Quanti cation and Improvement of the Signal-to-Noise Ratio in a Magnetic Resonance Image Acquisition Procedure
نویسنده
چکیده
A procedure is developed to quantify and improve the signal-to-noise ratio (SNR) of Magnetic Resonance images. The image SNR is quanti ed using the correlation function of two independent acquisitions of an image. To test the performance of the quanti cation, SNR measurement data are tted to theoretically expected curves. The proposed correlation technique is also used to improve the SNR by estimating the amplitude of the signal spectrum. The technique is applied to a set of MR images and its performance, in terms of gain in SNR, contrast-to-noise ratio (CNR) and resolution loss, is compared to that of classical noise lters. The SNR as well as the CNR is found to be improved signi cantly with minor loss of resolution. Finally, it is shown that the correlation technique can be implemented in a highly e cient way in almost any acquisition procedure of a Magnetic Resonance Imaging System.
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