A software for inversion of multiexponential decay data for Windows system
by V. Bortolotti, R.J.S. Brown, P. Fantazzini*
What does it do?
The program UpenWin serves to invert, in a Windows Environment, a series of data presumed to be the sum of exponential functions, generating a quasi-continuous distribution of decay times more appropriate to the data, taking account of signal-to-noise ratio variation with decay time.
He didn't use UpenWin!
Why the name?
UpenWin implements UPEN, an algorithm for the inversion of multiexponential decay data that applies a regularization parameter which is variable with decay time, making the regularization "penalty" function uniform, giving the name "Uniform PENalty."
In what areas can it be applied?
In any application involving physical phenomena presumed to give a superposition of exponential decay processes.
Why is it better?
It provides smoothing appropriate to the variation of local signal-to-noise ratio with decay time, whether for large sharp peaks or for low tails present in the same distribution, without inappropritely widening the peaks or breaking the tails into multiple peaks.
What do I risk by not using it?
Attributing physical-chemical significance to features of a computed distribution not required by the data.
Why buy it?
Simple! It is powerful and with a high quality for the price.
© 2008 Alma Mater Studiorum – Università di Bologna
* The algorithm UPEN and the software UpenWin have been developed by the research group MRPM
(Magnetic Resonance in Porous Media), Department of Physics and Department DICMA, University of Bologna.