Evaluation of a simple method for reconstructing asymmetrically sampled echo data.
A simple method for reconstructing echo data with a large degree of sampling asymmetry was investigated. The method is based on the application of an optimized data sampling window before standard Fourier transform magnitude reconstruction. The performance of this "windowed direct" reconstruction was evaluated with theoretical simulations and experimental measurements and compared with that of the half-Fourier method. With the proper selection of data sampling window parameters, highly asymmetric echo data reconstructed with standard Fourier transform magnitude algorithms produced images similar in quality to those reconstructed with the half-Fourier method. Windowed direct reconstruction provides a simple and computationally fast alternative to more sophisticated algorithms and may be particularly applicable for specialized or developmental applications.
Mugler
J P
JP
Department of Radiology, MRI Facility, University of Virginia Health Sciences Center, Charlottesville 22908.
Brookeman
J R
JR
D005069:Evaluation Studies as Topic; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008961:Models, Structural