SensL Matrix System: Modular Scintillator Readout Solution for Nuclear Medicine


SensL’s Matrixis a modular, turnkey readout system specifically designed for nuclear medicine imaging applications. Using SensL’s silicon photomultiplier (SiPM) technology, the Matrix provides a fully solid-state, four-side scalable detector for the readout of scintillator arrays. It integrates the photosensor with all of the electronics required to localize, time stamp and discriminate scintillation events. Digitized event data comprising time, location and energy are sent to the host system via high-speed USB interface. By integrating multiple detector heads, the Matrix9 can perform temporal coincidence analysis, thereby reducing data rates to the host system. The Matrix is available as a turnkey, fully integrated module or as an OEM sub-system for rapid integration.

The Matrix detector head requires low power and operating voltage, is compact, highly robust and offers excellent spatial segmentation and uniformity of response. It addresses the need for high-resolution imagers such as those required for small animal, pre-clinical and mammography PET. The Matrix9?s high degree of modularity make it a compelling and cost effective substitute for PMTs in full-body PET systems.

The Matrix9 system architecture is modular and is based on three principal sub-systems:

—      Detector Head – a 144 pixel SPM matrix integrated on a four-side scalable daughter board. The detector head is fitted with mechanical mounting points and connects via an 80-way flexible printed circuit cable to the front-end electronics board.

—      The Front-end Electronics Board serves to bias the 144 SPMs and amplify their signals. Candidate signals are flagged through a programmable threshold discriminator and are digitized; time stamped, buffered and subsequently read out to the Matrix Communications board through a high-speed serial interface.

—      The Matrix Communications Board (Matrix9-C) provides all of the necessary control for up to 16 Matrix modules. It provides a common clock, retrieves and buffers event data and interfaces with the host computer through a high-speed USB connection.

The Matrix readout module (housing the detector head and the front-end electronics board) is available in a robust enclosure suitable for easy handling and prototype integration. For OEM integration the detector head and front-end electronics board are supplied separately without enclosure. A block diagram of the Matrix system is shown below. The system consists of a Communications board and up to 16 Matrix readout modules.


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