Toward enhanced quality assurance guidelines for deep hyperthermia devices: a multi-institution study
Introduction Hyperthermia efficacy depends on the temperatures achieved in the target area. Therefore, hyperthermia systems must deliver both controlled and conformal heating. This study presents a comprehensive multi-institutional quality assurance (QA) evaluation of deep hyperthermia devices.Metho...
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Taylor & Francis Group
2024-12-01
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| Series: | International Journal of Hyperthermia |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/02656736.2024.2436005 |
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| author | Mattia De Lazzari Carolina Carrapiço-Seabra Dietmar Marder Gerard C. van Rhoon Sergio Curto Hana Dobšíček Trefná |
| author_facet | Mattia De Lazzari Carolina Carrapiço-Seabra Dietmar Marder Gerard C. van Rhoon Sergio Curto Hana Dobšíček Trefná |
| author_sort | Mattia De Lazzari |
| collection | DOAJ |
| description | Introduction Hyperthermia efficacy depends on the temperatures achieved in the target area. Therefore, hyperthermia systems must deliver both controlled and conformal heating. This study presents a comprehensive multi-institutional quality assurance (QA) evaluation of deep hyperthermia devices.Methods Six European institutions equipped with BSD- Sigma 60 and Sigma Eye deep hyperthermia applicators participated in the study. Up to six measurements per applicator were performed in each institution. The thermal distribution in cylindrical homogeneous phantoms after 10 minutes of heating with a total power delivered of 1000 watts was assessed using the applicator’s integrated mapping thermometry system. Evaluated quality parameters included temperature increase, focus location, and focus symmetry.Results A total of 54 measurements were conducted, with 43 included in the analysis. All applicators, except one, achieved a temperature increase of 6 °C in 10 minutes. Central heating capabilities were demonstrated, with mean deviations from the intended location of −1.4 ± 1.6 cm for Sigma 60 and 1.5 ± 1.4 cm for Sigma Eye. Symmetry evaluations showed differences in radial temperature profiles of 6.2 ± 4.5 % for the Sigma 60 and 5.9 ± 4.4 % for the Sigma Eye. We propose minimum acceptable values for each quality parameter based on these results.Conclusion The measurements were reproducible with acceptable values for the various quality parameters. Potential deviations might be attributed to inaccuracies in the mapping thermometry system rather than the heating system. The presented protocol and practical recommendations should be applied for future QA measurements in deep hyperthermia. |
| format | Article |
| id | doaj-art-4187938f8dbc4177a7ca21c72f1aeee9 |
| institution | Kabale University |
| issn | 0265-6736 1464-5157 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | International Journal of Hyperthermia |
| spelling | doaj-art-4187938f8dbc4177a7ca21c72f1aeee92025-01-03T09:30:27ZengTaylor & Francis GroupInternational Journal of Hyperthermia0265-67361464-51572024-12-0141110.1080/02656736.2024.2436005Toward enhanced quality assurance guidelines for deep hyperthermia devices: a multi-institution studyMattia De Lazzari0Carolina Carrapiço-Seabra1Dietmar Marder2Gerard C. van Rhoon3Sergio Curto4Hana Dobšíček Trefná5Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, SwedenDepartment of Radiotherapy, Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, The NetherlandsCenter for Radiation Oncology KSA-KSB, Cantonal Hospital Aarau, Aarau, SwitzerlandDepartment of Radiotherapy, Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, The NetherlandsDepartment of Radiotherapy, Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, The NetherlandsDepartment of Electrical Engineering, Chalmers University of Technology, Gothenburg, SwedenIntroduction Hyperthermia efficacy depends on the temperatures achieved in the target area. Therefore, hyperthermia systems must deliver both controlled and conformal heating. This study presents a comprehensive multi-institutional quality assurance (QA) evaluation of deep hyperthermia devices.Methods Six European institutions equipped with BSD- Sigma 60 and Sigma Eye deep hyperthermia applicators participated in the study. Up to six measurements per applicator were performed in each institution. The thermal distribution in cylindrical homogeneous phantoms after 10 minutes of heating with a total power delivered of 1000 watts was assessed using the applicator’s integrated mapping thermometry system. Evaluated quality parameters included temperature increase, focus location, and focus symmetry.Results A total of 54 measurements were conducted, with 43 included in the analysis. All applicators, except one, achieved a temperature increase of 6 °C in 10 minutes. Central heating capabilities were demonstrated, with mean deviations from the intended location of −1.4 ± 1.6 cm for Sigma 60 and 1.5 ± 1.4 cm for Sigma Eye. Symmetry evaluations showed differences in radial temperature profiles of 6.2 ± 4.5 % for the Sigma 60 and 5.9 ± 4.4 % for the Sigma Eye. We propose minimum acceptable values for each quality parameter based on these results.Conclusion The measurements were reproducible with acceptable values for the various quality parameters. Potential deviations might be attributed to inaccuracies in the mapping thermometry system rather than the heating system. The presented protocol and practical recommendations should be applied for future QA measurements in deep hyperthermia.https://www.tandfonline.com/doi/10.1080/02656736.2024.2436005Hyperthermiaquality assurancedeep hyperthermia applicatorshomogeneous phantommeasurement protocol |
| spellingShingle | Mattia De Lazzari Carolina Carrapiço-Seabra Dietmar Marder Gerard C. van Rhoon Sergio Curto Hana Dobšíček Trefná Toward enhanced quality assurance guidelines for deep hyperthermia devices: a multi-institution study International Journal of Hyperthermia Hyperthermia quality assurance deep hyperthermia applicators homogeneous phantom measurement protocol |
| title | Toward enhanced quality assurance guidelines for deep hyperthermia devices: a multi-institution study |
| title_full | Toward enhanced quality assurance guidelines for deep hyperthermia devices: a multi-institution study |
| title_fullStr | Toward enhanced quality assurance guidelines for deep hyperthermia devices: a multi-institution study |
| title_full_unstemmed | Toward enhanced quality assurance guidelines for deep hyperthermia devices: a multi-institution study |
| title_short | Toward enhanced quality assurance guidelines for deep hyperthermia devices: a multi-institution study |
| title_sort | toward enhanced quality assurance guidelines for deep hyperthermia devices a multi institution study |
| topic | Hyperthermia quality assurance deep hyperthermia applicators homogeneous phantom measurement protocol |
| url | https://www.tandfonline.com/doi/10.1080/02656736.2024.2436005 |
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