IEEE Transactions on Nuclear Science · 2004 · 45 citations · 9 references
EngineeringBiomedical EngineeringNuclear MedicineAnalog ElectronicsBiomedical ImagingDiagnostic ImagingBiomedical InstrumentationDetector TechnologyMedical Imaging InstrumentationPositron Emission TomographyRadiation DetectorsRadiation Imaging DetectorsCharge-sensitive AmplifiersDetector Timing ResolutionFront-end ArchitectureFront-end DesignPet Detector TechnologyPositron Emission Tomography DetectorsPositron Emission Tomography InstrumentationTiming Resolution
We report on the development of the front-end electronics for rat conscious animal positron emission tomography (RatCAP), a portable and miniature positron emission tomography scanner. The application-specific integrated circuit (ASIC) is realized in a complementary metal-oxide-semiconductor 0.18 /spl mu/m technology and is composed of 32 channels of charge sensitive preamplifier, third-order semi-Gaussian bipolar shaper, timing discriminator with independent channel adjustable threshold, and a 32-line address serial encoder to minimize the number of interconnections between the camera and the data acquisition system. Each chip has a maximum power dissipation of 125 mW. A mathematical model of the timing resolution as a function of the noise and slope at the discrimination point as well as the photoelectron statistics was developed and validated. So far, three ASIC prototypes implementing part of the electronics were sent to fabrication. Results from the characterization of the first two prototypes are presented and discussed.
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Low-Noise Techniques in Detectors
V. Radeka · Annual Review of Nuclear and Particle Science · 1988 · 503 citations · Full text