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Abstract #2406

Accelerated Exponential Fitting for Rapid Relaxation Time Mapping

Eggers H, Boesiger P
Philips Research

The quantification of relaxation times is commonly based on the fitting of an exponential function to a time series of signal intensities. Solving a non-linear regression problem for this purpose provides accurate estimates, but is rather time-consuming in form of the popular Levenberg-Marquardt method. It is proposed to perform a search for a real root of a polynomial in a small interval instead. This approach is shown to permit a substantial acceleration of the quantification compared to the Levenberg-Marquardt method, while achieving the same accuracy.