[Poster] Clinical Experience in the Use of Transit Dosimetry for Breast Cancer Treatment

S. Celi, P. François PhD, E. Costa, J.L. Dumas PhD, F. Campana MD
Institut Curie, Medical Physics Department, Paris, France

Presented at ESTRO 2014

Introduction: After six years of experience in transit in vivo dosimetry (IVD), routine IVD controls for breast cancer treatments were finally introduced in 2012. The immediate observation was that the dose differences for breast treatments in supine position are worse than other dose differences for similar techniques, including breast treatments in lateral position. Dosimetrical causes could be ruled out. But manually matching the measured images to the structures contoured on the CT scan resulted in better IVD results. The breast cancer treatment statistics for 176 patients (1361 controls, one control point) were analyzed. The causes and effects of the observations were investigated.