Verification of X-sight Lung Tracking System in the CyberKnife.
- Author:
Hyun Do HUH
1
;
Sang Hyoun CHOI
;
Woo Chul KIM
;
Hun Jeong KIM
;
Seong Hoon KIM
;
Sam Ju CHO
;
Chul Ki MIN
;
Kwang Hwan CHO
;
Sang Hoon LEE
;
Jinho CHOI
;
Sangwook LIM
;
Dong Oh SHIN
Author Information
1. Department of Radiation Oncology, College of Medicine, Inha University, Incheon, Korea.
- Publication Type:Original Article
- Keywords:
X-sight lung tracking;
Fiducial;
CyberKnife
- MeSH:
Fiducial Markers;
Humans;
Lung;
Pneumothorax;
Radiosurgery;
Respiration;
Thorax;
Track and Field
- From:Korean Journal of Medical Physics
2009;20(3):174-179
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
To track moving tumor in real time, CyberKnife system imports a technique of the synchrony respiratory tracking system. The fiducial marker which are detectable in X-ray images were demand in CyberKnife Robotic radiosurgery system. It issued as reference markers to locate and track tumor location during patient alignment and treatment delivery. Fiducial marker implantation is an invasive surgical operation that carries a relatively high risk of pneumothorax. Most recently, it was developed a direct lung tumor registration method that does not require the use of fiducials. The purpose of this study is to measure the accuracy of target applying X-sight lung tracking using the Gafchromic film in dynamic moving thorax phantom. The X-sight Lung Tracking quality assurance motion phantom simulates simple respiratory motion of a lung tumor and provides Gafchromic dosimetry film-based test capability at locations inside the phantom corresponding to a typical lung tumor. The total average error for the X-sight Lung Tracking System with a moving target was 0.85+/-0.22 mm. The results were considered reliable and applicable for lung tumor treatment in CyberKnife radiosurgery system. Clinically, breathing patterns of patients may vary during radiation therapy. Therefore, additional studies with a set real patient data are necessary to evaluate the target accuracy for the X-sight Lung Tracking system.
