双能光子吸收法提高CT衬度(密度)分辨率的研究

陈惟昌; 陈志华; 赵天德; 王自强

双能光子吸收法提高CT衬度(密度)分辨率的研究

中日友好临床医学研究所, 北京 100029

基金项目:

国家自然科学基金资助项目(60171040)

详细信息

作者简介:
陈惟昌,男,中日友好临床医学研究所研究员;国家重大基础科学研究计划(973)咨询专家。在中国首次介绍PET原理及参与中国第一台PET的开发与应用

中图分类号: TP391.41
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出版历程
- 收稿日期: 2002-09-14
- 网络出版日期: 2022-12-16

Improvement of CT Contrast (Density) Resolution By Dual Photons Absorption Method

China Japan Friendship Institute of Medical Sciences, Beijing 100029

摘要

摘要: 目的提高CT衬度的分辨率。30年来,医学CT经历了原始的第一代CT发展至目前第5代高分辨率CT和高速电子束CT,其成像的空间分辨率和时间分辨率均有明显提高。但CT成像的衬度(密度)分辨率提高并不显著,而衬度分辨率与图像的灰度等级(灰阶)密切相关,是图像清晰度的重要参数。本文对应用双能量光子扫描吸收法以提高CT衬度(密度)分辨率的原理进行分析,并探讨其实际应用的可行性。
- CT成像 /
- 衬度 /
- 分辨率 /
- 双能光子 /
- 吸收
Abstract: Purpose Improvement of CT contrast resolution since 1973, medical CT has gained great progress to improve its spatial and temporal resolutions. Recently, the spatial resolution of the fifth generation of medical CT of high resolution has reached 0.35mm. The temporal resolution of the high speed electronic beam CT has reached 20ms per frame. But the improvement of the CT contrast (density) resolution is not significant. Since the CT contrast (density) resolution is closely correlated with the gray grade of CT image and is very important to the distinction of CT images, so it is necessary to investigate how to improve the contrast resolution of the CT images. Method and Conclusion The principle and mechanism of the dual photons absorption method to improve the CT contrast (density) resolution were suggested and analyzed. The feasibility of this method in practical application was also discussed.
- CT Images /
- Contrast /
- Resolution /
- Dual Photons /
- Absorption.