Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit"

Cheng Xiaolong; Liu Jiping; Shi Jianfang

doi:doi:10.11648/j.ijcems.20190501.14

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Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit"

Cheng Xiaolong, Liu Jiping, Shi Jianfang

Published in International Journal of Clinical and Experimental Medical Sciences (Volume 5, Issue 1)

Received: 17 March 2019 Accepted: 26 April 2019 Published: 15 May 2019

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Abstract

Objective: To perform an annual test on the system stability of the first helical tomotherapy unit (Tomotherapy, TOMO) in Zhejiang province according to WS531-2017 "specification for testing of quality control in helical tomotherapy unit", and to further standardize the quality control operation, understand the properties of the system and ensure the accurate implementation of clinical radiotherapy. Methods: According to the requirements of WS531-2017, 8-channel measurement instrument (TomoElectrometer), ionization chamber A1SL (Standing Imaging, USA) and A17 (Standing Imaging, USA), cylindrical phantom (Cheese Phantom), equivalent rectangular solid water, two-dimensional water tank, EBT3 film, and Vidar film analyzer were used to detect 10 key indicators of TOMO. Results: The static output dose deviation was -0.6%, and the rotational output dose deviation was 1.4%. The difference between radiation quality and planned value was 0.8%. The symmetry of the horizontal dose curve of the radiation field was -1.2%; and the full width at half-maximum deviation of the longitudinal dose curve of the radiation field was 0.7mm. The horizontal offset of multi-leaf collimator was -0.6mm. The green laser offset in axial plane, sagittal plane and coronal plane were 0.08mm, 0.2mm and 0.2mm to the of virtual isocenter. The red laser light offset was -0.4mm. The movement deviation of the treatment bed was 0.3mm; and the synchronous deviation of the rotation of the treatment bed and frame was -0.6mm. Conclusion: All 10 key indicators of TOMO meet the requirement of WS531-2017. Some necessary testing items, such as MVCT image quality verification, should be added to the annual TOMO quality control in order to ensure the good stability and normal working of system.

Published in	International Journal of Clinical and Experimental Medical Sciences (Volume 5, Issue 1)
DOI	10.11648/j.ijcems.20190501.14
Page(s)	14-18
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Helical Tomotherapy Unit, Quality Assurance, Radiotherapy Dose, Deviation

References

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[5]	Ricchetti F, Barra S, Agostinelli S, et al. Feasibility of helical tomotherapy for radical dose retreatment in pelvic area: a report of 4 cases.[J]. Tumori, 2011, 97(4): 492.
[6]	Chen Q, Westerly D, Fang Z, et al. TomoTherapy MLC verification using exit detector data [J]. Medical Physics, 2012, 39(1): 143-151.
[7]	Langen K M, Papanikolaou N, Balog J, et al. QA for helical tomotherapy: Report of the AAPM Task Group 148a [J]. Medical Physics, 2010, 37(9): 4817-4853.
[8]	Jeraj R, Mackie T R, Balog J, et al. Dose calibration of nonconventional treatment systems applied to helical tomotherapy [J]. Medical Physics, 2005, 32(2): 570-577.
[9]	Kapatoes J M, Olivera G H, Ruchala K J, et al. A feasible method for clinical delivery verification and dose reconstruction in tomotherapy [J]. Medical Physics, 2001, 28(4): 528-542.
[10]	Chen Q, Levinson L, Ding K, et al. TomoTherapy Patient QA Using Exit Detector Measurement of Pre-Treatment In-Air Delivery [J]. Medical Physics, 2012, 39(9): 3707-3707.
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[15]	Jeraj R, Mackie T R, Balog J, et al. Radiation characteristics of helical tomotherapy [J]. Medical Physics, 2004, 31(2): 396-403.

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APA Style

Cheng Xiaolong, Liu Jiping, Shi Jianfang. (2019). Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit". International Journal of Clinical and Experimental Medical Sciences, 5(1), 14-18. https://doi.org/10.11648/j.ijcems.20190501.14

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ACS Style

Cheng Xiaolong; Liu Jiping; Shi Jianfang. Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit". Int. J. Clin. Exp. Med. Sci. 2019, 5(1), 14-18. doi: 10.11648/j.ijcems.20190501.14

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AMA Style

Cheng Xiaolong, Liu Jiping, Shi Jianfang. Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit". Int J Clin Exp Med Sci. 2019;5(1):14-18. doi: 10.11648/j.ijcems.20190501.14

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@article{10.11648/j.ijcems.20190501.14,
  author = {Cheng Xiaolong and Liu Jiping and Shi Jianfang},
  title = {Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit"},
  journal = {International Journal of Clinical and Experimental Medical Sciences},
  volume = {5},
  number = {1},
  pages = {14-18},
  doi = {10.11648/j.ijcems.20190501.14},
  url = {https://doi.org/10.11648/j.ijcems.20190501.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijcems.20190501.14},
  abstract = {Objective: To perform an annual test on the system stability of the first helical tomotherapy unit (Tomotherapy, TOMO) in Zhejiang province according to WS531-2017 "specification for testing of quality control in helical tomotherapy unit", and to further standardize the quality control operation, understand the properties of the system and ensure the accurate implementation of clinical radiotherapy. Methods: According to the requirements of WS531-2017, 8-channel measurement instrument (TomoElectrometer), ionization chamber A1SL (Standing Imaging, USA) and A17 (Standing Imaging, USA), cylindrical phantom (Cheese Phantom), equivalent rectangular solid water, two-dimensional water tank, EBT3 film, and Vidar film analyzer were used to detect 10 key indicators of TOMO. Results: The static output dose deviation was -0.6%, and the rotational output dose deviation was 1.4%. The difference between radiation quality and planned value was 0.8%. The symmetry of the horizontal dose curve of the radiation field was -1.2%; and the full width at half-maximum deviation of the longitudinal dose curve of the radiation field was 0.7mm. The horizontal offset of multi-leaf collimator was -0.6mm. The green laser offset in axial plane, sagittal plane and coronal plane were 0.08mm, 0.2mm and 0.2mm to the of virtual isocenter. The red laser light offset was -0.4mm. The movement deviation of the treatment bed was 0.3mm; and the synchronous deviation of the rotation of the treatment bed and frame was -0.6mm. Conclusion: All 10 key indicators of TOMO meet the requirement of WS531-2017. Some necessary testing items, such as MVCT image quality verification, should be added to the annual TOMO quality control in order to ensure the good stability and normal working of system.},
 year = {2019}
}

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TY  - JOUR
T1  - Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit"
AU  - Cheng Xiaolong
AU  - Liu Jiping
AU  - Shi Jianfang
Y1  - 2019/05/15
PY  - 2019
N1  - https://doi.org/10.11648/j.ijcems.20190501.14
DO  - 10.11648/j.ijcems.20190501.14
T2  - International Journal of Clinical and Experimental Medical Sciences
JF  - International Journal of Clinical and Experimental Medical Sciences
JO  - International Journal of Clinical and Experimental Medical Sciences
SP  - 14
EP  - 18
PB  - Science Publishing Group
SN  - 2469-8032
UR  - https://doi.org/10.11648/j.ijcems.20190501.14
AB  - Objective: To perform an annual test on the system stability of the first helical tomotherapy unit (Tomotherapy, TOMO) in Zhejiang province according to WS531-2017 "specification for testing of quality control in helical tomotherapy unit", and to further standardize the quality control operation, understand the properties of the system and ensure the accurate implementation of clinical radiotherapy. Methods: According to the requirements of WS531-2017, 8-channel measurement instrument (TomoElectrometer), ionization chamber A1SL (Standing Imaging, USA) and A17 (Standing Imaging, USA), cylindrical phantom (Cheese Phantom), equivalent rectangular solid water, two-dimensional water tank, EBT3 film, and Vidar film analyzer were used to detect 10 key indicators of TOMO. Results: The static output dose deviation was -0.6%, and the rotational output dose deviation was 1.4%. The difference between radiation quality and planned value was 0.8%. The symmetry of the horizontal dose curve of the radiation field was -1.2%; and the full width at half-maximum deviation of the longitudinal dose curve of the radiation field was 0.7mm. The horizontal offset of multi-leaf collimator was -0.6mm. The green laser offset in axial plane, sagittal plane and coronal plane were 0.08mm, 0.2mm and 0.2mm to the of virtual isocenter. The red laser light offset was -0.4mm. The movement deviation of the treatment bed was 0.3mm; and the synchronous deviation of the rotation of the treatment bed and frame was -0.6mm. Conclusion: All 10 key indicators of TOMO meet the requirement of WS531-2017. Some necessary testing items, such as MVCT image quality verification, should be added to the annual TOMO quality control in order to ensure the good stability and normal working of system.
VL  - 5
IS  - 1
ER  -

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Author Information

Cheng Xiaolong

Department of Radiation Physics, Zhejiang Cancer Hospital, Hangzhou, China
Liu Jiping

Department of Radiation Physics, Zhejiang Cancer Hospital, Hangzhou, China
Shi Jianfang

Department of Radiation Physics, Zhejiang Cancer Hospital, Hangzhou, China

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Plain Text BibTeX RIS

APA Style

Cheng Xiaolong, Liu Jiping, Shi Jianfang. (2019). Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit". International Journal of Clinical and Experimental Medical Sciences, 5(1), 14-18. https://doi.org/10.11648/j.ijcems.20190501.14

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ACS Style

Cheng Xiaolong; Liu Jiping; Shi Jianfang. Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit". Int. J. Clin. Exp. Med. Sci. 2019, 5(1), 14-18. doi: 10.11648/j.ijcems.20190501.14

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AMA Style

Cheng Xiaolong, Liu Jiping, Shi Jianfang. Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit". Int J Clin Exp Med Sci. 2019;5(1):14-18. doi: 10.11648/j.ijcems.20190501.14

Copy | Download

@article{10.11648/j.ijcems.20190501.14,
  author = {Cheng Xiaolong and Liu Jiping and Shi Jianfang},
  title = {Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit"},
  journal = {International Journal of Clinical and Experimental Medical Sciences},
  volume = {5},
  number = {1},
  pages = {14-18},
  doi = {10.11648/j.ijcems.20190501.14},
  url = {https://doi.org/10.11648/j.ijcems.20190501.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijcems.20190501.14},
  abstract = {Objective: To perform an annual test on the system stability of the first helical tomotherapy unit (Tomotherapy, TOMO) in Zhejiang province according to WS531-2017 "specification for testing of quality control in helical tomotherapy unit", and to further standardize the quality control operation, understand the properties of the system and ensure the accurate implementation of clinical radiotherapy. Methods: According to the requirements of WS531-2017, 8-channel measurement instrument (TomoElectrometer), ionization chamber A1SL (Standing Imaging, USA) and A17 (Standing Imaging, USA), cylindrical phantom (Cheese Phantom), equivalent rectangular solid water, two-dimensional water tank, EBT3 film, and Vidar film analyzer were used to detect 10 key indicators of TOMO. Results: The static output dose deviation was -0.6%, and the rotational output dose deviation was 1.4%. The difference between radiation quality and planned value was 0.8%. The symmetry of the horizontal dose curve of the radiation field was -1.2%; and the full width at half-maximum deviation of the longitudinal dose curve of the radiation field was 0.7mm. The horizontal offset of multi-leaf collimator was -0.6mm. The green laser offset in axial plane, sagittal plane and coronal plane were 0.08mm, 0.2mm and 0.2mm to the of virtual isocenter. The red laser light offset was -0.4mm. The movement deviation of the treatment bed was 0.3mm; and the synchronous deviation of the rotation of the treatment bed and frame was -0.6mm. Conclusion: All 10 key indicators of TOMO meet the requirement of WS531-2017. Some necessary testing items, such as MVCT image quality verification, should be added to the annual TOMO quality control in order to ensure the good stability and normal working of system.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Implementation and Evaluation of WS531-2017 "Specification for Testing of Quality Control in Helical Tomotherapy Unit"
AU  - Cheng Xiaolong
AU  - Liu Jiping
AU  - Shi Jianfang
Y1  - 2019/05/15
PY  - 2019
N1  - https://doi.org/10.11648/j.ijcems.20190501.14
DO  - 10.11648/j.ijcems.20190501.14
T2  - International Journal of Clinical and Experimental Medical Sciences
JF  - International Journal of Clinical and Experimental Medical Sciences
JO  - International Journal of Clinical and Experimental Medical Sciences
SP  - 14
EP  - 18
PB  - Science Publishing Group
SN  - 2469-8032
UR  - https://doi.org/10.11648/j.ijcems.20190501.14
AB  - Objective: To perform an annual test on the system stability of the first helical tomotherapy unit (Tomotherapy, TOMO) in Zhejiang province according to WS531-2017 "specification for testing of quality control in helical tomotherapy unit", and to further standardize the quality control operation, understand the properties of the system and ensure the accurate implementation of clinical radiotherapy. Methods: According to the requirements of WS531-2017, 8-channel measurement instrument (TomoElectrometer), ionization chamber A1SL (Standing Imaging, USA) and A17 (Standing Imaging, USA), cylindrical phantom (Cheese Phantom), equivalent rectangular solid water, two-dimensional water tank, EBT3 film, and Vidar film analyzer were used to detect 10 key indicators of TOMO. Results: The static output dose deviation was -0.6%, and the rotational output dose deviation was 1.4%. The difference between radiation quality and planned value was 0.8%. The symmetry of the horizontal dose curve of the radiation field was -1.2%; and the full width at half-maximum deviation of the longitudinal dose curve of the radiation field was 0.7mm. The horizontal offset of multi-leaf collimator was -0.6mm. The green laser offset in axial plane, sagittal plane and coronal plane were 0.08mm, 0.2mm and 0.2mm to the of virtual isocenter. The red laser light offset was -0.4mm. The movement deviation of the treatment bed was 0.3mm; and the synchronous deviation of the rotation of the treatment bed and frame was -0.6mm. Conclusion: All 10 key indicators of TOMO meet the requirement of WS531-2017. Some necessary testing items, such as MVCT image quality verification, should be added to the annual TOMO quality control in order to ensure the good stability and normal working of system.
VL  - 5
IS  - 1
ER  -

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