Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9845321 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2005 | 5 Pages |
Abstract
This paper describes the design of a coincidence processing board for a dual-head Positron Emission Tomography (PET) scanner for breast imaging. The proposed block-oriented data acquisition system relies on a high-speed DSP processor for fully digital trigger and on-line event processing that surpasses the performance of traditional analog coincidence detection systems. A mixed-signal board has been designed and manufactured. The analog section comprises 12 coaxial inputs (six per head) which are digitized by means of two 8-channel 12-bit 40-MHz ADCs in order to acquire the scintillation pulse, the charge division signals and the depth of interaction within the scintillator. At the digital section, a state-of-the-art FPGA is used as deserializer and also implements the DMA interface to the DSP processor by storing each digitized channel into a fast embedded FIFO memory. The system incorporates a high-speed USB 2.0 interface to the host computer.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
J.D. MartÃnez, J. Toledo, R. Esteve, A. Sebastiá, F.J. Mora, J.M. Benlloch, M.M. Fernández, M. Giménez, E.N. Giménez, Ch.W. Lerche, N. Pavón, F. Sánchez,