Title :
An efficient region of interest acquisition method for dynamic magnetic resonance imaging
Author :
Hoge, William Scott ; Miller, Eric L. ; Lev-Ari, Hanoch ; Brooks, Dana H. ; Karl, William Clem ; Panych, Lawrence P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
fDate :
7/1/2001 12:00:00 AM
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
Keywords :
Fourier analysis; biomedical MRI; error analysis; image representation; medical image processing; minimisation; singular value decomposition; Fourier method; ROI; SVD methods; arbitrarily-shaped region of interest; dynamic magnetic resonance imaging; error level; low-order representations; minimal order; natural error metric; optimization approach; reduced-order MRI acquisition; region of interest acquisition method; singular value decomposition method; Biological tissues; High-resolution imaging; Image reconstruction; Image sampling; Magnetic resonance; Magnetic resonance imaging; Radio frequency; Singular value decomposition; Spatial resolution; Systems engineering and theory;
Journal_Title :
Image Processing, IEEE Transactions on