Search results for " high photon counting rate"

showing 3 items of 3 documents

Direct Measurement of Mammographic X-Ray Spectra with a Digital CdTe Detection System

2012

In this work we present a detection system, based on a CdTe detector and an innovative digital pulse processing (DPP) system, for high-rate X-ray spectroscopy in mammography (1–30 keV). The DPP system performs a height and shape analysis of the detector pulses, sampled and digitized by a 14-bit, 100 MHz ADC. We show the results of the characterization of the detection system both at low and high photon counting rates by using monoenergetic X-ray sources and a nonclinical X-ray tube. The detection system exhibits excellent performance up to 830 kcps with an energy resolution of 4.5% FWHM at 22.1 keV. Direct measurements of clinical molybdenum X-ray spectra were carried out by using a pinhole…

digital pulse processingmammographyAnalytical chemistrylcsh:Chemical technologyBiochemistryArticleAnalytical ChemistryCdTe detectorsCdTe detectorOpticsmedicineCadmium CompoundsMammographylcsh:TP1-1185Computer SimulationElectrical and Electronic EngineeringInstrumentationPhysicsDosimetermedicine.diagnostic_testbusiness.industryAttenuationSpectrum AnalysisX-RaysDetectorSettore FIS/01 - Fisica Sperimentalehigh photon counting rateCdTe detectors Digital Pulse Processing MammographySignal Processing Computer-AssistedAtomic and Molecular Physics and OpticsPhoton countingSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Full width at half maximumX-ray spectroscopy; high photon counting rate; CdTe detectors; digital pulse processing; mammographyIonization chamberX-ray spectroscopyTelluriumbusinessHalf-value layerSensors; Volume 12; Issue 6; Pages: 8390-8404
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High-rate x-ray spectroscopy in mammography with a CdTe detector: A digital pulse processing approach

2010

Purpose:Direct measurement of mammographic x-ray spectra under clinical conditions is a difficult task due to the high fluence rate of the x-ray beams as well as the limits in the development of high resolution detection systems in a high counting rate environment. In this work we present a detection system, based on a CdTe detector and an innovative digital pulse processing (DPP) system, for high-rate x-ray spectroscopy in mammography. Methods: The DPP system performs a digital pile-up inspection and a digital pulse height analysis of the detector signals, digitized through a 14-bit, 100 MHz digitizer, for x-ray spectroscopy even at high photon counting rates. We investigated on the respon…

x-ray spectroscopy CdTe detectors high photon counting rate digital pulse processing mammography
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Digital techniques for high-rate high-resolution radiation measurements

2014

Digital pulse processing (DPP) techniques are increasingly used in the development of modern spectroscopic systems. DPP systems, based on direct digitizing and processing of detector signals (preamplifier output signals), ensure higher flexibility, stability, lower dead time, higher throughput and better energy resolution than traditional pulse processing systems. In this work, we present our progress in the development of DPP systems for high-rate high-resolution radiation measurements. An innovative digital system, able to perform multi-parameter analysis (input counting rate, pulse height, pulse shape, event arrival time, etc.) even at high photon counting rates is presented. Experimenta…

EngineeringPixelPulse (signal processing)business.industryPreamplifierDetectorSettore FIS/01 - Fisica SperimentaleDead timePhoton countingDigital Pulse processing High photon counting rate semiconductor detectorsSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)OpticsElectronic engineeringbusinessThroughput (business)Energy (signal processing)
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