Presented by: Daniel S. Weller, Author(s): Daniel S. Weller, Massachusetts Institute of Technology, United States; Jonathan R. Polimeni, Massachusetts General Hospital, United States; Leo Grady, Siemens Corporate Research, United States; Lawrence L. Wald, Massachusetts General Hospital, United States; Elfar Adalsteinsson, Vivek K. Goyal, Massachusetts Institute of Technology, United States