1. Department of Mathematics; University of Arizona; Tucson Arizona USA
2. Department of Imaging, Center for Advanced Medical Imaging Sciences; Massachusetts General Hospital, Harvard Medical School; Boston Massachusetts USA
3. Department of Medical Imaging; University of Arizona; Tucson Arizona USA
4. Division of Imaging and Applied Mathematics; Food and Drug Administration; Silver Spring Maryland USA
5. The College of Optical Sciences; University of Arizona; Tucson Arizona USA
6. Department of Electrical and Computer Engineering; University of Arizona; Tucson Arizona USA
7. Department of Biomedical Engineering; University of Arizona; Tucson Arizona USA