Dose Verification for Respiratory-gated VMAT-SBRT Using Real-time Tumor Tracking System
| Autor: | Yukiharu Kuriyama, Daisuke Miyawaki, Yusuke Fujii, Shinsuke Tokura, Naoki Murakami, Masahiro Fujita, Kazunori Kaneda, Tetsuro Kawamura, Mamoru Hase |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.industry
Stereotactic body radiation therapy Radiotherapy Planning Computer-Assisted medicine.medical_treatment Normal tissue Radiotherapy Dosage General Medicine Radiosurgery Volumetric modulated arc therapy 030218 nuclear medicine & medical imaging Radiation therapy 03 medical and health sciences 0302 clinical medicine Neoplasms 030220 oncology & carcinogenesis Dose verification Tumor tracking Humans Medicine Radiotherapy Intensity-Modulated Tumor location Respiratory system Nuclear medicine business |
| Zdroj: | Japanese Journal of Radiological Technology. 76:674-688 |
| ISSN: | 1881-4883 0369-4305 |
| DOI: | 10.6009/jjrt.2020_jjrt_76.7.674 |
| Popis: | Recently, the introduction of various novel technologies in clinical settings has improved the accuracy of radiation therapy. Stereotactic body radiation therapy (SBRT) involves the delivery of an accurate radiation dose to the tumor with a minimal impact on normal tissues using various measures to address changes in the tumor position due to respiratory displacement. The SyncTraX FX4 real-time tumor tracking system (Shimadzu Corporation) introduced in our hospital tracks the actual tumor location by radioscopically monitoring a metallic marker that is placed in the vicinity of the tumor. However, there have been no reports yet on respiratory-gated volumetric modulated arc therapy (VMAT)-SBRT using a real-time tumor tracking system. This study aimed to develop an irradiation procedure for respiratory-gated VMAT-SBRT using a real-time tumor tracking system and to evaluate radiation doses therein. In this study, we found that absolute doses with respiratory gating did not deviate by more than ±1.0% from those without respiratory gating. In addition, the pass rate in gamma analysis using GAFCHROMIC EBT3 was ³95% with the pass criteria in dose difference, distance to agreement, and threshold being 2%, 2 mm, and 10%, respectively. Furthermore, a trajectory log file analysis did not reveal any significant error causes. Thus, these data indicate that respiratory-gated VMAT-SBRT can be applied clinically. |
| Databáze: | OpenAIRE |
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