1 Department of Radiology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts. Electronic address: Michael_Rosenthal@dfci.harvard.edu.
2 Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
3 Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts.