Incorporation of a two metre long PET scanner in STIR

[摘要] The Explorer project aims to investigate the potential benefits of a total-body 2 metre long PET scanner. The following investigation incorporates this scanner in STIR library and demonstrates the capabilities and weaknesses of existing reconstruction (FBP and OSEM) and single scatter simulation algorithms. It was found that sensible images are reconstructed but at the expense of high memory and processing time demands. FBP requires 4 hours on a core; OSEM: 2 hours per iteration if ran in parallel on 15-cores of a high performance computer. The single scatter simulation algorithm shows that on a short scale, up to a fifth of the scanner length, the assumption that the scatter between direct rings is similar to the scatter between the oblique rings is approximately valid. However, for more extreme cases this assumption is not longer valid, which illustrates that consideration of the oblique rings within the single scatter simulation will be necessary, if this scatter correction is the method of choice.

[发布机构] Division of Biomedical Imaging, University of Leeds, Leeds; LS2 9JT, United Kingdom^1;School of Physics and Astronomy, University of Leeds, Leeds; LS2 9JT, United Kingdom^2

[效力级别] 医药卫生 [学科分类] 卫生学

[关键词] High performance computers;PET scanner;Potential benefits;Processing time;Scatter correction;Single scatter simulation