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- W3209300321 abstract "Purpose: This study aims to evaluate the treatment plans of Volumetric-modulated arc therapy (VMAT)and intensity-modulated radiation therapy (IMRT) techniques for cervical-thoracic esophageal cancers. Methods and Materials: Sixty patients were retrospectively identified.Several parameters were evaluated based on target conformity anddose-volume histograms of organs at risk (lung, spinal cord, and heart). Aphantom for time comparison was also assessed for each plan. Results: The IMRT plans (5f-IMRT: V95% = 99.4 ±0.3, 7f-IMRT: V95% = 99.8 ± 0.1) results in better PTV coverage than RA plans(Single-arc: V95% = 95.8 ± 3.2, Double-arc: V95% = 95.4 ± 2.3). The target doseconformity of the 5f-IMRT plan was inferior to all plans (CI = 70.4 ± 7.1). TheSingle-arc plan achieved the best conformity (CI = 72.5 ± 4.6), whereas theDouble-arc plan (CI = 72.1 ± 5.1) was slightly inferior to the Single-arc planbut superior to the 7f-IMRT plan (CI = 71.7 ± 8.6). The total MU was reduced by 42.1% in VMAT plan. The average MUneeded to deliver the dose of 60 Gy for Single-arc (423.5 ± 52.1 MU) was foundto be the least. Similarly, the average MU for the 5f-IMRT, 7f-IMRT andDouble-arc were 868.2 ± 182.0 MU, 870.0 ± 225.3 MU and 548.8 ± 47.2 MU,respectively. The delivery time in VMAT plans was reducedfrom 193.8 seconds to 99.2 seconds byaround 48.8% compared to IMRT plans. Conclusion: For similar PTV parameters, VMAT delivers alower dose to organs at risk than IMRT in a shorter time, and this haswarranted clinical implementation." @default.
- W3209300321 created "2021-11-08" @default.
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- W3209300321 date "2021-01-01" @default.
- W3209300321 modified "2023-09-29" @default.
- W3209300321 title "Dosimetric and Efficiency Comparisons between Volumetric Modulated Arc Therapy and IMRT for Cervical-Thoracic Esophageal Cancers" @default.
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- W3209300321 doi "https://doi.org/10.4236/jct.2021.1211051" @default.
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