Correction methods for missing data in sinograms of the HRRT PET scanner

The high resolution research tomograph (HRRT) is a 3-D PET scanner designed for human brain and small animal imaging. The HRRT consists of eight panel detector heads that are separated by gaps of 17 mm resulting in gaps in the sinogram. Furthermore, gaps can result from detector-block failure. To pr...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on nuclear science 2003-10, Vol.50 (5), p.1452-1456
Main Authors: de Jong, H.W.A.M., Boellaard, R., Knoess, C., Lenox, M., Michel, C., Casey, M., Lammertsma, A.A.
Format: Article
Language:English
Subjects:
Animals
Detectors
Filling
Gaps
Head
High-resolution imaging
Humans
Image reconstruction
Image resolution
Interpolation
Mathematical models
Maximization
Positron emission
Positron emission tomography
Scanners
Studies
Tomography
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The high resolution research tomograph (HRRT) is a 3-D PET scanner designed for human brain and small animal imaging. The HRRT consists of eight panel detector heads that are separated by gaps of 17 mm resulting in gaps in the sinogram. Furthermore, gaps can result from detector-block failure. To prevent artifacts in the reconstruction when using Fourier rebinning (FORE), filling the data gaps is required. The purpose of this study was to evaluate the accuracy of three gap filling methods: a) bilinear interpolation of sinogram data; b) a model-based method in which an intermediate volume is reconstructed [2-D ordered subsets expectation maximization (2-D OSEM)] based on direct planes only, after which this image is forward projected to fill the gaps; c) an improved model-based method in which gaps are first filled using interpolation, then reconstructed using FORE + 2-D OSEM and forward projected. The improved model-based method outperforms interpolation, but requires more computation time.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2003.817366