Initial assessment of tumor tracking with a gimbaled linac system in clinical circumstances: A patient simulation study

被引：78

作者：

Depuydt, Tom ^{[1
,2
]}

Poels, Kenneth ^{[1
,2
]}

Verellen, Dirk ^{[1
,2
]}

Engels, Benedikt ^{[1
]}

Collen, Christine ^{[1
]}

Haverbeke, Chloe ^{[1
]}

Gevaert, Thierry ^{[1
]}

Buls, Nico ^{[1
,3
]}

Van Gompel, Gert ^{[3
]}

Reynders, Truus ^{[1
]}

Duchateau, Michael ^{[1
]}

Tournel, Koen ^{[1
]}

Boussaer, Marlies ^{[1
]}

Steenbeke, Femke ^{[1
,2
]}

Vandenbroucke, Frederik ^{[3
]}

De Ridder, Mark ^{[1
,2
]}

机构：

[1] Vrije Univ Brussel, Dept Radiotherapy, B-1090 Brussels, Belgium

[2] Vrije Univ Brussel, Fac Med & Pharm, B-1090 Brussels, Belgium

[3] Vrije Univ Brussel, Dept Radiol, B-1090 Brussels, Belgium

来源：

RADIOTHERAPY AND ONCOLOGY | 2013年 / 106卷 / 02期

关键词：

Tumor tracking; Stereotactic body radiation therapy; Organ motion; RADIATION-THERAPY; MOTION; RADIOTHERAPY; CYBERKNIFE; ACCURACY; VOLUME;

D O I：

10.1016/j.radonc.2012.12.015

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

Purpose: To have an initial assessment of the Vero Dynamic Tracking workflow in clinical circumstances and quantify the performance of the tracking system, a simulation study was set up on 5 lung and liver patients. Methods and materials: The preparatory steps of a tumor tracking treatment, based on fiducial markers implanted in the tumor, were executed allowing pursuit of the tumor with the gimbaled linac and monitoring X-rays acquisition, however, without activating the 6 MV beam. Data were acquired on workflow time-efficiency, tracking accuracy and imaging exposure. Results: The average time between the patient entering the treatment room and the first treatment field was about 9 min. The time for building the correlation model was 3.2 min. Tracking errors of 0.55 and 0.95 mm (1 sigma) were observed in PAN/TILT direction and a 2D range of 3.08 mm. A skin dose was determined of 0.08 mGy/image, with a source-to-skin distance of 900 mm and kV exposure of 1 mAs. On average 1.8 mGy/min kV skin dose was observed for 1 Hz monitoring. Conclusion: The Vero tracking solution proved to be fully functional and showed performance comparable with other real-time tracking systems. (C) 2013 Elsevier Ireland Ltd. All rights reserved. Radiotherapy and Oncology 106 (2013) 236-240

引用

页码：236 / 240

页数：5

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