ArticleRadiation oncology (London, England)2019
Feasibility of hybrid TomoHelical- and TomoDirect-based volumetric gradient matching technique for total body irradiation.
Article in Radiation oncology (London, England), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Dosimetric impact of port number in TomoDirect-based lower-body total body irradiation.Journal of applied clinical medical physics · 2026Article
- A novel AP/PA total body irradiation technique using abutting IMRT fields at extended SSD.Journal of applied clinical medical physics · 2024Article
- Hybrid Tomo-Helical and Tomo-Direct radiotherapy for localized prostate cancer.Journal of applied clinical medical physics · 2021Article
- Total body irradiation of bone marrow transplant using helical TomoTherapy with a focus on the quality of dose contribution at junction target volumes.Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 2021Article
- The effects of rotational setup errors in total body irradiation using helical tomotherapy.Journal of applied clinical medical physics · 2021Article
- Total marrow and lymphoid irradiation with helical tomotherapy: a practical implementation report.Radiation oncology journal · 2020Article
- Intensity-modulated radiation therapy for multiple targets with tomotherapy using multiple sets of static ports from different angles.Journal of applied clinical medical physics · 2020Article
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10 authors.
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Abstract
backgroundTomotherapy-based total body irradiation (TBI) is performed using the head-first position (HFP) and feet-first position (FFP) due to treatment length exceeding the 135 cm limit. To reduce the dosimetric variation at the match lines, we propose and verify a volumetric gradient matching technique (VGMT) by combining TomoHelical (TH) and TomoDirect (TD) modes.
methodsTwo planning CT image sets were acquired with HFP and FFP using 15 × 55 × 18 cm
resultsThe TH&TD plan produced a linear gradient in junction volume, comparable to that of the TH&TH plan. D5 of the PTV was 110% of the prescribed dose when the FFP plan was shifted 0.7 cm and 1.2 cm in the superior direction for 5-GVs and 7-GVs. D95 of the PTV decreased to < 90% of the prescribed dose when the FF plan was shifted 1.1 cm and 1.3 cm in the inferior direction for 5-GVs and 7-GVs. The absolute measured dose showed a good correlation with the calculated dose in the gradient junction volume. The average percent difference (±SD) in all measured points was - 0.7 ± 1.6%, and the average dose variations between depths was - 0.18 ± 1.07%.
conclusionVGMT can create a linear dose gradient across the junction area in both TH&TH and TH&TD and can minimize the dose sensitivity to longitudinal setup errors in tomotherapy-based TBI.
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