alexa Mono-Isocentric Technique in the Breast Cancer and Orga
ISSN: 2155-9619

Journal of Nuclear Medicine & Radiation Therapy
Open Access

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Research Article

Mono-Isocentric Technique in the Breast Cancer and Organ at Risk Tolerance

Assaoui F1*, Toulba A2*, Nouh M2, Lkhouyaali S2, Bensouda Y2, Kebdani T2 and Benjaafar N2

1Medical Physics Unit, Radiotherapy Department, National Institute of Oncology, Rabat, Morocco

2Department of Radiation Oncology, National Institute of Oncology, Rabat, Morocco

Corresponding Authors:
Fatima Assaoui
Medical Physics Unit
Radiotherapy Department, National Institute of Oncology, Rabat, Morocco
E-mail: [email protected]
Ahmedou Toulba
Department of Radiation Oncology
National Institute of Oncology, Rabat, Morocco
E-mail: [email protected]

Received Date: July 24, 2012; Accepted Date: August 25, 2012; Published Date: August 30, 2012

Citation: Assaoui F, Toulba A, Nouh M, Lkhouyaali S, Bensouda Y, et al. (2012) Mono-Isocentric Technique in the Breast Cancer and Organ at Risk Tolerance. J Nucl Med Radiat Ther S2:010. doi:10.4172/2155-9619.S2-010

Copyright: © 2012 Assaoui F, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Purpose: To investigate the impact of the single-isocentre technique on the volumetric dose of lung and heart for adjuvant radiation in breast cancer with regional nodal.

Methods and materials: Thirty patients treated for breast cancer with supraclavicular fossa irradiation; two techniques of treatment TMT (Traditional Matching Technique) and MIT (Mono-Isocentric Technique) are compared, TMT (tangents in SAD and supraclavicular (SCL) in SSD: Source Skin Distance) and MIT (the all fields in SAD: Source Axe Distance) (Chart 1). Techniques were compared according to dose volume histograms (DVHs) analysis in terms of PTV homogeneity and as OARs (Organs at Risk) dose and volume parameters.

Results: The dose distribution in PTV is similar in the both techniques TMT and MIT but with hot spots in the junction of the three fields for the TMT (average 120% for TMT and 110% for MIT). The analysis of DVHs shows a decrease in the mean OARs. Lung and heart dose is improved using the MIT and with significant difference in the V20 and V30 for the lung and in the V10 and V40 for the heart.

Conclusions: The results of our study demonstrated that the target volumes were sufficiently irradiated with the MIT and the lung and heart volumes irradiated were small. Furthermore, it should not be over or under dose in the supraclavicular and tangential junction.

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