MRI registration Using the phase correlation method Author: Robin Kramer.

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Presentation transcript:

MRI registration Using the phase correlation method Author: Robin Kramer

A composite head

A head to be registered

Motivation/Requirements MRI data spectral and is later transformed into spatial domain. Images are typically registered using by hand and with automation. Most automated techniques work with only small rotations, translations, and scalings.

Possible Solution Fourier shift –Notice the frequencies are not variant Phase correlation

Results Inconclusive The Discrete Fourier is not invariant to rotation. Many false correlations.

Further Work Better pre-processing Data Windowing

References Richard Szeliski, “Video Mosaics for Virtual Environments”. William Scott Hogue, “A Subspace Identification Extension to the Phase Correlation Method”. Hongjie Xie, et al. “Automatic Image Registration Based on a FFT Algorithm and IDL/ENVI”.