Leo Huf Campos Braga

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An 8 16 pixel array based on CMOS small-area silicon photomultipliers (mini-SiPMs) detectors for PET applications is reported. Each pixel is 570 610 m in size and contains four digital mini-SiPMs, for a total of 720 SPADs, resulting in a full chip fill-factor of 35.7%. For each gamma detection, the pixel provides the total detected energy and a timestamp,(More)
This paper presents a radiation hardened Active Pixel Sensor implemented in a standard 0.35μm CMOS process. The integrated circuit is composed of a 64x64 pixel matrix with a 25μm pixel pitch and has four different pixel architectures. There are also test structures to permit the characterization of the MOS transistors. The radiation hardening of(More)
This paper is the first comprehensive presentation of the SPADnet concept. SPADnet is a fully digital, networked MRI compatible time-of-flight PET system, exploiting the speed and integration density of deep-submicron CMOS technologies. The core enabling technologies of SPADnet are a sensor device comprising an array of 8x16 pixels, each composed of 4(More)
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