Implementation of a fast gradient-echo SVD encoding technique for dynamic imaging.
In the paper, the results of a fast gradient-echo implementation of the singular value decomposition (SVD) encoding technique for dynamic imaging are presented. The method used is an adaptation with several critical modifications of a keyholetype approach previously proposed but not implemented. The method was tested by imaging the events following injection of a contrast agent into a phantom, producing a series of dynamic image updates. It is demonstrated that, for this type of application, the SVD encoding technique adequately follows dynamic changes with even a small number of encodes. The result is compared qualitatively to that obtained by standard Fourier-based keyhole imaging and is shown to provide improved spatial resolution of dynamic events when updating with the same number of encodes.
Panych
L P
LP
Department of Radiology, Harvard Medical School, Boston, Massachusetts, USA.
Oesterle
C
C
Zientara
G P
GP
Hennig
J
J
D000465:Algorithms; D003287:Contrast Media; D005583:Fourier Analysis; D019786:Gadolinium DTPA; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives; D019047:Phantoms, Imaging; D012815:Signal Processing, Computer-Assisted
D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D019786:Gadolinium DTPA