The dosimetric effect of residual breath-hold motion in pencil beam scanned proton therapy – An experimental study

Motion management in pencil beam scanned (PBS) proton therapy of mobile lung tumours is a prerequisite for accurate dose delivery [1]. Due to uncertainties caused by the motion (e.g. [2]), only a few PBS proton therapy centres offer lung cancer treatments [3], despite PBS potentially being superior to other techniques [4]. It should be mentioned however, that many lung cancer patients have been treated by ion beam therapy with good results (e.g. [5]). Similarly to conventional treatments with photons, for proton treatments, motion is typically accounted for in the planning step by increasing the margins around the target.

Source: Radiotherapy and Oncology - February 13, 2019 Category: Radiology Authors: Jenny Gorgisyan, Antony J. Lomax, Per Munck af Rosenschold, Gitte F. Persson, Miriam Krieger, Emma Colvill, Jonas Scherman, Francis Gagnon-Moisan, Martina Egloff, Giovanni Fattori, Svend Aage Engelholm, Damien C. Weber, Rosalind Perrin Tags: Original Article Source Type: research