Reducing heart dose during left breast cancer radiotherapy: Comparison among 3 radiation techniques

Giuseppe R. D'Agostino, Barbara Diletto, Giovanna Mantini, Luigia Nardone, Gian Carlo Mattiucci, Francesco Catucci, Roberta Canna, Antonella Martino, Luigi Azario, Vincenzo Valentini

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: Breast cancer survivors have a high risk of cardiac death as a consequence of heart irradiation during left breast tangential radiotherapy (RT). This study compares the cardiac dose delivered by standard 3D conformal tangential RT (CRT) to that delivered by prospective-gating RT (PGRT) or 5-field intensity-modulated RT (IMRT). Methods: Patients with early left breast cancer, referred for adjuvant RT to our institution, were enrolled in this study. For each patient, 2 simulation computed tomography scans were acquired: the first during free breathing, and the second on prospective gating during deep inspiration breath-hold. The scans were monitored by the Varian RPM™ respiratory gating system. For each patient, 3 treatment plans were performed: a 3D-CRT and an IMRT plan, each based on the free-breathing scan, and a PGRT plan, based on the deep inspiration breath-hold scan. Dose-volume histograms were compared by means of the Friedman test. Results: The median mean heart dose was 3 Gy (range 0.9-7.3 Gy) in the CRT plans, 1.9 Gy (range 0.5-3.6 Gy) in the PGRT plans, and 4.5 Gy (range 1.1-10.5 Gy) in the IMRT plans (p = 0.001). The mean heart V25 was 1.2% (range 0%-9.7%), 0% (range 0%-2.0%), and 0.2% (range 0%-7.3%) for CRT, PGRT, and IMRT plans, respectively (p

Original languageEnglish
Pages (from-to)184-189
Number of pages6
JournalTumori
Volume102
Issue number2
DOIs
Publication statusPublished - Mar 1 2016

Keywords

  • Deep inspiration breath-hold
  • Early breast cancer
  • Heart irradiation
  • Heart sparing
  • Left breast cancer radiotherapy

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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