Browsing by Author "Landeck, Jorge"
Now showing 1 - 6 of 6
Results Per Page
Sort Options
- An all-digital coincidence-selection and coincidence-trigger generation for a small animal RPC-PET cameraPublication . Clemêncio, Filomena; Loureiro, Custodio F. M.; Landeck, JorgeThe time resolution for gamma photon pairs of a detector based on resistive plate chamber technology is close to 300 ps FWHM. This allows a tight time window for coincidence detection, reducing the number of random coincidences observed and the overall noise of the acquired image. We implemented, inside a Xilinx Virtex-5 field programmable gate array, a fully programmable coincidence-trigger system with sub-nanosecond resolution and low latency for a small animal RPC-PET camera being built. An automatic procedure to construct a histogram of coincidences was implemented that helps characterizing the camera and allows compensating for different delays in the time channels. The time window for coincidences can then be placed at the optimal position helping rejecting coincidences from undesired sources.
- Coincidence detection in PETPublication . Clemêncio, Filomena; Landeck, JorgeA complex task for PET cameras is the design of a coincidence detection system that allows for a very tight time window. This brings us necessarily to discussing the concept of coincidence in PET (including the concepts of single, prompt and multiple events in a PET chamber), the different options for coincidence sorting and the concept of Field of View (FOV). We present results from a coincidence system we implemented in a Xilinx Virtex-5 FPGA with coincidence time windows of the order of a few hundred picoseconds and capable of FOV selection and multiple coincidence rejection implemented in real-time.
- D7.2 Proceedings of the First DREAM-GO Workshop: Simulation of consumers and markets towards real time demand responsePublication . Vale, Zita; Borges, Nuno; Faria, Pedro; Soares, João; Villarrubia, Gabriel; Corchado, Juan M.; Boldt, Diogo; Venayagamoorthy, G. Kumar; Matos, Luisa; Landeck, Jorge; Ferreira, Rodrigo; Spinola, João; Barriuso, Alberto L.; Paz, Juan F. deProceedings of the First DREAM-GO Workshop Institute of Engineering - Polytechnic of Porto, Porto, Portugal, April 6-7, 2016. Simulation of consumers and markets towards real time demand response
- D7.3 Proceedings of the Second DREAM-GO Workshop: Real-Time Demand Response and Intelligent Direct Load ControlPublication . Vale, Zita; Khorram Ghahfarrokhi, Mahsa; Faria, Pedro; Spínola, João; Canizes, Bruno; Pinto, Tiago; Soares, João; Chamoso, Pablo; Santos, Daniel; Garcia, Oscar; Catalina, Jorge; Guevarra, Fabio; Navarro-Cáceres, María; Gazafroudi, Amin Shokri; Prieto-Castrillo, Francisco; Corchado, Juan Manuel; Santos, Gabriel; Teixeira, Brígida; Praça, Isabel; Sousa, Filipe; Zawislak, Krzysztof; Iglesia, Daniel Hernández de la; Barriuso, Alberto Lopez; Lozano, Alvaro; Herrero, Jorge Revuelta; Landeck, Jorge; Paz, Juan F. de; Corchado, Juan M.; Garcia, Ruben Martin; González, Gabriel Villarrubia; Bajo, Javier; Matos, Luisa; Klein, L. Pires; Carreira, R.; Torres, I.; Landeck, JorgeProceedings of the Second DREAM-GO Workshop Real-Time Demand Response and Intelligent Direct Load Control
- Energy Resource Management Model in a Hotel Building Using a Web PlatformPublication . Sousa, Tiago; Faria, Pedro; Vale, Zita; Landeck, Jorge; Matos, Luisa; Ferreira, RodrigoDistributed generation and demand response have been fostered in the last years, sometimes less than desired. In fact, these energy resources, which have a distributed nature have been mostly applied and discussed in the wide view of the operation and planning of the distribution system. However, a great potential is now being explored in the scope of buildings energy management. In the present paper, an energy resource management model has been implemented in order to be integrated with a web platform that supports the customer information concerning energy usage. The model can be used for several kinds of buildings. A hotel building is focused in this paper, namely in the case study that discusses the use of each resource, including photovoltaic generation and demand response.
- Online trigger processing for a small-animal RPC-PET cameraPublication . Clemêncio, Filomena M. C.; Loureiro, Custódio F. M.; Landeck, JorgeA complex task for positron emission tomography (PET) cameras is the design of an appropriate coincidence-detec tion trigger system as it usually encompasses coincidences in a large number of channels and requires tight time specifications. Those requirements are even greater for a resistive plate chamber (RPC)-based detector technology since the time window specifica tion is quite small (in the order of a few hundred picoseconds) and the number of coincidence-channels can be quite large. Previous work showed that the time resolution for gamma photon pairs of a detector based on resistive plate chamber technology is under 300 ps full width at half maximum. This allows for a very tight time window for coincidence detection, with the corresponding benefits in reducing the number of random coincidences observed and, hence, the overall noise on the acquired image. In this paper, we first show experimental results of a coincidence-detection algo rithm implemented inside a Xilinx Virtex-5 field-programmable gate array for a small-animal RPC-PET camera being built.