E-ISSN 2587-0831
Original Article
Dosimetric Comparison of Three-Dimensional Conformal Radiotherapy (3D-CRT) and Intensity Modulated Radiotherapy Techniques (IMRT) with Radiotherapy Dose Simulations for Left-Sided Mastectomy Patients
1 Department of Medical Imaging Techniques, University of Health Sciences, İstanbul, Turkey  
2 Department of Radiology, University of Health Sciences, İstanbul, Turkey  
3 Department of Radiation Oncology, Necmettin Erbakan University School of Medicine, Konya, Turkey  
Eur J Breast Health 2019; 15: 85-89
DOI: 10.5152/ejbh.2019.4619
Key Words: Left-sided mastectomy, three-dimensional conformal radiotherapy, intensity-modulated radiotherapy, dose simulation, dosimetry
Abstract

Objective: To compare 3-dimensional conformal radiotherapy (3D-CRT) and intensity modulated radiotherapy (IMRT) techniques on the target tissue and critical organ doses in terms of dosimetry, during treatment planning of patient’s post-mastectomy radiotherapy (PMRT) to the left chest wall.

 

Materials and Methods: Twenty breast cancer patients with left-sided post-mastectomy have selected for PMRT both 3D-CRT and IMRT techniques. Dosimetric calculation of dose simulation in Eclipse treatment planning system have been performed. Organs at risk with the maximum dose, minimum dose, mean dose, D95, conformity and homogeneity indexes and total monitor unit for the Planning Target Volume were compared in terms of the critical organ doses.

 

Results: There was no significant difference between the two treatment planning techniques in terms of maximum, minimum, mean dose and heterogeneity index (p>0.05). At low doses, the dose received at the heart was significantly lower with the 3D-CRT technique, but there was no statistically significant difference between the two techniques at the maximum and average doses in the high dose regions.

 

Conclusion: For PMRT to the left chest wall, IMRT significantly improves the conformity of plan and reduce the high-dose volumes of ipsilateral lung and heart compared to 3D-CRT, but 3D-CRT is superior in terms of low-dose volume.

 

Cite this article as: Aras S, İkizceli T, Aktan M. Dosimetric Comparison of Three-Dimensional Conformal Radiotherapy (3D-CRT) and Intensity Modulated Radiotherapy Techniques (IMRT) with Radiotherapy Dose Simulations for Left-Sided Mastectomy Patients. Eur J Breast Health 2019; 15(2): 85-89.

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