Digital signal processing techniques to improve time resolution in positron emission tomography

Author

Monzo, J.M. ; Esteve, R. ; Lerche, C.W. ; Ferrando, N. ; Toledo, J. ; Aliaga, R.J. ; Herrero, V. ; Mora, F.J.

Author_Institution

i3M (Inst. de Instrumentacion para Imagen Mol.), Univ. Politec. de Valencia, Valencia, Spain

fYear

2010

fDate

24-28 May 2010

Firstpage

1

Lastpage

6

Abstract

Coincidence time resolution is one of the most important issues in PET detectors. Improving this resolution is required to increase true event coincidence rates that reduce the noise in the reconstructed images. The aim of this work is to obtain a better time resolution for our PET system designing the most appropriate time extraction digital algorithm. The experimental setup used for this research is composed by two monolithic LSO crystals+PSPMT detectors and an FPGA based PET data acquisition system (DAQ) for 16 heads. The acquired signals are sampled using a 12-bit 70MHz ADC per channel. The setup has no centralized electronics for trigger and event time extraction. Consequently, each detector head is processed independently and all the signals are acquired in the same way.

Keywords

data acquisition; field programmable gate arrays; image reconstruction; medical image processing; positron emission tomography; ADC; Coincidence time resolution; FPGA; PET data acquisition system; PET detectors; PSPMT detectors; digital signal processing techniques; monolithic LSO crystals; positron emission tomography; reconstructed images; time extraction digital algorithm; Computational fluid dynamics; Delay; Detectors; Field programmable gate arrays; Interpolation; Positron emission tomography; Signal resolution;

fLanguage

English

Publisher

ieee

Conference_Titel

Real Time Conference (RT), 2010 17th IEEE-NPSS

Conference_Location

Lisbon

Print_ISBN

978-1-4244-7108-9

Type

conf

DOI

10.1109/RTC.2010.5750417

Filename

5750417