Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative Study
Introduction: Treatment of pelvic bone metastases using a Halcyon machine, mostly presents some difficulties to plan, especially for big volumes because of the machine field size. The purpose of this study is to use two lateral isocenters in the treatment of pelvic bone metastases with the Halcyon m...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Mashhad University of Medical Sciences
2024-07-01
|
| Series: | Iranian Journal of Medical Physics |
| Subjects: | |
| Online Access: | https://ijmp.mums.ac.ir/article_22716_cc6d28d0e3649b615454fe4273955a70.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832595686771654656 |
|---|---|
| author | Morad Erraoudi Kaoutar El Bouchiti Yassine Herrassi mohamed El ghalmi Yassir Raoui Youssef Bouzekraoui FARIDA BENTAYEB Lalla Btissam Drissi |
| author_facet | Morad Erraoudi Kaoutar El Bouchiti Yassine Herrassi mohamed El ghalmi Yassir Raoui Youssef Bouzekraoui FARIDA BENTAYEB Lalla Btissam Drissi |
| author_sort | Morad Erraoudi |
| collection | DOAJ |
| description | Introduction: Treatment of pelvic bone metastases using a Halcyon machine, mostly presents some difficulties to plan, especially for big volumes because of the machine field size. The purpose of this study is to use two lateral isocenters in the treatment of pelvic bone metastases with the Halcyon machine, in order to overcome its limitations in treating large volumes.Material and Methods: We report a retrospective study of 8 patients who received radiotherapy for pelvic bone metastases, all treated by two different VMAT techniques. The first technique was performed by two longitudinal isocenters (LONI) and the second by two lateral isocenters (LATI) respecting the authorized distance longitudinally between two isocenters which must be less than 8 cm. For each isocenter, two opposite arcs are used for all treated patients.Results: The plans conformity index (CI) assessment shows no difference between the two used techniques for all the treated patients. Remarkable coverage of PTVs was obtained in lateral isocenter (LATI) with 96.2% compared to 94%.6% for LONI, as well as the maximum dose which was 109.4% for LATI versus 112.3% for LONI. However, the Conformation number (CN) that takes into account both healthy tissue and organ at risk protection was improved by 7.3% by using LATI.Conclusion: A very satisfactory result has been obtained in the treatment of pelvic bone metastases with LATI. With this technique, we can exceed the limits of the Halcyon machine and process larger volumes. |
| format | Article |
| id | doaj-art-6749f78d45a543f398f4e282fa8ec98a |
| institution | Kabale University |
| issn | 2345-3672 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Mashhad University of Medical Sciences |
| record_format | Article |
| series | Iranian Journal of Medical Physics |
| spelling | doaj-art-6749f78d45a543f398f4e282fa8ec98a2025-01-18T07:32:32ZengMashhad University of Medical SciencesIranian Journal of Medical Physics2345-36722024-07-0121422823610.22038/ijmp.2023.70105.223422716Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative StudyMorad Erraoudi0Kaoutar El Bouchiti1Yassine Herrassi2mohamed El ghalmi3Yassir Raoui4Youssef Bouzekraoui5FARIDA BENTAYEB6Lalla Btissam Drissi7Department of physics, Faculty of sciences, University Mohammed V in Rabat, MoroccoMohammed VI University of Health Sciences, Casablanca, MoroccoIba Dosimetry Schwarzenbruck, GermanyFaculty of Sciences, LPHE-M&S, Mohammed V University, RabatUniversité Mohammed V de RabatHassan First University of Settat, High Institute of Health Sciences, Laboratory of Sciences and Health Technologies, Settat, MoroccoDepartement of Physics, Laboratory of High Energy Physics, Modelling and Simulation, Faculty of Science, Mohammed V Agdal University, Rabat, Kingdom of Morocco1Department of physics, Faculty of sciences, University Mohammed V in Rabat, MoroccoIntroduction: Treatment of pelvic bone metastases using a Halcyon machine, mostly presents some difficulties to plan, especially for big volumes because of the machine field size. The purpose of this study is to use two lateral isocenters in the treatment of pelvic bone metastases with the Halcyon machine, in order to overcome its limitations in treating large volumes.Material and Methods: We report a retrospective study of 8 patients who received radiotherapy for pelvic bone metastases, all treated by two different VMAT techniques. The first technique was performed by two longitudinal isocenters (LONI) and the second by two lateral isocenters (LATI) respecting the authorized distance longitudinally between two isocenters which must be less than 8 cm. For each isocenter, two opposite arcs are used for all treated patients.Results: The plans conformity index (CI) assessment shows no difference between the two used techniques for all the treated patients. Remarkable coverage of PTVs was obtained in lateral isocenter (LATI) with 96.2% compared to 94%.6% for LONI, as well as the maximum dose which was 109.4% for LATI versus 112.3% for LONI. However, the Conformation number (CN) that takes into account both healthy tissue and organ at risk protection was improved by 7.3% by using LATI.Conclusion: A very satisfactory result has been obtained in the treatment of pelvic bone metastases with LATI. With this technique, we can exceed the limits of the Halcyon machine and process larger volumes.https://ijmp.mums.ac.ir/article_22716_cc6d28d0e3649b615454fe4273955a70.pdfvmatpelvicradiotherapyptvhalcyon machine |
| spellingShingle | Morad Erraoudi Kaoutar El Bouchiti Yassine Herrassi mohamed El ghalmi Yassir Raoui Youssef Bouzekraoui FARIDA BENTAYEB Lalla Btissam Drissi Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative Study Iranian Journal of Medical Physics vmat pelvic radiotherapy ptv halcyon machine |
| title | Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative Study |
| title_full | Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative Study |
| title_fullStr | Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative Study |
| title_full_unstemmed | Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative Study |
| title_short | Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative Study |
| title_sort | solution for processing pelvic bone metastases with halcyon tm 2 0 on lateral and longitudinal isocenters treatment plans using the vmat technique a comparative study |
| topic | vmat pelvic radiotherapy ptv halcyon machine |
| url | https://ijmp.mums.ac.ir/article_22716_cc6d28d0e3649b615454fe4273955a70.pdf |
| work_keys_str_mv | AT moraderraoudi solutionforprocessingpelvicbonemetastaseswithhalcyontm20onlateralandlongitudinalisocenterstreatmentplansusingthevmattechniqueacomparativestudy AT kaoutarelbouchiti solutionforprocessingpelvicbonemetastaseswithhalcyontm20onlateralandlongitudinalisocenterstreatmentplansusingthevmattechniqueacomparativestudy AT yassineherrassi solutionforprocessingpelvicbonemetastaseswithhalcyontm20onlateralandlongitudinalisocenterstreatmentplansusingthevmattechniqueacomparativestudy AT mohamedelghalmi solutionforprocessingpelvicbonemetastaseswithhalcyontm20onlateralandlongitudinalisocenterstreatmentplansusingthevmattechniqueacomparativestudy AT yassirraoui solutionforprocessingpelvicbonemetastaseswithhalcyontm20onlateralandlongitudinalisocenterstreatmentplansusingthevmattechniqueacomparativestudy AT youssefbouzekraoui solutionforprocessingpelvicbonemetastaseswithhalcyontm20onlateralandlongitudinalisocenterstreatmentplansusingthevmattechniqueacomparativestudy AT faridabentayeb solutionforprocessingpelvicbonemetastaseswithhalcyontm20onlateralandlongitudinalisocenterstreatmentplansusingthevmattechniqueacomparativestudy AT lallabtissamdrissi solutionforprocessingpelvicbonemetastaseswithhalcyontm20onlateralandlongitudinalisocenterstreatmentplansusingthevmattechniqueacomparativestudy |