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相关概念视频

Positron Emission Tomography01:29

Positron Emission Tomography

4.3K
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 III: Computed Tomography01:27

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
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

156
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
156
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

280
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
280
Computed Tomography01:10

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...
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相关实验视频

Updated: Jul 19, 2025

Author Spotlight: Standardizing Mouse In Vivo PET Imaging with Body Conforming Molds and Automated Analysis
07:45

Author Spotlight: Standardizing Mouse In Vivo PET Imaging with Body Conforming Molds and Automated Analysis

Published on: October 25, 2024

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增强的PET成像使用渐进的条件深度图像之前的图像.

Jinming Li1,2, Chen Xi2, Houjiao Dai2

  • 1School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.

Physics in medicine and biology
|August 15, 2023
PubMed
概括
此摘要是机器生成的。

一种新的渐进式无监督学习方法提高了正电子发射断层扫描 (PET) 图像质量和病变检测能力,优于传统方法并匹配监督方法.

关键词:
图像重建PET图像的重建深度图像之前的图像.深度渐进式学习 (deep progressive learning) 是一种深度渐进式学习.神经网络的神经网络的神经网络

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Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia
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Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia

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Author Spotlight: Standardizing Mouse In Vivo PET Imaging with Body Conforming Molds and Automated Analysis
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Author Spotlight: Standardizing Mouse In Vivo PET Imaging with Body Conforming Molds and Automated Analysis

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Author Spotlight: Enhanced Quantification of Cardiovascular Calcification Progression for Longitudinal Micro PET/CT Studies in Small Research Animals
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Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia
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Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia

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科学领域:

  • 医疗成像医学成像
  • 人工智能的人工智能
  • 核医学是一种核医学.

背景情况:

  • 无监督学习提高了用有限数据的正电子发射断层扫描 (PET) 图像质量.
  • 直接无监督学习与大量输入到目标图像差距作斗争,可能会降低病变的检测能力.

研究的目的:

  • 开发一种新的无监督学习方法,以提高PET患者研究中的病变检测能力.
  • 解决无监督学习中的挑战,当输入和目标PET图像之间存在显著差异时.

主要方法:

  • 采用了深度渐进式学习策略,将单步无监督学习分解为两个阶段.
  • 第一个网络使用解剖图像;第二个使用低噪音PET图像和第一个网络的输出作为代重建的先前信息.

主要成果:

  • 提出的渐进式无监督方法与非深度学习和标准无监督方法相比,表现优越.
  • 它的有效性在幻影和患者研究中得到了验证,取得了与监督学习方法相似的结果.

结论:

  • 一种渐进的无监督学习方法有效地改善了PET图像噪声性能和病变检测能力.
  • 这种方法在没有大量数据集的情况下,为监督学习提供了可行的替代方案.