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相关概念视频

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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Deconvolution01:20

Deconvolution

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Deconvolution, also known as inverse filtering, is the process of extracting the impulse response from known input and output signals. This technique is vital in scenarios where the system's characteristics are unknown, and they must be inferred from the observable signals.
Deconvolution involves several mathematical techniques to derive the impulse response. One common approach is polynomial division. In this method, the input and output sequences are treated as coefficients of...
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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...
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Imaging Studies I: CT and MRI01:14

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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...
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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography
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自主监督的深度学习,用于联合3D低剂量PET/CT图像去噪声.

Feixiang Zhao1, Dongfen Li1, Rui Luo2

  • 1State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610000, China.

Computers in biology and medicine
|September 17, 2023
PubMed
概括

这项研究引入了一种新的自我监督深度学习框架,用于联合拒绝低剂量PET和CT扫描. 该方法,MAsk-then-Cycle (MAC),有效地同时拒绝了这两种模式,而不需要对齐的数据对.

关键词:
3D PET/CT 无色化 3D PET/CT 无色化深度学习是一种深度学习.低剂量的PET/CT图像.自主监督学习学习

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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
  • 图像处理 图像处理

背景情况:

  • 深度学习 (DL) 在消除低剂量正子发射断层扫描 (LDPET) 和低剂量计算机断层扫描 (LDCT) 中表现出色.
  • 现有的DL方法通常专注于单一的方法,需要广泛的低剂量/正常剂量样本对,这些样本很难获得.
  • 通过单一网络同时消除LDPET和LDCT的污染仍未得到充分探索.

研究的目的:

  • 制定一个自我监督的框架,用于联合LDPET/LDCT的申诉.
  • 为了克服需要精确对齐的低剂量/正常剂量样本对的局限性.
  • 提高医疗图像的稳定性,减少无色化医疗图像中的文物.

主要方法:

  • 提出了一个名为MAsk-then-Cycle (MAC) 的两阶段自主监督培训框架.
  • 第1阶段:基于面具自动编码器 (MAE) 的预训练,用于对像素级限制的强加.
  • 第二阶段:循环自我重组 (CSR) 策略,用于自主监督的无对齐对的无声化,分离和重组噪声组件.

主要成果:

  • 与现有方法相比,拟议的MAC框架在联合LDPET/LDCT排毒中取得了更高的性能.
  • 企业社会责任战略有效地实现了无效化,而不需要对齐的样本对.
  • 在MAE预训练中,成功地强加了像素级限制,减轻了自我监督方法中常见的工件.

结论:

  • 该MAC框架代表了首个自我监督的方法,用于联合LDPET/LDCT的报销.
  • 这种方法是稳定的,因为它不依赖于有关数据的先前假设.
  • 这种方法提供了一个更灵活,更有效的解决方案,以提高低剂量医学成像的质量.