双能CT虚拟单能量图像在放疗计划系统中的应用研究

李京; 肖青; 张祥斌; 戴谷宇; 柏森; 钟仁明

doi:10.3969/j.issn.1671-7104.2021.05.021

双能CT虚拟单能量图像在放疗计划系统中的应用研究

四川大学华西医院放疗科, 成都市, 610041

详细信息

作者简介:
李京,E-mail:lijing_scu@foxmail.com

通讯作者:
柏森,E-mail:baisen@scu.edu.cn

中图分类号: TH774
计量
- 文章访问数: 42
- HTML全文浏览量: 0
- PDF下载量: 9
出版历程
- 收稿日期: 2020-10-25
- 网络出版日期: 2024-02-19
- 刊出日期: 2021-09-29

Application of Virtual Monochromatic Images Reconstructed by Dual-energy Computed Tomography in Radiotherapy Treatment Planning System

Department of Radiation Oncology, West China Hospital of Sichuan University, Chengdu, 610041

摘要

摘要: 双能CT（dual-energy CT，DECT）扫描后重建的虚拟单能量图像（virtual monochromatic images，VMI）在放疗中有极大的应用前景，目前尚缺乏临床剂量验证。该研究使用GE Revolution CT扫描仪对仿真头模和体模进行常规成像和双能的宝石能谱成像（gemstone spectral imaging，GSI），将常规图像和多组VMI导入治疗计划系统（treatment planning system，TPS）中，通过移植相同的放疗计划对比CT值和剂量分布。结果表明，VMI均可导入TPS中进行CT值-相对电子密度转换和剂量计算，且70~140 keV的单能量图像与常规CT图像的6 MV光子计划剂量分布差异较小。
- 双能CT /
- 虚拟单能量成像 /
- 放疗 /
- 剂量分布
Abstract: Virtual monochromatic images (VMI) that reconstructed on dual-energy computed tomography (DECT) have further application prospects in radiotherapy, and there is still a lack of clinical dose verification. In this study, GE Revolution CT scanner was used to perform conventional imaging and gemstone spectral imaging on the simulated head and body phantom. The CT images were imported to radiotherapy treatment planning system (TPS), and the same treatment plans were transplanted to compare the CT value and the dose distribution. The results show that the VMI can be imported into TPS for CT value-relative electron density conversion and dose calculation. Compared to conventional images, the VMI varies from 70 to 140 keV, has little difference in dose distribution of 6 MV photon treatment plan.
- dual-energy CT /
- virtual monochromatic images /
- radiotherapy /
- dose distribution

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参考文献(21)

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