Effects of millimetric shifts in breast cancer radiotherapy on the radiation dose distribution

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Sanli Y. T., Cukurcayir F., Abacigil F.

Asian Pacific Journal of Cancer Prevention, vol.17, no.3, pp.1197-1199, 2016 (Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 3
  • Publication Date: 2016
  • Doi Number: 10.7314/apjcp.2016.17.3.1197
  • Journal Name: Asian Pacific Journal of Cancer Prevention
  • Journal Indexes: Scopus
  • Page Numbers: pp.1197-1199
  • Keywords: Breast cancer, Millimetric shifts, Radiation dose distribution, Radiotherapy
  • Hatay Mustafa Kemal University Affiliated: Yes

Abstract

Background: This study aimed to facilitate decision-making in cases of breast cancer radiotherapy shifts by simulating millimetric shifts and analyzing their effects on dose distribution. Methods: The study included 30 patients with left side breast cancer who were treated with three dimensional conformal radiotherapy (3D-CRT) in the Radiation Oncology Department in Hatay Public Hospital, between January 2013 and April 2015. A treatment plan shifting at three axes with six different measures was simulated. Results: The biggest difference in values was (+3mm shift) 476cGy, with a 7.7 % change for heart and 25.6% for spinal cord. The shifts in values respectively for CTV min, mean, max were -4.8%, 2.5%, 4%. The differences for lymphatic min, mean, max were 21.3%, 20.3%, -12.2%. Conclusion: The most important thing is not the treatment plan quality, but its practicality. The treatment plan must be practical and its practice must be controlled rigidly.