title: An efficient region of interest acquisition method for dynamic magnetic resonance imaging.
abstract: Motivated by work in the area of dynamic magnetic resonance imaging (MRI), we develop a new approach to the problem of reduced-order MRI acquisition. Efforts in this field have concentrated on the use of Fourier and singular value decomposition (SVD) methods to obtain low-order representations of an entire image plane. We augment this work to the case of imaging an arbitrarily-shaped region of interest (ROI) embedded within the full image. After developing a natural error metric for this problem, we show that determining the minimal order required to meet a prescribed error level is in general intractable, but can be solved under certain assumptions. We then develop an optimization approach to the related problem of minimizing the error for a given order. Finally, we demonstrate the utility of this approach and its advantages over existing Fourier and SVD methods on a number of MRI images.
authors.affiliation: Department of Electrical and Computer Engineering, Northeastern University, Boston, MA 02215, USA.
authors.forename: W S
authors.initials: WS
authors.lastname: Hoge
authors.forename: E L
authors.initials: EL
authors.lastname: Miller
authors.forename: H
authors.initials: H
authors.lastname: Lev-Ari
authors.forename: D H
authors.initials: DH
authors.lastname: Brooks
authors.forename: W C
authors.initials: WC
authors.lastname: Karl
authors.forename: L P
authors.initials: LP
authors.lastname: Panych