Natalia Tejedor-Aguilar, Françoise Lliso, Juan C Ruiz-Rodríguez, Jose Gimeno-Olmos, Vicente Carmona, Jorge Bonaque, Juan A Bautista, Jose Perez-Calatayud
{"title":"应用开放式固定面罩对HyperArc治疗多发性脑转移瘤的评价。","authors":"Natalia Tejedor-Aguilar, Françoise Lliso, Juan C Ruiz-Rodríguez, Jose Gimeno-Olmos, Vicente Carmona, Jorge Bonaque, Juan A Bautista, Jose Perez-Calatayud","doi":"","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>In the implementation of the use of Encompass<sup>TM</sup> partially open immobilization mask to perform SRS of multiple brain metastasis, the evaluation of patient's intrafraction motion (IM) is deemed convenient to verify that the margins applied to the GTV are able to ensure adequate dose coverage to each lesion.</p><p><strong>Methods: </strong>IM was determined by comparing the pre- and post-treatment CBCT images with respect to the simulation CT for a total of 23 fractions. The dosimetric impact on GTV coverage due to translational errors in patient positioning and rotational uncertainties of LINAC's performance was also evaluated.</p><p><strong>Results: </strong>The absolute magnitude of IM was less than 1 mm in all cases. The dosimetric difference on GTV coverage due to patient's IM was inferior to 5%. There was not found any significant correlation between the dosimetric impact of rotational uncertainties with the distance to the isocenter.</p><p><strong>Conclusion: </strong>The margins applied to the GTV are adequate when using Encompass<sup>TM</sup> immobilization device.</p>","PeriodicalId":16917,"journal":{"name":"Journal of radiosurgery and SBRT","volume":"8 4","pages":"283-290"},"PeriodicalIF":0.7000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10322167/pdf/rsbrt-8-283.pdf","citationCount":"0","resultStr":"{\"title\":\"Evaluation of intrafraction motion with an open immobilization mask for HyperArc treatment of multiple brain metastases.\",\"authors\":\"Natalia Tejedor-Aguilar, Françoise Lliso, Juan C Ruiz-Rodríguez, Jose Gimeno-Olmos, Vicente Carmona, Jorge Bonaque, Juan A Bautista, Jose Perez-Calatayud\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>In the implementation of the use of Encompass<sup>TM</sup> partially open immobilization mask to perform SRS of multiple brain metastasis, the evaluation of patient's intrafraction motion (IM) is deemed convenient to verify that the margins applied to the GTV are able to ensure adequate dose coverage to each lesion.</p><p><strong>Methods: </strong>IM was determined by comparing the pre- and post-treatment CBCT images with respect to the simulation CT for a total of 23 fractions. The dosimetric impact on GTV coverage due to translational errors in patient positioning and rotational uncertainties of LINAC's performance was also evaluated.</p><p><strong>Results: </strong>The absolute magnitude of IM was less than 1 mm in all cases. The dosimetric difference on GTV coverage due to patient's IM was inferior to 5%. There was not found any significant correlation between the dosimetric impact of rotational uncertainties with the distance to the isocenter.</p><p><strong>Conclusion: </strong>The margins applied to the GTV are adequate when using Encompass<sup>TM</sup> immobilization device.</p>\",\"PeriodicalId\":16917,\"journal\":{\"name\":\"Journal of radiosurgery and SBRT\",\"volume\":\"8 4\",\"pages\":\"283-290\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2022-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10322167/pdf/rsbrt-8-283.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of radiosurgery and SBRT\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"SURGERY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of radiosurgery and SBRT","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"SURGERY","Score":null,"Total":0}
Evaluation of intrafraction motion with an open immobilization mask for HyperArc treatment of multiple brain metastases.
Purpose: In the implementation of the use of EncompassTM partially open immobilization mask to perform SRS of multiple brain metastasis, the evaluation of patient's intrafraction motion (IM) is deemed convenient to verify that the margins applied to the GTV are able to ensure adequate dose coverage to each lesion.
Methods: IM was determined by comparing the pre- and post-treatment CBCT images with respect to the simulation CT for a total of 23 fractions. The dosimetric impact on GTV coverage due to translational errors in patient positioning and rotational uncertainties of LINAC's performance was also evaluated.
Results: The absolute magnitude of IM was less than 1 mm in all cases. The dosimetric difference on GTV coverage due to patient's IM was inferior to 5%. There was not found any significant correlation between the dosimetric impact of rotational uncertainties with the distance to the isocenter.
Conclusion: The margins applied to the GTV are adequate when using EncompassTM immobilization device.
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