Title :
Improving conspicuity in MPI by equalization of the “broad tails” of the MPI point spread function
Author :
Price, D.A. ; Sun, George L. G. ; Goodwill, P.W. ; Saritas, E.U. ; Conolly, S.M.
Author_Institution :
Electr. Eng. & Comput. Sci., Univ. of California Berkeley, Berkeley, CA, USA
Abstract :
The point spread function (PSF) in MPI has been found to be the derivative of the Langevin function. This PSF has noticeably longer “tails” than a single Gaussian. These tails of the PSF manifest as baseline blurring, which significantly decreases contrast and “glare” in MPI. Here, we develop a robust post-processing method to equalize (similar to deconvolution) the PSF, to essentially remove these tails. Fortunately we find this equalization method does not incur the enormous loss of SNR observed in conventional deconvolution.
Keywords :
Gaussian processes; biomedical imaging; magnetic particles; optical transfer function; Gaussian function; Langevin function; MPI point spread function; broad tails; Approximation methods; Deconvolution; Signal resolution; Signal to noise ratio; Spatial resolution; Transfer functions;
Conference_Titel :
Magnetic Particle Imaging (IWMPI), 2013 International Workshop on
Conference_Location :
Berkeley, CA
Print_ISBN :
978-1-4673-5520-9
Electronic_ISBN :
978-1-4673-5521-6
DOI :
10.1109/IWMPI.2013.6528384
