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Radiation Oncology
Published in: Radiation Oncology 1/2015

Open Access 01-12-2015 | Research

Three-dimensional conformal arc radiotherapy using a C-arm linear accelerator with a computed tomography on-rail system for prostate cancer: clinical outcomes

Authors: Atsuhiro Kumabe, Noboru Fukuhara, Takuji Utsunomiya, Takatsugu Kawase, Kunihiro Iwata, Yukinori Okada, Shinya Sutani, Toshio Ohashi, Mototsugu Oya, Naoyuki Shigematsu

Published in: Radiation Oncology | Issue 1/2015

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Abstract

Background

We report the feasibility and treatment outcomes of image-guided three-dimensional conformal arc radiotherapy (3D-CART) using a C-arm linear accelerator with a computed tomography (CT) on-rail system for localized prostate cancer.

Methods and materials

Between 2006 and 2011, 282 consecutive patients with localized prostate cancer were treated with in-room CT-guided 3D-CART. Biochemical failure was defined as a rise of at least 2.0 ng/ml beyond the nadir prostate-specific antigen level. Toxicity was scored according to the National Cancer Institute Common Terminology Criteria for Adverse Events, version 4.0.

Results

A total of 261 patients were analyzed retrospectively (median follow-up: 61.6 months). The median prescribed 3D-CART dose was 82 Gy (2 Gy/fraction, dose range: 78–86 Gy), and 193 of the patients additionally received hormonal therapy. The 5-year overall survival rate was 93.9 %. Among low-, intermediate-, and high-risk patients, 5-year rates of freedom from biochemical failure were 100, 91.5 and 90.3 %, respectively. Rates of grade 2–3 late gastrointestinal and genitourinary toxicities were 2.3 and 11.4 %, respectively. No patient experienced late grade 4 or higher toxicity.

Conclusions

In-room CT-guided 3D-CART was feasible and effective for localized prostate cancer. Treatment outcomes were comparable to those previously reported for intensity-modulated radiotherapy.
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Metadata
Title
Three-dimensional conformal arc radiotherapy using a C-arm linear accelerator with a computed tomography on-rail system for prostate cancer: clinical outcomes
Authors
Atsuhiro Kumabe
Noboru Fukuhara
Takuji Utsunomiya
Takatsugu Kawase
Kunihiro Iwata
Yukinori Okada
Shinya Sutani
Toshio Ohashi
Mototsugu Oya
Naoyuki Shigematsu
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Radiation Oncology / Issue 1/2015
Electronic ISSN: 1748-717X
DOI
https://doi.org/10.1186/s13014-015-0515-4

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