tomography

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  • 这种技术构成了先进主动运动补偿策略的基础.
  • 未来的in vivo微观和宏观成像将从这种运动校正方法中受益.