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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

Positron Emission Tomography

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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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Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
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相关实验视频

Updated: Jun 9, 2025

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
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光子计数计算机断层扫描在放射学中的应用.

Oktay Algin1,2,3, Nazime Tokgoz4, Filippo Cademartiri5

  • 1Interventional MR Clinical R&D Institute, Ankara University, Ankara, Türkiye.

Polish journal of radiology
|October 24, 2024
PubMed
概括

光子计数检测器CT (PCD-CT) 提供了更好的成像质量,剂量降低和病变歧视. 虽然干预性放射学具有前景,但需要进一步的研究来解决成本和挑战.

关键词:
工艺品 工艺品是一种艺术品.计算机断层扫描 (CT) 是一种计算机断层扫描.剂量降低剂量降低的方法多对比图像成像多对比图像成像光子计数探测器 (PCD) 是一个光子计数探测器.

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A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
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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.
  • 诊断技术 诊断技术的使用

背景情况:

  • 光子计数探测器计算机断层扫描 (PCD-CT) 技术已经研究了多年,但最近才进入临床实践.
  • 预计PCD-CT将提供诸如降低辐射剂量,增强组织分化,人工物减少和多对比成像等好处.
  • 初步研究表明,PCD-CT可以实现降噪和更高的空间分辨率,即使在困难的扫描场景中.

研究的目的:

  • 审查PCD-CT系统的特点,特别关注其在干预放射学中的应用.
  • 突出PCD-CT在图像质量和诊断能力方面与传统CT技术相比具有优势.

主要方法:

  • 这是一个图片综述,说明PCD-CT系统的特性和应用.
  • 该审查侧重于干预领域,并比较PCD-CT性能与传统CT.

主要成果:

  • 与传统CT相比,PCD-CT在各种临床条件下表现出优越的图像质量和病变歧视.
  • 通过PCD-CT技术观察到血管成像的显著进展.
  • 实验和初步研究支持PCD-CT的假设好处.

结论:

  • 在图像质量和诊断潜力方面,PCD-CT提供了显著的改进,特别是在血管成像和干预程序中.
  • 这项技术仍处于起步阶段,存在已知的挑战和警告,包括与传统CT单元相比,成本显著更高.
  • 需要进一步的研究来验证临床益处,解决局限性,并证明PCD-CT系统的投资增加是合理的.