Dosimetric study of the protection level of the bone marrow in patients with cervical or endometrial cancer for three radiotherapy techniques - 3D CRT, IMRT and VMAT. Study protocol

• Autorzy: Jodda A. , Urbański B. , Piotrowski T. , Malicki J.

Identyfikatory

DOI

10.1515/pjmpe-2016-0003

• Języki publikacji: EN

Abstrakty

EN

Background: The paper shows the methodology of an in-phantom study of the protection level of the bone marrow in patients with cervical or endometrial cancer for three radiotherapy techniques: three-dimensional conformal radiotherapy, intensity modulated radiotherapy, and volumetric modulated arc therapy, preceded by the procedures of image guidance. Methods/Design: The dosimetric evaluation of the doses will be performed in an in-house multi-element anthropomorphic phantom of the female pelvic area created by three-dimensional printing technology. The volume and position of the structures will be regulated according to the guidelines from the Bayesian network. The input data for the learning procedure of the model will be obtained from the retrospective analysis of imaging data obtained for 96 patients with endometrial cancer or cervical cancer treated with radiotherapy in our centre in 2008-2013. Three anatomical representations of the phantom simulating three independent clinical cases will be chosen. Five alternative treatment plans (1 × three-dimensional conformal radiotherapy, 2 × intensity modulated radiotherapy and 2 × volumetric modulated arc therapy) will be created for each representation. To simulate image-guided radiotherapy, ten specific recombinations will be designated, for each anatomical representation separately, reflecting possible changes in the volume and position of the phantom components. Discussion: The comparative analysis of planned measurements will identify discrepancies between calculated doses and doses that were measured in the phantom. Finally, differences between the doses cumulated in the hip plates performed by different techniques simulating the gynaecological patients' irradiation of dose delivery will be established. The results of this study will form the basis of the prospective clinical trial that will be designed for the assessment of hematologic toxicity and its correlation with the doses cumulated in the hip plates, for gynaecologic patients undergoing radiation therapy.

Słowa kluczowe

EN

gynaecological cancer; hematologic toxicity; radiotherapy; 3D printing; Bayesian networks; deformable image registration

• Wydawca: Polskie Towarzystwo Fizyki Medycznej
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2016
• Tom: Vol. 22, Iss. 1
• Strony: 11--15
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Jodda A.

• Department of Medical Physics, Greater Poland Cancer Centre, Poznan, Poland

autor

Urbański B.

• Department of Radiotherapy and Gynecological Oncology, Greater Poland Cancer Centre, Poznan, Poland

autor

Piotrowski T.

• Department of Medical Physics, Greater Poland Cancer Centre, Poznan, Poland
• Department of Electroradiology, University of Medical Sciences, Poznan, Poland

autor

Malicki J.

• Department of Medical Physics, Greater Poland Cancer Centre, Poznan, Poland
• Department of Electroradiology, University of Medical Sciences, Poznan, Poland

Bibliografia

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