Simulation analysis of optimized brachytherapy for uterine cervical cancer: Can we select the best brachytherapy modality depending on tumor size?

Abstract Purpose To choose the optimal brachytherapeutic modality for uterine cervical cancer, we performed simulation analysis. Methods and Materials For each high-risk clinical target volume (HR CTV), we compared four modalities [classical conventional intracavitary brachytherapy (Conv ICBT), Imag...

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Veröffentlicht in:Brachytherapy 2016, Vol.15 (1), p.57-64
Hauptverfasser: Yoshida, Ken, Yamazaki, Hideya, Kotsuma, Tadayuki, Takenaka, Tadashi, Ueda, Mari Mikami, Miyake, Shunsuke, Tsujimoto, Yutaka, Masui, Koji, Yoshioka, Yasuo, Sumida, Iori, Uesugi, Yasuo, Shimbo, Taiju, Yoshikawa, Nobuhiko, Yoshioka, Hiroto, Tanaka, Eiichi, Narumi, Yoshifumi
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container_end_page 64
container_issue 1
container_start_page 57
container_title Brachytherapy
container_volume 15
creator Yoshida, Ken
Yamazaki, Hideya
Kotsuma, Tadayuki
Takenaka, Tadashi
Ueda, Mari Mikami
Miyake, Shunsuke
Tsujimoto, Yutaka
Masui, Koji
Yoshioka, Yasuo
Sumida, Iori
Uesugi, Yasuo
Shimbo, Taiju
Yoshikawa, Nobuhiko
Yoshioka, Hiroto
Tanaka, Eiichi
Narumi, Yoshifumi
description Abstract Purpose To choose the optimal brachytherapeutic modality for uterine cervical cancer, we performed simulation analysis. Methods and Materials For each high-risk clinical target volume (HR CTV), we compared four modalities [classical conventional intracavitary brachytherapy (Conv ICBT), Image-guided ICBT (IGICBT), intracavitary/interstitial brachytherapy (ICISBT), and interstitial brachytherapy (ISBT) with perineal approach] using dose-volume histograms using eight sizes of HR CTV (2 × 2 × 2 cm to 7 × 4 × 4 cm) and organs at risk model. Results InConv ICBT, the doses covered 90% of the HR CTV [ D90 (HR CTV)] decreased from 197% prescribed dose (PD) for the HR CTV size (2 × 2 × 2 cm) to 73% PD for 5 × 4 × 4 cm, whereas the other three modalities could achieve 100% PD for all HR CTV sizes. The minimum doses received by the maximally irradiated 2-cm3 volumes for organs at risks of IGICBT demonstrated lower values than those ofConv ICBT for the HR CTV size of 4 × 3 × 3 cm or smaller. ICISBT demonstrated lower values than those of IGICBT for 4 × 3 × 3 cm or larger. ISBT demonstrated lowest values for 5 × 4 × 4 cm or larger. Conclusions HR CTV size of 4 × 3 × 3 cm seems to be a threshold volume in this simulation analysis, and IGICBT is a better choice for smaller HR CTV than the threshold volume. On larger HR CTV, ICISBT or ISBT is the better choice.
doi_str_mv 10.1016/j.brachy.2015.10.002
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Methods and Materials For each high-risk clinical target volume (HR CTV), we compared four modalities [classical conventional intracavitary brachytherapy (Conv ICBT), Image-guided ICBT (IGICBT), intracavitary/interstitial brachytherapy (ICISBT), and interstitial brachytherapy (ISBT) with perineal approach] using dose-volume histograms using eight sizes of HR CTV (2 × 2 × 2 cm to 7 × 4 × 4 cm) and organs at risk model. Results InConv ICBT, the doses covered 90% of the HR CTV [ D90 (HR CTV)] decreased from 197% prescribed dose (PD) for the HR CTV size (2 × 2 × 2 cm) to 73% PD for 5 × 4 × 4 cm, whereas the other three modalities could achieve 100% PD for all HR CTV sizes. The minimum doses received by the maximally irradiated 2-cm3 volumes for organs at risks of IGICBT demonstrated lower values than those ofConv ICBT for the HR CTV size of 4 × 3 × 3 cm or smaller. ICISBT demonstrated lower values than those of IGICBT for 4 × 3 × 3 cm or larger. ISBT demonstrated lowest values for 5 × 4 × 4 cm or larger. Conclusions HR CTV size of 4 × 3 × 3 cm seems to be a threshold volume in this simulation analysis, and IGICBT is a better choice for smaller HR CTV than the threshold volume. On larger HR CTV, ICISBT or ISBT is the better choice.</description><identifier>ISSN: 1538-4721</identifier><identifier>EISSN: 1873-1449</identifier><identifier>DOI: 10.1016/j.brachy.2015.10.002</identifier><identifier>PMID: 26612700</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Brachytherapy ; Brachytherapy - methods ; Computer Simulation ; Dose-volume histograms ; Female ; Hematology, Oncology and Palliative Medicine ; Humans ; Models, Theoretical ; Organs at Risk ; Radiology ; Radiotherapy Dosage ; Radiotherapy Planning, Computer-Assisted ; Radiotherapy, Image-Guided - methods ; Simulation analysis ; Tumor Burden ; Uterine cervical cancer ; Uterine Cervical Neoplasms - pathology ; Uterine Cervical Neoplasms - radiotherapy</subject><ispartof>Brachytherapy, 2016, Vol.15 (1), p.57-64</ispartof><rights>American Brachytherapy Society</rights><rights>2016 American Brachytherapy Society</rights><rights>Copyright © 2016 American Brachytherapy Society. Published by Elsevier Inc. 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Methods and Materials For each high-risk clinical target volume (HR CTV), we compared four modalities [classical conventional intracavitary brachytherapy (Conv ICBT), Image-guided ICBT (IGICBT), intracavitary/interstitial brachytherapy (ICISBT), and interstitial brachytherapy (ISBT) with perineal approach] using dose-volume histograms using eight sizes of HR CTV (2 × 2 × 2 cm to 7 × 4 × 4 cm) and organs at risk model. Results InConv ICBT, the doses covered 90% of the HR CTV [ D90 (HR CTV)] decreased from 197% prescribed dose (PD) for the HR CTV size (2 × 2 × 2 cm) to 73% PD for 5 × 4 × 4 cm, whereas the other three modalities could achieve 100% PD for all HR CTV sizes. The minimum doses received by the maximally irradiated 2-cm3 volumes for organs at risks of IGICBT demonstrated lower values than those ofConv ICBT for the HR CTV size of 4 × 3 × 3 cm or smaller. ICISBT demonstrated lower values than those of IGICBT for 4 × 3 × 3 cm or larger. ISBT demonstrated lowest values for 5 × 4 × 4 cm or larger. Conclusions HR CTV size of 4 × 3 × 3 cm seems to be a threshold volume in this simulation analysis, and IGICBT is a better choice for smaller HR CTV than the threshold volume. 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Methods and Materials For each high-risk clinical target volume (HR CTV), we compared four modalities [classical conventional intracavitary brachytherapy (Conv ICBT), Image-guided ICBT (IGICBT), intracavitary/interstitial brachytherapy (ICISBT), and interstitial brachytherapy (ISBT) with perineal approach] using dose-volume histograms using eight sizes of HR CTV (2 × 2 × 2 cm to 7 × 4 × 4 cm) and organs at risk model. Results InConv ICBT, the doses covered 90% of the HR CTV [ D90 (HR CTV)] decreased from 197% prescribed dose (PD) for the HR CTV size (2 × 2 × 2 cm) to 73% PD for 5 × 4 × 4 cm, whereas the other three modalities could achieve 100% PD for all HR CTV sizes. The minimum doses received by the maximally irradiated 2-cm3 volumes for organs at risks of IGICBT demonstrated lower values than those ofConv ICBT for the HR CTV size of 4 × 3 × 3 cm or smaller. ICISBT demonstrated lower values than those of IGICBT for 4 × 3 × 3 cm or larger. ISBT demonstrated lowest values for 5 × 4 × 4 cm or larger. Conclusions HR CTV size of 4 × 3 × 3 cm seems to be a threshold volume in this simulation analysis, and IGICBT is a better choice for smaller HR CTV than the threshold volume. On larger HR CTV, ICISBT or ISBT is the better choice.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>26612700</pmid><doi>10.1016/j.brachy.2015.10.002</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-1654-8567</orcidid><orcidid>https://orcid.org/0000-0001-7508-7217</orcidid><orcidid>https://orcid.org/0000-0001-9993-5575</orcidid></addata></record>
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subjects Brachytherapy
Brachytherapy - methods
Computer Simulation
Dose-volume histograms
Female
Hematology, Oncology and Palliative Medicine
Humans
Models, Theoretical
Organs at Risk
Radiology
Radiotherapy Dosage
Radiotherapy Planning, Computer-Assisted
Radiotherapy, Image-Guided - methods
Simulation analysis
Tumor Burden
Uterine cervical cancer
Uterine Cervical Neoplasms - pathology
Uterine Cervical Neoplasms - radiotherapy
title Simulation analysis of optimized brachytherapy for uterine cervical cancer: Can we select the best brachytherapy modality depending on tumor size?
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