NiftyPAD - Novel Python Package for Quantitative Analysis of Dynamic PET Data

AbstractCurrent PET datasets are becoming larger, thereby increasing the demand for fast and reproducible processing pipelines. This paper presents a freely available, open source, Python-based software package called NiftyPAD, for versatile analyses of static, full or dual-time window dynamic brain PET data. The key novelties of NiftyPAD are the analyses of dual-time window scans with reference input processing, pharmacokinetic modelling with shortened PET acquisitions through the incorporation of arterial spin labelling (ASL)-derived relative perfusion measures, as well as optional PET data-based motion correction. Results obtained with NiftyPAD were compared with the well-established software packages PPET and QModeling for a range of kinetic models. Clinical data from eight subjects scanned with four different amyloid tracers were used to validate the computational performance. NiftyPAD achieved\(R^2>0.999\) correlation with PPET, with absolute difference\(\sim 10^{-2}\) for linearised Logan and MRTM2 methods, and\(R^2>0.999999\) correlation with QModeling, with absolute difference\(\sim 10^{-4}\) for basis function based SRTM and SRTM2 models. For the recently published SRTM ASL method, which is unavailable in existing software packages, high correlations with negligible bias were observed with the full scan SRTM in terms of non-displaceable binding potential (\(R^2=0.96\)), indicating reliable model implementation in NiftyPAD. Together, these findings illustrate t...
Source: Neuroinformatics - Category: Neuroscience Source Type: research