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2010 | 16 | 1 | 23-34
Tytuł artykułu

Treatment planning system and dose delivery accuracy in extracranial stereotactic radiotherapy using Elekta body frame

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The purpose of this study was to measure the photon beam transmission through the Elekta Stereotactic Body Frame (ESBF) and treatment couch, to determine the dose calculations accuracy of the MasterPlan Treatment Planning System (TPS) using Pencil Beam (PBA) and Collapsed Cone (CCA) algorithms during the use of Elekta Stereotactic Body Frame (ESBF), and to demonstrate a simple calculation method to put this transmission into account during the treatment planning dose calculations.The dose was measured at the center of an in-house custom-built inhomogeneous PMMA thorax phantom with and without ‘the frame + treatment couch’. The phantom was CT-imaged inside the ESBF and planned with multiple 3D-CRT fields using PBA and CCA for photon beams of energies 6 MV and 10 MV. There were two treatment plans for dose calculations. In the first plan, the ‘frame + couch’ were included in the body contour and, therefore, included in the TPS dose calculations. In the second plan, the ‘frame + couch’ were not included in the body contour and, therefore, not included in the calculations. Transmission of the ‘frame + couch’ was determined by the ratio of the dose measurements with the ‘frame + couch’ to the measurements without them. To validate the accuracy of the calculation model, plans with and without the ‘frame + couch’ surrounding the phantoms were compared with their corresponding measurements.The transmission of the ‘frame + couch’ varies from 90.23-97.54% depending on the energy, field size, the angle of the beams and whether the beams also intercept them. The validation accuracy of the Pencil Beam (PBA) and Collapsed Cone (CCA) algorithms were within 5.33% and 4.04% respectively for the individual measurements for all gantry angles under this study. The results showed that both PBA and CCA algorithms can calculate the dose to the target within 4.25% and 1.95% of the average measured value.The attenuation caused by the ESBF and couch must be accounted into the planning process. For MasterPlan, the ‘frame + couch’ should be contoured and included in all calculations. This can be done easily and accurately.
Słowa kluczowe
Wydawca
Rocznik
Tom
16
Numer
1
Strony
23-34
Opis fizyczny
Daty
wydano
2010-01-01
online
2011-05-05
Twórcy
autor
  • Medizinische Hochschule Hannover, Strahlentherapie und spezielle Onkologie, Carl-Neuberg Str.1, 30625 Hannover, Germany
  • Medizinische Hochschule Hannover, Strahlentherapie und spezielle Onkologie, Carl-Neuberg Str.1, 30625 Hannover, Germany
  • Medizinische Hochschule Hannover, Strahlentherapie und spezielle Onkologie, Carl-Neuberg Str.1, 30625 Hannover, Germany
Bibliografia
  • Bolling T, Konemann S, Ernst I, Willich N. Late Effects of Thoracic Irradiation in Children. Strahlenther Onkol. 2008;184(6):289-295.[WoS]
  • Bolling T, Schuck A, Paulussen M, Dirksen U, Ranft A, Konemann S et al. Whole Lung Irradiation in Patients with Exclusively Pulmonary Metastases of EWING Tumors - Toxicity Analysis and Treatment Results of the EICESS-93 Trial. Strahlenther Onkol. 2008 Apr;184(4):193-197.[WoS]
  • Dorr W, Herrmann T. Second Tumors after Oncologic Treatment. Strahlenther Onkol. 2008 Feb; 184(2):67-72.[WoS]
  • Fuss M, Salter BJ, Rassiah P et al. Repositioning accuracy of a commercially available double-vacuum whole body immobilization system for stereotactic body radiation therapy. Tech Cancer Res Treatment. 2004 Feb;3(1):59-67.
  • Hiraoka M, Matsuo Y, Nagata Y. Stereotactic body radiation therapy (SBRT) for early-stage lung cancer, Cancer Radiotherapie. 2007 Jan-Feb;11(1-2):32-35.[Crossref]
  • Jereczek-Fossa BA, Kowalczyk A, D'Onofrio A, Catalano G, Garibaldi C, Boboc G et al. Three-Dimensional Corformal or Stereotactic Reirradiation of Recurrent, Metastatic or New Primary Tumors - Analysis of 108 Patients. Strahlenther Onkol. 2008 Jan;184(1):36-40.[WoS]
  • Lax I, Panettieri V, Wennberg B et al. Dose distributions in SBRT of lung tumors: Comparison between two different treatment planning algorithms and Monte-Carlo simulation including breathing motions. Acta Oncol. 2006;45(7):978-988.[Crossref][PubMed]
  • Matsuo Y, Takayama K, Nagata Y et al. Interinstitutional variations in planning for stereotactic body radiation therapy for lung cancer. Int J Radiat Oncol Biol Phys. 2007 Jun;68(1):416-425.[PubMed][Crossref][WoS]
  • de Mooy LG. The use of carbon fibers in radiotherapy. Radiother Oncol. 1991;22(2):140-142.[Crossref]
  • Murray B, Forster K, Timmerman R. Frame-based immobilization and targeting for stereotacticbody radiation therapy. Med Dosim. 2007 Summer;32(2):86-91.[WoS][Crossref][PubMed]
  • Polednik M, Abo Madyan Y, Schneider F, Wolff D, Bannach B, Lambrecht U et al. Breast Cancer Working Group (German Cancer Association), Evaluation of Calculation Algorithms Implemented in Different Commercial Planning Systems on an Anthropomorphic Breast Phantom Using Film Dosimetry. Strahlenther Onkol. 2007;183:667-672.
  • Poppe B, Chofor N, Ruhmann A, Kunth W, Djouguela A, Kollhoff R et al. The Effect of a Carbon-Fiber Couch on the Depth-Dose Curves and Transmission Properties for Megavoltage Photon Beams. Strahlenther Onkol. 2007 Jan;183(1):43-48.[WoS]
  • Semrau R, Hansemann K, Adam M, Andratschke N, Brunner T, Heinzelmann F et al. Quality of Training in Radiation Oncology in Germany - Results of a 2006 Survey, Srahlenther Onkol. 2008 May; 184(5):239-244.
  • Richter A, Sweeney R, Baier K, Flentje M, Guckenberger M. Effect of Breathing Motion in Radiotherapy of Breast - 4Dose Calculation an Motion Tracking via EPID. Strahlenther Onkol. 2009 Jul;185(7):425-430.[WoS]
  • Song DY, Kavanagh BD, Benedict SH et al. Stereotactic body radiation therapy: Rationale, techniques, applications, and optimization. Oncology (Huntington). 2004 Oct;18(11):1419-1430.
  • Timmerman R, Galvin J, Michalski J et al. Accreditation and quality assurance for Radiation Therapy Oncology Group: Multicenter clinical trials using stereotactic body radiation therapy in lung cancer. Acta Oncol. 2006;45(7):779-786.[PubMed][Crossref]
  • Timmerman RD, Kavanagh BD, Cho LC et al. Stereotactic body radiation therapy in multiple organ sites. Journal of Clinical Oncology. 2007 Mar 10;25(8):947-952.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_v10013-010-0003-y
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