Quantitative analysis of the intra-beam respiratory motion with baseline drift for respiratory-gating lung stereotactic body radiation therapy
| Autor: | Hideaki Ikoma, Yoshio Tamaki, Kenji Yasue, Satoshi Oyama, Hiraku Fuse, Tatsuya Fujisaki, Koichi Hanada, Kazuya Shinoda |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Lung Neoplasms
residual motion Stereotactic body radiation therapy Movement Health Toxicology and Mutagenesis Gating baseline drift respiratory-gating method Radiosurgery Oncology/Medicine Motion Humans Medicine Radiology Nuclear Medicine and imaging Expiration Lung Radiation business.industry Respiratory motion stereotactic body radiation therapy (SBRT) Baseline drift Amplitude medicine.anatomical_structure AcademicSubjects/SCI00960 AcademicSubjects/MED00870 business Nuclear medicine Beam (structure) |
| Zdroj: | Journal of Radiation Research |
| ISSN: | 1349-9157 0449-3060 |
| DOI: | 10.1093/jrr/rrab098 |
| Popis: | This study aimed to quantitatively clarify the baseline drift for each respiratory cycle in two respiratory-gating methods using the intra-beam respiratory motion data of lung cancer patients. The residual motion and dose distribution were calculated based on intra-beam respiratory motion data with the baseline drift. To quantify the baseline drift \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$\Delta$\end{document} during irradiation, it was defined as the inclination between the detected expiration point and the expiration point in the next cycle in the anterior–posterior (AP), cranial–caudal (CC) and left–right (LR) directions obtained using an in-house programme. The baseline drift value reached up to 0.74 mm/s in the CC direction as per the respiratory motion data of 10 patients. The homogeneity index (HI) of the phase-gating method tended to increase because the target was irradiated even when the amplitude position of the target differed from period to period. In contrast, the amplitude-gating method enabled irradiation considering the amplitude position of the target because the gating window was set considering the amplitude position of the respiratory motion. The respiratory-gating methods and respiratory phase in respiratory-gating lung stereotactic body radiation therapy (SBRT) must be determined based on the respiratory motion of the patients. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|