Int. J. Biomedical Engineering and Technology, Vol. 8, Nos. 2/3, 2012 117 Copyright © 2012 Inderscience Enterprises Ltd. Comparison of two techniques for target motion evaluation based on 4DCT images Yulia Lyatskaya* Dana-Farber Cancer Institute and Brigham and Women’s Hospital, Department of Radiation Oncology, Harvard Medical School, Boston, MA 02115, USA Fax: (617) 582-6037 E-mail: ylyatskaya@lroc.harvard.edu *Corresponding author Kira Rehfeld Dana-Farber Cancer Institute and Brigham and Women’s Hospital, Department of Radiation Oncology, Harvard Medical School, Boston, MA 02115, USA E-mail: rehfeld@pik-potsdam.de and University of Heidelberg, Heidelberg, Germany Dnyanesh V. Kadam Dana-Farber Cancer Institute and Brigham and Women’s Hospital, Department of Radiation Oncology, Harvard Medical School, Boston, MA 02115, USA E-mail: dkadam@lroc.harvard.edu Hale Caglar Dana-Farber Cancer Institute and Brigham and Women’s Hospital, Department of Radiation Oncology, Harvard Medical School, Boston, MA 02115, USA E-mail: hcaglar@lroc.harvard.edu and Department of Radiation Oncology, Marmara University Medical School Hospital, Istanbul, Turkey E-mail: halebasakcaglar@gmail.com