By Topic

Signal Deconvolution Concept Combined With Cubic Spline Interpolation to Improve Timing With Phoswich PET Detectors

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Semmaoui, H. ; Dept. of Electr. & Comput. Eng., Univ. de Sherbrooke, Sherbrooke, QC ; Tetrault, M.-A. ; Lecomte, R. ; Fontaine, R.

PET imaging scanners based on all-digital architecture offer greater data processing flexibility and the possibility to recalibrate the system with simple software procedures. The LabPET scanner, designed at the Universite de Sherbrooke, is one such device. It is built around dual LYSO/LGSO scintillators in a phoswich arrangement coupled to Avalanche Photodiodes (APD) and combined with highly parallel readout and processing electronics. This approach enables the implementation of advanced real time digital signal processing methods to compute energy resolution, crystal identification and the arrival time of events. Timing extraction represents the highest challenge because of the low sampling frequency (45 MHz), the quantization error and the presence of a Zero Order Hold (ZOH) in the system. The aim of this paper is to present a method to increase coincidence time accuracy by adequately addressing each of these limitations. The proposed method uses a Deconvolution concept based on adaptive filter theory preceded by Cubic Spline interpolation to improve digital timing performance. The method achieves 4.5 ns, 8.2 ns, and 6.5 ns timing resolution with LYSO-LYSO, LGSO-LGSO and mixed crystals phoswich coincidences, respectively.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:56 ,  Issue: 3 )