Dosimetric effects of isocenter on intensity-modulated radiotherapy for MR-Linac / 中华放射医学与防护杂志
Chinese Journal of Radiological Medicine and Protection
;
(12): 433-437, 2022.
Article
in Chinese
| WPRIM
| ID: wpr-956802
ABSTRACT
Objective:
To analyze the dosimetric effects on off-center tumour treatment plan resulting from the MR-Linac-based isocenter position radiotherapy plan.Methods:
The cases of 19 patients who were treated in Sun Yat-sen University Cancer Center in 2020 were collected in this study. Two different IMRT plans were designed for each patient with off-center tumor both for group A with planned isocenter position as IMRT and group B with planed target center position as geometric center. The conformity index and homogeneity index of target, the dose normal tissue and the number of MU were compared between two plans.Results:
The two IMRT plans met clinical dosimetric requirements. No statistical differences were found both in homogeneity index and conformity index ( P>0.05). Also there was no differences found in doses to normal tissues. However, the MU number (1 149±903, t=2.804, P=0.012) in group A was higher than that in group B (970±652).Conclusions:
It is feasible to perform MR-Linac-based off-center treatment plan.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Chinese Journal of Radiological Medicine and Protection
Year:
2022
Type:
Article
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