Dosimetric comparison of modern radiotherapy techniques for gastric cancer after total gastrectomy

Purpose: The purpose of this study is to investigate the optimal radiotherapy technique for postoperative irradiation of gastric cancer treated with total gastrectomy. Materials and Methods: The database of ten patients was used for this study. Three-dimensional (3D) conformal radiotherapy, intensit...

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Veröffentlicht in:Journal of cancer research and therapeutics 2020-12, Vol.16 (Supplement), p.S133-S137
Hauptverfasser: Altinok, Pelin, Tekce, Ertugrul, Karakose, Fatih, Berk, Kemal, Kalafat, UEmmuehan, Kiziltan, Huriye Senay, Akgun, Zueleyha, Mayadagli, Alpaslan
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container_end_page S137
container_issue Supplement
container_start_page S133
container_title Journal of cancer research and therapeutics
container_volume 16
creator Altinok, Pelin
Tekce, Ertugrul
Karakose, Fatih
Berk, Kemal
Kalafat, UEmmuehan
Kiziltan, Huriye Senay
Akgun, Zueleyha
Mayadagli, Alpaslan
description Purpose: The purpose of this study is to investigate the optimal radiotherapy technique for postoperative irradiation of gastric cancer treated with total gastrectomy. Materials and Methods: The database of ten patients was used for this study. Three-dimensional (3D) conformal radiotherapy, intensity-modulated therapy (IMRT), volumetric modulated arc therapy (VMAT), and helical tomotherapy (HT) plans were created for each dataset. The prescription dose was 45 Gy in 25 fractions. Comparative analyses of the target volume coverage and the doses of organs at risk were performed. Results: HT was significantly provided more homogeneity. The best conformal plans were achieved with VMAT. Both kidneys were better preserved with HT and VMAT. HT significantly lowered the V13 of the left kidney and VMAT significantly lowered V20. However, the mean left kidney doses were not statistically different. The lowest liver V30 was obtained with VMAT but not with statistically different than IMRT and HT. Mean liver doses were statistically inferior with 3D. The worst spinal cord doses were seen with 3D. The integral dose of the body did not differ among the techniques. Conclusion: In comparison of the four techniques, 3D seems to be the most unsuitable method regarding sparing the normal tissues. According to availability, HT and VMAT should be primarily preferred. IMRT can also be used with carefully paying attention to the clinical condition of the patient.
doi_str_mv 10.4103/jcrt.JCRT_548_18
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Materials and Methods: The database of ten patients was used for this study. Three-dimensional (3D) conformal radiotherapy, intensity-modulated therapy (IMRT), volumetric modulated arc therapy (VMAT), and helical tomotherapy (HT) plans were created for each dataset. The prescription dose was 45 Gy in 25 fractions. Comparative analyses of the target volume coverage and the doses of organs at risk were performed. Results: HT was significantly provided more homogeneity. The best conformal plans were achieved with VMAT. Both kidneys were better preserved with HT and VMAT. HT significantly lowered the V13 of the left kidney and VMAT significantly lowered V20. However, the mean left kidney doses were not statistically different. The lowest liver V30 was obtained with VMAT but not with statistically different than IMRT and HT. Mean liver doses were statistically inferior with 3D. The worst spinal cord doses were seen with 3D. The integral dose of the body did not differ among the techniques. 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IMRT can also be used with carefully paying attention to the clinical condition of the patient.</description><identifier>ISSN: 0973-1482</identifier><identifier>EISSN: 1998-4138</identifier><identifier>DOI: 10.4103/jcrt.JCRT_548_18</identifier><identifier>PMID: 33380667</identifier><language>eng</language><publisher>MUMBAI: Wolters Kluwer Medknow Publications</publisher><subject>Care and treatment ; Dosimetry ; Gastrectomy ; Gastrectomy - methods ; Gastric cancer ; Gastrointestinal surgery ; Humans ; Kidneys ; Life Sciences &amp; Biomedicine ; Methods ; Oncology ; Organs at Risk - radiation effects ; Patient outcomes ; Postoperative care ; Prognosis ; Radiation therapy ; Radiotherapy ; Radiotherapy Dosage ; Radiotherapy Planning, Computer-Assisted - methods ; Radiotherapy, Conformal - methods ; Radiotherapy, Intensity-Modulated - methods ; Science &amp; Technology ; Stomach cancer ; Stomach Neoplasms - pathology ; Stomach Neoplasms - radiotherapy ; Stomach Neoplasms - surgery</subject><ispartof>Journal of cancer research and therapeutics, 2020-12, Vol.16 (Supplement), p.S133-S137</ispartof><rights>COPYRIGHT 2020 Medknow Publications and Media Pvt. 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subjects Care and treatment
Dosimetry
Gastrectomy
Gastrectomy - methods
Gastric cancer
Gastrointestinal surgery
Humans
Kidneys
Life Sciences & Biomedicine
Methods
Oncology
Organs at Risk - radiation effects
Patient outcomes
Postoperative care
Prognosis
Radiation therapy
Radiotherapy
Radiotherapy Dosage
Radiotherapy Planning, Computer-Assisted - methods
Radiotherapy, Conformal - methods
Radiotherapy, Intensity-Modulated - methods
Science & Technology
Stomach cancer
Stomach Neoplasms - pathology
Stomach Neoplasms - radiotherapy
Stomach Neoplasms - surgery
title Dosimetric comparison of modern radiotherapy techniques for gastric cancer after total gastrectomy
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