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Computed Tomography

Computed Tomography

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 5, 2025

Diffusion Imaging in the Rat Cervical Spinal Cord

Diffusion Imaging in the Rat Cervical Spinal Cord

Published on: April 7, 2015

扩散CT:用于CT图像标准化的潜在扩散模型.

Md Selim^1,2, Jie Zhang³, Michael A Brooks³

¹Department of Computer Science.

AMIA ... Annual Symposium proceedings. AMIA Symposium

|January 15, 2024

概括

这项研究介绍了 DiffusionCT,一种基于扩散的新型模型,用于标准化计算机断层扫描 (CT) 图像. 扩散CT有效地协调来自不同扫描仪的医疗图像,改善肺癌研究的特征分析.

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相关实验视频

Last Updated: Jul 5, 2025

Diffusion Imaging in the Rat Cervical Spinal Cord

Diffusion Imaging in the Rat Cervical Spinal Cord

Published on: April 7, 2015

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Published on: July 28, 2013

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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
放射学放射学是一门学科.

背景情况:

计算机断层扫描 (CT) 对肺癌管理至关重要,但扫描仪协议的变化会产生不一致的图像纹理.
这些纹理变化在下游研究中对可靠的定量分析构成重大挑战.
目前的CT图像协调方法,通常是基于GAN的,其有效性有限.

研究的目的:

开发一种基于扩散的新型模型, DiffusionCT,用于协调从不同供应商和协议获得的CT图像.
为了解决现有的监督和半监督学习方法对CT图像标准化的局限性.
为了提高从CT扫描中提取的纹理特征的一致性和可靠性,用于临床应用.

主要方法:

DiffusionCT采用基于U-Net的编码器-解码器架构,在潜伏空间运行.
一个扩散模型集成到编码器-解码器的瓶中.
该模型经历了两阶段的训练过程:首先训练编码器解码器,然后训练潜伏扩散模型.

主要成果:

扩散CT成功地将潜在的非标准图像分布映射到标准图像中.
该模型从转换的潜伏表示中合成了标准化的CT图像.
实验结果显示,CT图像标准化任务的性能显著提高.

结论:

扩散CT为协调CT图像提供了一个有希望的新方法,克服了以前方法的局限性.
基于扩散的潜在空间协调提高了医学成像定量分析的可靠性.
这一进步有可能提高肺癌查,诊断和治疗监测的准确性.