PET - Positron Emission Tomography



The EDNA group research interests involve advanced instrumentation for: Positron Emission Tomography, Integrated Analog-Digital front-end electronics, High speed data acquisition systems, Solid state photo detectors, Time of Flight PET, Analog and Digital signal processing.

PET setup

PET Setup

The research areas are:

- Analog Application Specific Integrated Circuit (ASIC) front-end for Positron Emission Tomography (PET) applications. EDNA has developed three different analog integrated front-ends: PESIC, AMIC and AMIC2GR. PESIC integrates a resistor charge divider circuit to reduce the PMT acquired signals. AMIC (Analog Moments Integrated Circuit) allows us to analyze the light distribution through moment calculation. AMIC allows us to take PET measurements of energy, position and depth of interaction with PSPMT. AMIC is expandable and easy to use. AMIC2GR allows the user to measure with different photodetectors (e.g. PSPMT and SiPM) by using the same setup and data acquisition system. It is also programmable and expandable and allows the user to measure with different moments associated with the light distribution or to simulate a resistor network array and use the CoG algorithm. Furthermore, measuring with AMIC2GR allows the user to easily calibrate the gains of each photodetector region (pad in case of PSPMT and SiPM in case of SiPM array).


- High speed and accurate time synchronized data acquisition systems. EDNA has developed different state-of-the-art high speed data acquisition systems (DAQs) for PET. The last developed DAQ architecture is a scalable compound of basic blocks which can be replicated in order to build a complete DAQ of variable size with no limitations regarding their physical location and number of detectors. The achieved global time synchronization error between the different blocks is good enough for TOF applications.

High speed data acquisition system


- Time measurement for PET systems. EDNA has proposed new digital time discriminators to improve the PET system time resolution. Nowadays, we are working on a TDC architecture that allows us to time stamp the first generated photons from a detected gamma ray thus, achieving the best possible time resolution.

- Characterization of different photodectors for PET systems. EDNA has been working with a 256 SiPM array and PSPMT attached to LSO and LYSO continuous crystal scintillators using the AMIC frontend architecture.


64-SiPM (8x8 array) AMIC2GR test board