Nonrigid registration algorithm for longitudinal breast MR images and the preliminary analysis of breast tumor response. - Xia Li; Benoit M. Dawant; E. Brian Welch; A. Bapsi Chakravarthy; Darla Freehardt; Ingrid A. Mayer; Mark C. Kelley; Ingrid M. Meszoely; John C. Gore; Thomas E. Yankeelov (Image Processing, 2009)