Intrafractional and Interfractional Range Variation in Charged Particle Therapy of Lung Cancer

S. Mori, L. Dong, G. Starkschall, R. Mohan, J.D. Cox & T. Chen
Background: To quantify water equivalent pathlength (WEL) variations due to both intrafractional and interfractional changes in anatomy and physical properties through analysis of weekly serial four-dimensional (4D) CT scans. Materials and methods: Serial 4DCT scans were performed under free breathing[for full text, please go to the a.m. URL]