Affiliation: | a Department of Mechanical and Aerospace Engineering, Rutgers University, 98 Brett Road, Room B-217 Piscataway, NJ 08854 USA b Northeast Proton Therapy Center, Massachusetts General Hospital Boston, MA 02114 USA c Massachusetts Institute of Technology, Department of Mechanical Engineering Cambridge, MA 02139 USA d Laboratoire de Mécanique des Solides, Université de Poitiers Bât. SP2MI 86960 Futuroscope France |