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Título: | Design of a smart SiPM based on focal-plane processing elements for improved spatial resolution in PET |
Autor: | Pozas-Flores, F. CSIC; Carmona-Galán, R. CSIC ORCID ; Fernández-Berni, J. CSIC ORCID CVN; Rodríguez-Vázquez, Ángel CSIC ORCID | Fecha de publicación: | 2011 | Editor: | The International Society for Optics and Photonics | Citación: | V Bioelectronics, Biomedical, and Bioinspired Systems ; and V Nanotechnology (2011) | Serie: | Proceedings of SPIE 8068 | Resumen: | Single-photon avalanche diodes are compatible with standard CMOS. It means that photo-multipliers for scintillation detectors in nuclear medicine (i. e. PET, SPECT) can be built in inexpensive technologies. These silicon photo-multipliers consist in arrays of, usually passively-quenched, SPADs whose output current is sensed by some analog readout circuitry. In addition to the implementation of photosensors that are sensitive to singlephoton events, analog, digital and mixed-signal processing circuitry can be included in the same CMOS chip. For instance, the SPAD can be employed as an event detector, and with the help of some in-pixel circuitry, a digitized photo-multiplier can be built in which every single-photon detection event is summed up by a counter. Moreover, this concurrent processing circuitry can be employed to realize low level image processing tasks. They can be efficiently implemented by this architecture given their intrinsic parallelism. Our proposal is to operate onto the light-induced signal at the focal plane in order to obtain a more elaborated record of the detection. For instance, by providing some characterization of the light spot. Information about the depth-of-interaction, in scintillation detectors, can be derived from the position and shape of the scintillation light distribution. This will ultimately have an impact on the spatial resolution that can be achieved. We are presenting the design in CMOS of an array of detector cells. Each cell contains a SPAD, an MOS-based passive quenching circuit and drivers for the column and row detection lines. | Descripción: | Comunicación presentada al "V Bioelectronics, Biomedical, and Bioinspired Systems V and Nanotechnology" celebrado en Praga (República Checa) del 18 al 20 de Abril del 2011. | Versión del editor: | http://dx.doi.org/10.1117/12.888836 | URI: | http://hdl.handle.net/10261/84560 | DOI: | 10.1117/12.888836 | Identificadores: | doi: 10.1117/12.888836 isbn: 9780819486578 |
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smart SiPM.pdf | 649,75 kB | Adobe PDF | Visualizar/Abrir |
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