Journal ArticleDOI
Variable sampling-time technique for improving count rate performance of scintillation detectors
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TLDR
In this article, a new technique is presented to improve the count rate capability of a scintillation spectrometer or a position sensitive detector with minimum loss of resolution, which is based on the combination of pulse shortening and selective integration in which the integration period is not fixed but shortened by the arrival of the following pulse.About:
This article is published in Nuclear Instruments and Methods.The article was published on 1979-01-01. It has received 31 citations till now. The article focuses on the topics: Scintillation & Detector.read more
Citations
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Method and apparatus to prevent signal pile-up
TL;DR: In this article, an analog filter may be applied to reduce noise, and/or digital integration may be used during data processing to avoid pileup in conjunction with several types of applications including multi-zone detector applications and coincidence detection applications.
Journal ArticleDOI
Evemt Localization in a Continuous Scintillation Detector Using Digital Processing
TL;DR: In this article, a two-dimensional position-sensitive PET detector was used in a multi-slice PET scanner, where the pulses are shortened and integrated for 240 nsec, which results in a countrate capability of up to 1 Mcps without significant loss of spatial resolution.
Journal ArticleDOI
On nuclear spectrometry pulses digital shaping and processing
TL;DR: In this paper, a trapezoidal shape is used for time and/or pulse-height spectra measurements from high counting rate sources, which commonly implies pulse pile up, and the amplitude-arrival time measurement of piled up pulses by the trapezoid shape is simpler than by both maximum likelihood and least squares estimators, or adaptive nonlinear least squares methods which give better results in the case of severe pile up.
Proceedings ArticleDOI
Performance characteristics of a dual head SPECT scanner with PET capability
TL;DR: The goal of the present investigation is to develop an ECT scanner which provides the same performance achieved with present SPECT scanners when operated as a SPECT system for imaging single photon emitters and which provides clearly superior performance to a 511 keV collimated SPECT scanner when operated in the coincidence mode.
Journal ArticleDOI
The high count rate performance of a two-dimensionally position-sensitive detector for positron emission tomography.
TL;DR: The detector's count rate capability enables the PENN-PET tomograph to handle most current imaging protocols, and the mechanisms by which pulse pile-up distorts the high count rate PSF were investigated using computer simulations.
References
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Journal ArticleDOI
Performance Parameters of a Positron Imaging Camera
TL;DR: In this article, two Anger scintillation cameras have been combined into a positron imaging system with high sensitivity (200 cts/sec/?Ci), high resolution (system resolution less than 10 mm FWHM) and useful clinical count rates up to 8000 cts /sec.
Journal Article
Scintillation Cameras Based on New Position Arithmetics
Journal ArticleDOI
Photomultiplier single-electron statistics and the shape of the ideal scintillation line
TL;DR: In this article, the contribution of the photomultiplier noise of single electrons from the photocathode is discussed, and it is shown that although the overall resolution depends sensitively on the frequency distribution of singleelectron pulses, a statistical model can be formulated which leads to an expression for the shape of the ideal scintillation line.
Journal ArticleDOI
Improved Timing with NaI(Tl)
TL;DR: In this paper, the earliest component of the anode current pulse of the photomultiplier was used to estimate the mean life of the scintillation and the average number of photoelectrons per event.
Journal ArticleDOI
Elimination of pulse pileup distortion in nuclear radiation spectra
TL;DR: In this paper, a fast logic system was developed to remove the spectrum distortions produced by piled-up pulses by rejecting the piled up pulses. But this system was not suitable for the counting of nuclear radiations.
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