| Title |
Improved digital pulse height estimation for PET detectors using LMS adaptive filters |
Submitted |
26-JAN-07 08:55 (UTC -06:00) |
| Classification |
Front-end Signal Processing |
Modified |
22-MAR-07 17:12 (UTC -05:00) |
| Session |
PS1C |
Presentation |
Poster |
| Presenter |
Jose Maria Monzo |
Paper ID |
PS1C003 |
|
|
Paper PDF |
Download |
| Author(s) |
Jose Maria Monzo, Raul Esteve Bosch, Vicente Herrero, Jorge Daniel Martinez, Francisco Jose Mora, Angel Sebastia, Jose Toledo (U.P.V., Valencia), Jose Maria Benlloch, Christoph Werner Lerche, Filomeno Sanchez (IFIC, Valencia) |
| Abstract |
Digital PET systems enable us to implement sophisticated algorithms for real time signal processing. Usually, energy and position are encoded on the amplitude of the digitized signals. Although a lot of work has been made for spectroscopy applications*, digital pulse height estimation in PET detectors presents important challenges mainly due to the fast response of state-of-the-art detectors. In this paper we propose a digital filtering technique for improving amplitude estimation in order to achieve high spatial and energy resolution with moderated conversion rates (<80 MSPS). Our approach is based on the trapezoidal shaping of the incoming pulses by using adaptive filtering based on LMS algorithm for modelling detector and front-end electronics response. Thus, the filtered signals are well suited both for pile-up recovery and accurate pulse height computation. The filter can be easily implemented on programmable devices and integrated on the data acquisition chain for real-time applications. Measurements employing a dual-head continuous LSO scanner will be presented. |
|
Word Count: 157 Character Count: 1074 |
| Footnote |
*A. Geraci et alt., "Adaptive Digital Spectroscopy in Programable Logic" IEEE Trans. Nucl. Sci., vol.47,NO. 6, Dec. 2000.
|
| Funding Agency |
This work is funded by the Spanish Ministry of Education and Science (MEC) through the research project DPI2004-04268-C02-02. J.M.Monzo is supported by FPI grant from the Spanish MEC BES-2005-10873 |
