Bioacoustics Research Lab
University of Illinois at Urbana-Champaign | Department of Electrical and Computer Engineering | The Department of Bioengineering  Wednesday, December 12th, 2018
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Phase Sensitive and Insensitive Imaging for Clinical MR

Jingfei Ma, Ph. D.

Applied Science Lab, GE Medical Systems

In clinical MRI, the complex image after Fourier transform of the raw data is usually converted into a magnitude-only image for display. As a result, signal phase is generally discarded in the magnitude operation. A notable exception is the phase-contrast (PC) imaging, where preserving the phase is critical for extracting the encoded blood flow information. A few other phase sensitive imaging methods exist, but they are mainly restricted to the research community due to the complexity and limited robustness. In this talk, I will discuss the design and implementation of two phase-sensitive imaging examples, Dixon imaging for water and fat separation, and phase-sensitive inversion recovery imaging for improved tissue contrast. Both techniques have been under study for over a decade. Here, special emphasis will be paid to the reliability and the efficiency of the methods, crucial for their clinical adoption. An antithetical example will also be given in the case of diffusion weighted projection reconstruction fast spin echo imaging where elimination of the signal phase is required to ensure high-quality images. Along the discussion of these relatively traditional imaging techniques, some potential new applications will be illustrated.


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