Comparison of dose–volume analysis between standard Manchester plan and magnetic resonance image-based plan of intracavitary brachytherapy for uterine cervical cancer
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Authors
Takenaka, Tadashi
Yoshida, Ken
Tachiiri, Seiji
Yamazaki, Hideya
Aramoto, Kazumasa
Furuya, Seiichi
Yoshida, Mineo
Ban, Chiaki
Tanaka, Eiichi
Honda, Kazuya
Issue Date
2012-07-10
Type
Article
Language
en_US
Keywords
Image-Based Intracavitary Brachytherapy , MRI-Adapted Applicator , Uterine Cervical Cancer , Dose–Volume Histogram
Alternative Title
Abstract
To investigate the feasibility of image-based intracavitary brachytherapy (IBICBT) for uterine cervical cancer, we evaluated the dose–volume histograms (DVHs) for the tumor and organs at risk (OARs) and compared results from the IBICBT plan and the standard Manchester system (Manchester plan) in eight patients as a simulation experiment. We performed magnetic resonance imaging (MRI) and computed tomography (CT) following MRI-adapted applicator insertion, then superimposed MR images on the planning CT images to describe the contours of high-risk clinical target volume (HR CTV) and OARs. The median volume of HR CTV was 29 cm3 (range, 21–61 cm3). Median D90 (HR CTV) and V100 (HR CTV) were 116.1% prescribed doses (PD) (90.0–150.8%) and 96.7% (84.2–100%), respectively, for the Manchester plan. In comparison, we confirmed that the median D90 (HR CTV) was 100% PD in the IBICBT plan for all patients. Mean D2cc (bladder) was 101.8% PD for the Manchester plan and 83.2% PD for the IBICBT plan. Mean D2cc (rectum) was 80.1% PD for the Manchester plan and 64.2% PD for the IBICBT plan. Mean D2cc (sigmoid) was 75% PD for the Manchester plan and 57.5% PD for the IBICBT plan. One patient with a large tumor (HR CTV, 61 cm3) showed lower D90 (HR CTV) with the Manchester plan than with the IBICBT plan. The Manchester plan may represent overtreatment for small tumors but insufficient dose distribution for larger tumors. The IBICBT plan could reduce OAR dosage while maintaining adequate tumor coverage.
Description
Citation
Takenaka, T., Yoshida, K., Tachiiri, S., Yamazaki, H., Aramoto, K., Furuya, S., Yoshida, M., Ban, C., Tanaka, E., & Honda, K. (2012). Comparison of dose-volume analysis between standard Manchester plan and magnetic resonance image-based plan of intracavitary brachytherapy for uterine cervical cancer. Journal of radiation research, 53(5), 791–797. https://doi.org/10.1093/jrr/rrs033
Publisher
Journal of Radiation Research