亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

SU-E-J-265: Practical Issues and Solutions in Reconstructing and Using 4DCT for Radiotherapy Planning of Lung Cancer

呼吸 放射治疗计划 放射治疗 肺癌 核医学 顶峰 运动(物理) 医学 扫描仪 计算机科学 计算机视觉 放射科 人工智能 肿瘤科 解剖
作者
Wei Lü,S.J. Feigenberg,B Yi,G Lasio,K Prado,W D' Souza
出处
期刊:Medical Physics [Wiley]
卷期号:41 (6Part10): 218-219 被引量:2
标识
DOI:10.1118/1.4888319
摘要

Purpose: To report practical issues and solutions in reconstructing and using 4DCT to account for respiratory motion in radiotherapy planning. Methods: Quiet breathing 4DCT was used to account for respiratory motion for patients with lung or upper abdomen tumor. A planning CT and a 4DCT were acquired consecutively with a Philips Brilliance CT scanner and Varian RPM System. The projections were reconstructed into 10 phases. In Pinnacle RTP system, we contour a GTV in each phase and unite all 10 GTVs as ITV. The ITV is then mapped to the planning CT. We describe practical issues, their causes, our solutions and reasoning during this process. Results: In 6 months, 9 issues were reported for 8 patients with lung cancer. For two patients, part of the GTV (∼50% and 10%) in planning CT fell outside the ITV in 4DCT. There was a 7 mm variation in first patient back position because less restricted immobilization had to be used. The second discrepancy was due to moderate variation in breathing amplitude. We extended the ITV to include the GTV since both variations may likely happen during treatment. A LUL tumor showed no motion due to a 10-s long no-breathing period. An RLL tumor appeared double due to an abnormally deeper breath at the tumor region. We repeated 4DCT reiterating the importance of quiet, regular breathing. One patient breathed too light to generate RPM signal. Two issues (no motion in lung, incomplete images in 90% phase) were due to incorrect tag positions. Two unexplainable errors disappeared when repeating reconstruction. In summary, 5 issues were patient-related and 4 were technique issues. Conclusion: Improving breathing regularity avoided large artifacts in 4DCT. One needs to closely monitor patient breathing. For uncontrollable variations, larger PTVs are necessary which requires appropriate communication between physics and the treating physician.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
大模型应助芝麻采纳,获得10
9秒前
13秒前
jjjjj发布了新的文献求助10
14秒前
Liufgui应助花凉采纳,获得20
14秒前
biubiubiu发布了新的文献求助10
16秒前
万能图书馆应助章鱼采纳,获得10
19秒前
jjjjj完成签到,获得积分20
24秒前
26秒前
章鱼发布了新的文献求助10
30秒前
牛八先生完成签到,获得积分10
31秒前
32秒前
孙燕应助jjjjj采纳,获得30
32秒前
Liufgui应助花凉采纳,获得20
47秒前
Ava关闭了Ava文献求助
47秒前
科研通AI2S应助liudy采纳,获得10
1分钟前
科研通AI2S应助sljzhangbiao11采纳,获得10
1分钟前
1分钟前
徐悦月发布了新的文献求助10
1分钟前
三笠发布了新的文献求助10
1分钟前
小刘完成签到,获得积分10
1分钟前
1分钟前
三笠完成签到,获得积分10
1分钟前
传奇3应助Liiiiiiiiii采纳,获得10
1分钟前
gt完成签到 ,获得积分10
1分钟前
1分钟前
文静栾完成签到 ,获得积分10
1分钟前
芝麻关注了科研通微信公众号
1分钟前
2分钟前
所所应助徐悦月采纳,获得10
2分钟前
2分钟前
核桃发布了新的文献求助10
2分钟前
2分钟前
芝麻发布了新的文献求助10
2分钟前
昏睡的沛柔完成签到 ,获得积分10
2分钟前
Aliya完成签到 ,获得积分10
2分钟前
酷波er应助科研通管家采纳,获得10
2分钟前
2分钟前
2分钟前
2分钟前
李李发布了新的文献求助10
2分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3990045
求助须知:如何正确求助?哪些是违规求助? 3532108
关于积分的说明 11256334
捐赠科研通 3270943
什么是DOI,文献DOI怎么找? 1805146
邀请新用户注册赠送积分活动 882270
科研通“疑难数据库(出版商)”最低求助积分说明 809228