An improved kernel for analytical time-of-flight PET reconstruction

Author

Watson, Charles C.

Author_Institution

Siemens Med. Solutions Molecular Imaging, Knoxville

Volume

4

fYear

2007

fDate

Oct. 26 2007-Nov. 3 2007

Firstpage

2721

Lastpage

2726

Abstract

We demonstrate a new weighting kernel for linear time-of-flight (TOF) positron emission tomography (PET) reconstruction that produces lower image noise variance in finite-sized objects than "confidence weighting" (CW) or any other kernel previously reported in the literature. The proposed kernel is adaptive to object size, but is always broader than the CW kernel. For 1.25 nsec TOF resolution, the new kernel improves image noise variance in a 10 cm diameter cylinder by 8%. Small but significant gains in image noise variance are also seen in clinical reconstructions.

Keywords

image denoising; image reconstruction; image resolution; medical image processing; positron emission tomography; TOF resolution; confidence weighting kernel; image noise variance; positron emission tomography; size 10 cm; time 1.25 ns; time-of-flight PET reconstruction; Analysis of variance; Gain measurement; Image analysis; Image reconstruction; Image resolution; Kernel; Noise measurement; Nuclear and plasma sciences; Positron emission tomography; Reconstruction algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE

Conference_Location

Honolulu, HI

ISSN

1095-7863

Print_ISBN

978-1-4244-0922-8

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2007.4436706

Filename

4436706