[1] Yale Univ, Sch Med, Dept Therapeut Radiol, New Haven, CT 06510 USA
[2] Columbia Univ, Dept Radiat Oncol, New York, NY 10032 USA
[3] Vanderbilt Univ Sch Med, Dept Radiat Oncol, Nashville, TN 37232 USA
[4] Scripps Res Inst, Div Radiat Oncol, La Jolla, CA 92037 USA
[5] Univ Florida, Dept Radiat Oncol, Gainesville, FL 32610 USA
[6] Univ Rochester, Ctr Canc, Dept Radiat Oncol, Rochester, NY 14642 USA
[7] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA
[8] Cedars Sinai Med Ctr, Dept Med Phys & Imaging, Los Angeles, CA 90048 USA
[9] Yale Univ, Sch Med, Dept Diagnost Radiol, New Haven, CT 06510 USA
[10] Emory Clin, Atlanta, GA 30322 USA
[11] Mayo Clin & Mayo Fdn, Cardiovasc Dept, Rochester, MN 55905 USA