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Technical commissioning of the spot scanning system in Shanghai Proton Therapy Facility

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Abstract

Background

In the field of particle therapy, the method of pencil beam scanning is of great potential for clinical application, now and in the future.

Purpose

The authors made strong effort to develop a spot scanning system for Shanghai Proton Therapy Facility. Design parameters and basic layout of the system are introduced.

Methods

Functionalities and specifications of crucial devices are described in detail. Most of the devices in the system were designed in house by the authors themselves, including scanning nozzle, scanning magnets and their power supplies, beam monitors, irradiation control modules and safety interlock modules. During the technical commissioning stage in the fix beam room, the spot scanning system was tested and verified.

Results

Under conditions of the maximum dose rate and minimum dose rate, a) repeatability of the single spot dose is less than ± 0.1%; b) nonlinearity of the single spot dose is less than ± 0.1%; c) FWHM for spot size in air at isocenter varies from 8mm to 12mm for full energy, consistent with the design values; d) lateral dose distribution achieves a flatness of less than 2% for multiple proton energies.

Conclusion

According to the results of technical commissioning, the spot scanning system is capable of producing a prescribed 3D dose distribution for target tumor successfully.

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Acknowledgements

This work was supported by the Youth Innovation Promotion Association CAS (No. 2016238).

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Authors and Affiliations

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2019 Jialuo Road, Shanghai, 201800, China

    Ming Liu, Haiyang Zhang, Hang Shu, Chongxian Yin, Liying Zhao, Lianhua Ouyang, Rui Li, Songqing Tan, Zhishan Wang, Hanwen Du, Haiqun Zhang, Manzhou Zhang, Kecheng Chu & Xiaolei Dai

  2. Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai, 201210, China

    Ming Liu, Hang Shu, Chongxian Yin, Liying Zhao, Lianhua Ouyang, Rui Li, Songqing Tan, Zhishan Wang, Hanwen Du, Haiqun Zhang, Manzhou Zhang, Kecheng Chu & Xiaolei Dai

  3. Shanghai APACTRON Particle Equipment Co. Ltd., 2019 Jialuo Road, Shanghai, China

    Haiyang Zhang

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  1. Ming Liu
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  2. Haiyang Zhang
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  3. Hang Shu
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  9. Zhishan Wang
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  11. Haiqun Zhang
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  13. Kecheng Chu
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  14. Xiaolei Dai
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Corresponding author

Correspondence to Haiyang Zhang.

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Liu, M., Zhang, H., Shu, H. et al. Technical commissioning of the spot scanning system in Shanghai Proton Therapy Facility. Radiat Detect Technol Methods 4, 46–55 (2020). https://doi.org/10.1007/s41605-019-0148-5

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  • DOI: https://doi.org/10.1007/s41605-019-0148-5

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