PETRIC-a positron emission tomography readout integrated circuit

Pedrali-Noy, M.; Gruber, G.J.; Krieger, B.; Mandelli, E.; Meddeler, G.; Moses, W.W.; Rosso, V.

doi:10.1109/23.940103

Cited by 30 publications

(13 citation statements)

References 14 publications

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“…Regarding the radiation detection application specifications, the output pulse has a peaking time value of 1.81 s that shows no undershoot or pile up. The power consumption is 1 mW, far lower than the maximum allowed specified value of 8 mW, rendering the system as low power [28], [29].…”

Section: B Measurement Resultsmentioning

confidence: 99%

Advanced Low-Noise X-Ray Readout ASIC for Radiation Sensor Interfaces

Noulis

Siskos

Sarrabayrouse

et al. 2008

IEEE Trans. Circuits Syst. I

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A VLSI readout front-end architecture, dedicated for X-ray imaging, using specific capacitive silicon detectors, with capacitance ranging from 2 to 10 pF, is described. Critical design issues such as the noise optimization and the shaper implementation technique are addressed and the first performance-test results of a fabricated prototype in a 0.35-m 3.3-V CMOS process, are presented. Important feature of the design is the novel 2 pulse-shaper configuration since in this section, transconductor circuits are used in order to provide a broad range of continuous variable peaking time, programmable gain and adjustable undershoot while still maintaining the noise performance and the required linearity of the specific radiation detection application. Regarding the readout ASIC performance characteristics, the power consumption is 1 mW per channel, the equivalent noise charge at 1.81-s peaking time is 382 e plus 21 e per picofrard of detector capacitance. The topology achieves a conversion gain equal to 3.31 mV/fC and a linearity of 0.69%.

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Section: B Measurement Resultsmentioning

confidence: 99%

Advanced Low-Noise X-Ray Readout ASIC for Radiation Sensor Interfaces

Noulis

Siskos

Sarrabayrouse

et al. 2008

IEEE Trans. Circuits Syst. I

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“…The readout IC is described in detail in [17]. It is a mixed analog-digital design fabricated in CMOS (HP 0.5-m 3.3-V technology) and covering an area of 4.5 mm 4.8 mm.…”

Section: B Custom Readout Icmentioning

confidence: 99%

A compact 16-module camera using 64-pixel CsI(Tl)/Si p-i-n photodiode imaging modules

Choong

Gruber

Moses

et al. 2002

IEEE Trans. Nucl. Sci.

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We present a compact, configurable scintillation camera employing a maximum of 16 individual 64-pixel imaging modules resulting in a 1024-pixel camera covering an area of 9.6 cm 9.6 cm. The 64-pixel imaging module consists of optically isolated 3 mm 3 mm 5 mm CsI(Tl) crystals coupled to a custom array of Si p-i-n photodiodes read out by a custom integrated circuit (IC). Each imaging module plugs into a readout motherboard that controls the modules and interfaces with a data acquisition card inside a computer. For a given event, the motherboard employs a custom winner-take-all IC to identify the module with the largest analog output and to enable the output address bits of the corresponding module's readout IC. These address bits identify the "winner" pixel within the "winner" module. The peak of the largest analog signal is found and held using a peak detect circuit, after which it is acquired by an analog-to-digital converter on the data acquisition card. The camera is currently operated with four imaging modules in order to characterize its performance. At room temperature, the camera demonstrates an average energy resolution of 13.4% full-width at half-maximum (FWHM) for the 140-keV emissions of 99 Tc. The system spatial resolution is measured using a capillary tube with an inner diameter of 0.7 mm and located 10 cm from the face of the collimator. Images of the line source in air exhibit average system spatial resolutions of 8.7-and 11.2-mm FWHM when using an all-purpose and high-sensitivity parallel hexagonal holes collimator, respectively. These values do not change significantly when an acrylic scattering block is placed between the line source and the camera.Index Terms-Compact gamma camera, low-noise integrated circuit readout, photodiode array, pixellated scintillator, scintimammography.

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“…Bertuccio et al [14] adopted a current-mode approach to design a first-order LPF avoiding the use of operational amplifiers that result in a very compact topology. Pedrali-Noy et al [15] presented an alternative design using operational transconductance amplifiers (OTAs) in order to provide an integrated S-G shaper with programmable characteristics. The specific topology was basically a two-stage g m -C filter.…”

Section: Introductionmentioning

confidence: 99%