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相关概念视频

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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Positron Emission Tomography01:29

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
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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 26, 2025

Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time
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基于LED的全视图光声学断层扫描.

Xiang Liu1,2, Sandeep Kumar Kalva1,2, Berkan Lafci1,2

  • 1Institute of Pharmacology and Toxicology and Institute for Biomedical Engineering, Faculty of Medicine, University of Zurich, Zurich CH-8057, Switzerland.

Photoacoustics
|June 21, 2023
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概括

一个全新的基于LED的全视光声学断层扫描 (FLOAT) 系统为深层组织成像提供了一个具有成本效益的替代方案. 这种便携式系统表现出与传统激光器相当的性能,提高了各种应用的可访问性.

关键词:
激光 激光器 激光器 激光器发光二极管是一种发光二极管.价格低廉的光源可以提供光源.光声学/光声学断层扫描

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科学领域:

  • 生物医学光学 生物医学光学
  • 医学成像技术 医学成像技术
  • 声学成像 声学成像

背景情况:

  • 光声学断层扫描通常依赖于重,昂贵的激光器.
  • 发光二极管 (LED) 为光声刺激提供了一个便携且具有成本效益的替代方案.
  • 现有的系统在深层组织成像的视野和图像质量方面存在局限性.

研究的目的:

  • 引入基于LED的全视光声学断层扫描 (FLOAT) 系统,用于体内深层组织成像.
  • 为光声断层扫描提供一个经济高效,便携,稳定的照明源.
  • 为了提高图像质量并规避横截面成像中的有限视图效果.

主要方法:

  • 开发了一个定制的电子单元来驱动一个堆叠的LED阵列用于光声信号激发.
  • 将LED阵列与圆形阵列的圆柱状聚焦超声波探测器集成在一起,以实现全视图断层扫描配置.
  • 系统性能特征包括脉冲宽度,功率稳定性,光分布,信号噪声比和透深度.

主要成果:

  • FLOAT系统实现了100 ns脉冲宽度和0.48 mJ每脉冲能量,具有高稳定性 (0.62% std dev).
  • 全视图配置有效地解决了有限视图效应,改善了视野和图像质量.
  • 人类手指的成像显示性能与标准脉冲Nd:YAG激光相提并论.

结论:

  • FLOAT系统为光声成像提供了一种紧,价格实惠和多功能的照明技术.
  • 这种基于LED的方法可以在资源有限的环境中显著推进光声学成像.
  • FLOAT技术对更广泛的生物和临床应用具有前景.