[1] Georgia Inst Technol, Sch Elect, Atlanta, GA 30332 USA
[2] Georgia Inst Technol, Sch Comp Engn, Atlanta, GA 30332 USA
[3] Georgia Inst Technol, Nucl & Radiol Engn Programs, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
[4] Georgia Inst Technol, Med Phys Programs, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
[5] Univ Calif San Diego, Ctr Adv Radiotherapy Technol, La Jolla, CA 92037 USA
[6] Univ Calif San Diego, Dept Radiat Oncol, La Jolla, CA 92037 USA
[7] Boston Univ, Dept Elect, Boston, MA 02215 USA
[8] Boston Univ, Dept Comp, Boston, MA 02215 USA
[9] Boston Univ, Dept Biomed Engn, Boston, MA 02215 USA