The heterogeneous CTV-PTV margins should be given for different parts of tumors during tomotherapy
| Autor: | Jinhu Chen, Guanzhong Gong, Jie Lu, Ying Tong, Tonghai Liu, Yong Yin, Pinjing Cheng |
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| Rok vydání: | 2017 |
| Předmět: |
Dorsum
South china business.industry Megavoltage ct medicine.medical_treatment Head and neck tumors tomotherapy Tomotherapy 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Oncology MVCT 030220 oncology & carcinogenesis Medicine heterogeneity Nuclear science business Nuclear medicine Research Paper setup errors CTV-PTV margins |
| Zdroj: | Oncotarget |
| ISSN: | 1949-2553 |
| DOI: | 10.18632/oncotarget.21631 |
| Popis: | // Ying Tong 2 , Guanzhong Gong 1 , Jinhu Chen 1 , Jie Lu 1 , Tonghai Liu 1 , Pinjing Cheng 2 and Yong Yin 1 1 Radiation Physics Department of Shandong Cancer Hospital Affiliated to Shandong University, Jinan, China 2 School of Nuclear Science and Technology, University of South China, Hengyang, China Correspondence to: Yong Yin, email: yinyongsd@126.com Keywords: tomotherapy, MVCT, setup errors, CTV-PTV margins, heterogeneity Received: March 29, 2017 Accepted: August 07, 2017 Published: October 06, 2017 ABSTRACT Objective : The purpose of this study was to evaluate CTV-PTV margins of tumors for tomotherapy. Methods : Setup errors were analyzed for 151 patients receiving helical tomotherapy treatment. 53 patients had head and neck tumors, 45 had thoracic tumors, 20 had abdominal tumors, and 33 had pelvic tumors. The setup errors were calculated in six directions, i.e. +X (left), -X (right), +Y (head), -Y (foot), +Z (ventral), and -Z (dorsal), after Megavoltage CT (MVCT) images were registered to simulation CT images. And then the CTV-PTV margins were calculated. Results : The setup errors along the +Z direction were significantly higher than that along the –Z direction ( p |
| Databáze: | OpenAIRE |
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