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He P, Mori S, Ono T, Nomoto A, Ishikawa H. Impact of varying the number of irradiation fields on dose distribution: A four-dimensional scanned carbon-ion lung radiotherapy. Radiat Phys Chem Oxf Engl 1993 2023; 212:111183. [DOI: 10.1016/j.radphyschem.2023.111183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/27/2024]
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Ramesh P, Liu H, Gu W, Sheng K. Fixed Beamline Optimization for Intensity Modulated Carbon-Ion Therapy. IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES 2022; 6:288-293. [PMID: 36092271 PMCID: PMC9457306 DOI: 10.1109/trpms.2021.3092296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A major obstacle for the adoption of heavy ion therapy is the cost and technical difficulties to construct and maintain a rotational gantry. Many heavy ion treatment facilities instead choose to construct fixed beamlines as a compromise, which we propose to mitigate with optimized treatment couch angle. We formulate the integrated beam orientation and scanning spot optimization problem as a quadratic cost function with a group sparsity regularization term. The optimization problem is efficiently solved using fast iterative shrinkage-thresholding algorithm (FISTA). To test the method, we created the fixed beamline plans with couch rotation (FBCR) and without couch rotation (FB) for intensity modulated carbon-ion therapy (IMCT) and compared with the ideal scenario where both the couch and gantry have 360 degrees of freedom (GCR). FB, FBCR, and GCR IMCT plans were compared for ten pancreas cases. The FBCR plans show comparable PTV coverage and OAR doses for each pancreas case. In conclusion, the dosimetric limitation of fixed beams in heavy ion radiotherapy may be largely mitigated with integrated beam orientation optimization of the couch rotation.
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Affiliation(s)
- Pavitra Ramesh
- Physics and Biology in Medicine interdepartmental program, University of California Los Angeles, Los Angeles, CA 90025 USA
| | - Hengjie Liu
- Physics and Biology in Medicine interdepartmental program, University of California Los Angeles, Los Angeles, CA 90025 USA
| | - Wenbo Gu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Ke Sheng
- Physics and Biology in Medicine interdepartmental program, University of California Los Angeles, Los Angeles, CA 90025 USA
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Mori S, Takei Y, Shirai T, Hara Y, Furukawa T, Inaniwa T, Tanimoto K, Tajiri M, Kuroiwa D, Kimura T, Yamamoto N, Yamada S, Tsuji H, Kamada T. Scanned carbon-ion beam therapy throughput over the first 7 years at National Institute of Radiological Sciences. Phys Med 2018; 52:18-26. [PMID: 30139605 DOI: 10.1016/j.ejmp.2018.06.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 05/14/2018] [Accepted: 06/02/2018] [Indexed: 12/31/2022] Open
Abstract
INTRODUCTION In the 7 years since our facility opened, we have treated >2000 patients with pencil-beam scanned carbon-ion beam therapy. METHODS To summarize treatment workflow, we evaluated the following five metrics: i) total number of treated patients; ii) treatment planning time, not including contouring procedure; iii) quality assurance (QA) time (daily and patient-specific); iv) treatment room occupancy time, including patient setup, preparation time, and beam irradiation time; and v) daily treatment hours. These were derived from the oncology information system and patient handling system log files. RESULTS The annual number of treated patients reached 594, 7 years from the facility startup, using two treatment rooms. Mean treatment planning time was 6.0 h (minimum: 3.4 h for prostate, maximum: 9.3 h for esophagus). Mean time devoted to daily QA and patient-specific QA were 22 min and 13.5 min per port, respectively, for the irradiation beam system. Room occupancy time was 14.5 min without gating for the first year, improving to 9.2 min (8.2 min without gating and 12.8 min with gating) in the second. At full capacity, the system ran for 7.5 h per day. CONCLUSIONS We are now capable of treating approximately 600 patients per year in two treatment rooms. Accounting for the staff working time, this performance appears reasonable compared to the other facilities.
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Affiliation(s)
- Shinichiro Mori
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan.
| | - Yuka Takei
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Toshiyuki Shirai
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Yousuke Hara
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Takuji Furukawa
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Taku Inaniwa
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Katsuyuki Tanimoto
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Minoru Tajiri
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Daigo Kuroiwa
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Taku Kimura
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Naoyoshi Yamamoto
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Shigeru Yamada
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Hiroshi Tsuji
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
| | - Tadashi Kamada
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Inage-ku, Chiba 263-0024, Japan
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Sarrut D, Baudier T, Ayadi M, Tanguy R, Rit S. Deformable image registration applied to lung SBRT: Usefulness and limitations. Phys Med 2017; 44:108-112. [PMID: 28947188 DOI: 10.1016/j.ejmp.2017.09.121] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 08/21/2017] [Accepted: 09/09/2017] [Indexed: 11/30/2022] Open
Abstract
Radiation therapy (RT) of the lung requires deformation analysis. Deformable image registration (DIR) is the fundamental method to quantify deformations for various applications: motion compensation, contour propagation, dose accumulation, etc. DIR is therefore unavoidable in lung RT. DIR algorithms have been studied for decades and are now available both within commercial and academic packages. However, they are complex and have limitations that every user must be aware of before clinical implementation. In this paper, the main applications of DIR for lung RT with their associated uncertainties and their limitations are reviewed.
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Affiliation(s)
- David Sarrut
- Univ Lyon, INSA-Lyon, Université Lyon 1, CNRS, Inserm, Centre Léon Bérard, CREATIS UMR 5220, U1206, F-69373 Lyon, France; Univ Lyon, Centre Léon Bérard, F-69373 Lyon, France.
| | - Thomas Baudier
- Univ Lyon, INSA-Lyon, Université Lyon 1, CNRS, Inserm, Centre Léon Bérard, CREATIS UMR 5220, U1206, F-69373 Lyon, France; Univ Lyon, Centre Léon Bérard, F-69373 Lyon, France
| | - Myriam Ayadi
- Univ Lyon, Centre Léon Bérard, F-69373 Lyon, France
| | - Ronan Tanguy
- Univ Lyon, Centre Léon Bérard, F-69373 Lyon, France
| | - Simon Rit
- Univ Lyon, INSA-Lyon, Université Lyon 1, CNRS, Inserm, Centre Léon Bérard, CREATIS UMR 5220, U1206, F-69373 Lyon, France
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