We report on the NEMA-NU2-2012 performance of a hypothetical Monte Carlo (MC) model, Ex-PET, Siemens Biograph Vision positron emission tomography (PET)/CT (Bio-Vis) with sparse detector module rings and extended axial field view (AFOV). MC simulations were performed interleaved 32-mm gaps, equivalent to dimension each module, yielding an AFOV 48.0 cm (Bio-Vis has 25.6-cm AFOV). 3D-PET acquisiti...

Introduction Motion correction in PET imaging has been actively researched in the PET community, however obtaining accurate motion estimation is challenging. Motion has been usually estimated from CT images in PET/CT acquisition or from the PET data themselves. However, both modalities have limited accuracy for estimating motion because CT suffers from poor soft tissue contrast while PET has po...

We propose an extension of nonnegative matrix factorization (NMF) to multilayer network model for dynamic myocardial PET image analysis. NMF has been previously applied to the analysis and shown to successfully extract three cardiac components and time-activity curve from the image sequences. Here we apply triple nonnegative-matrix factorization to the dynamic PET images of dog and show details...

We propose a method to handle the automatic detection of PET lesions based on asymmetry feature measurement after segmenting the PET images. It is an essentially initial step in automatic diagnosis and content-based retrieval applications. Our technique includes six steps: Image alignment, segmentation, image reflection & subtraction, thresholding, background removal using morphological filteri...