A new NMF variant estimates integer and non-integer temporal shifts plus stretching in the frequency domain to improve brain tissue delineation in emission tomography data.
Quantitative evaluation of unsupervised clustering algorithms for dynamic total-body PET im- age analysis
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Shift- and stretch-invariant non-negative matrix factorization with an application to brain tissue delineation in emission tomography data
A new NMF variant estimates integer and non-integer temporal shifts plus stretching in the frequency domain to improve brain tissue delineation in emission tomography data.