Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence Dosimeter

Overview

Journal J Biomed Phys Eng

Publisher Shiraz University of Medical Sciences

Specialty Biomedical Engineering

Date 2019 Jun 20

PMID 31214523

Citations 3

Authors

M Behmadi

H Gholamhosseinian

M Mohammadi

Sh Naseri

M Momennezhad

Sh Bayani

M T Bahreyni Toossi

Affiliations

Soon will be listed here.

Abstract

Background: Given the importance of scattered and low doses in secondary cancer caused by radiation treatment, the point dose of critical organs, which were not subjected to radiation treatment in breast cancer radiotherapy, was measured.

Objective: The purpose of this study is to evaluate the peripheral dose in two techniques of breast cancer radiotherapy with two energies.

Material And Methods: Eight different plans in two techniques (conventional and conformal) and two photon energies (6 and 15 MeV) were applied to Rando Alderson Phantom's DICOM images. Nine organs were contoured in the treatment planning system and specified on the phantom. To measure the photon dose, forty-eight thermoluminescence dosimeters (MTS700) were positioned in special places on the above nine organs and plans were applied to Rando phantom with Elekta presice linac. To obtain approximately the same dose distribution in the clinical organ volume, a wedge was used on planes with an energy of 6 MeV photon.

Results: Point doses in critical organs with 8 different plans demonstrated that scattering in low-energy photon is greater than high-energy photon. In contrast, neutron contamination in high-energy photon is not negligible. Using the wedge and shield impose greater scattering and neutron contamination on patients with low-and high-energy photon, respectively.

Conclusion: Deciding on techniques and energies required for preparing an acceptable treatment plan in terms of scattering and neutron contamination is a key issue that may affect the probability of secondary cancer in a patient.

Citing Articles

Calculation of Organ Dose Distribution (in-field and Out-of-field) in Breast Cancer Radiotherapy on RANDO Phantom Using GEANT4 Application for Tomographic Emission (Gate) Monte Carlo Simulation.

Behmadi M, Toossi M, Nasseri S, Ravari M, Momennezhad M, Gholamhosseinian H J Med Signals Sens. 2024; 14:18.

PMID: 39100743 PMC: 11296572. DOI: 10.4103/jmss.jmss_25_23.

Dosimetry Evaluation of Treatment Planning Systems in Patient-Specific 3D Printed Anthropomorphic Phantom for Breast Cancer after Mastectomy using a Single-Beam 3D-CRT Technique for Megavoltage Electron Radiation Therapy.

Endarko E, Aisyah S, Hariyanto A, Haekal M, Kavilani N, Syafii A J Biomed Phys Eng. 2023; 13(3):217-226.

PMID: 37312896 PMC: 10258204. DOI: 10.31661/jbpe.v0i0.2111-1428.

Comparison of Breast Cancer Radiotherapy Techniques Regarding Secondary Cancer Risk and Normal Tissue Complication Probability - Modelling and Measurements Using a 3D-Printed Phantom.

Vogel M, Gade J, Timm B, Schurmann M, Auerbach H, Nusken F Front Oncol. 2022; 12:892923.

PMID: 35965556 PMC: 9365503. DOI: 10.3389/fonc.2022.892923.

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