Analytic TOF PET reconstruction algorithm within DIRECT data partitioning framework. (1st April 2016)

• Record Type: Journal Article
• Authors: Matej, Samuel; Daube-Witherspoon, Margaret E; Karp, Joel S
• Is Part Of: Physics in medicine & biology. Volume 61:Number 9(2016:May)
• Page Start: 3365
• Page End: 3386
• Publication Date: 2016-04-01
• Subjects: positron emission tomography (PET) -- time-of-flight (TOF) -- tomographic image reconstruction -- analytic algorithm -- histo-image data partitioning; Biophysics -- Periodicals; Medical physics -- Periodicals; 610.153
• DOI: 10.1088/0031-9155/61/9/3365
• Languages: English
• ISSNs: 0031-9155

Abstract

Abstract: Iterative reconstruction algorithms are routinely used for clinical practice; however, analytic algorithms are relevant candidates for quantitative research studies due to their linear behavior. While iterative algorithms also benefit from the inclusion of accurate data and noise models the widespread use of time-of-flight (TOF) scanners with less sensitivity to noise and data imperfections make analytic algorithms even more promising. In our previous work we have developed a novel iterative reconstruction approach (DIRECT: direct image reconstruction for TOF) providing convenient TOF data partitioning framework and leading to very efficient reconstructions. In this work we have expanded DIRECT to include an analytic TOF algorithm with confidence weighting incorporating models of both TOF and spatial resolution kernels. Feasibility studies using simulated and measured data demonstrate that analytic-DIRECT with appropriate resolution and regularization filters is able to provide matched bias versus variance performance to iterative TOF reconstruction with a matched resolution model.