Platelets for multiscale analysis in medical imaging
Rebecca M. Willett, Robert D. Nowak · 2002
Describes the development and use of multiscale, platelet-based image reconstruction algorithms in medical imaging. Such algorithms are effective because platelets approximate images in certain (piecewise) smoothness classes significantly more efficiently than sinusoids, wavelets, or wedgelets. Platelet representations are especially well-suited to the analysis of Poisson data, unlike most other multiscale image representations, and they can be rapidly computed. We present a fast, platelet-based maximum penalized likelihood algorithm that encompasses denoising, deblurring, and tomographic reconstruction and its applications to photon-limited imaging. Platelet-based estimation techniques are applied to nuclear medicine data for denoising and confocal microscopy data for deblurring.