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

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Abstract

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 collimator and a custom alignment device. A comparison with the attenuation curves and the half value layer values, obtained from the measured and simulated spectra, from an ionization chamber and from a solid state dosimeter, also shows the accuracy of the measurements. These results make the proposed detection system a very attractive tool for both laboratory research, calibration of dosimeters and advanced quality controls in mammography.
Lingua originaleEnglish
pagine (da-a)8390-8404
Numero di pagine15
RivistaSensors
Volume12
Stato di pubblicazionePublished - 2012

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Mammography
Dosimeters
X-Rays
X ray tubes
Detectors
X rays
Ionization chambers
Molybdenum
Research laboratories
Processing
X ray spectroscopy
Full width at half maximum
dosimeters
Quality control
x rays
Photons
pulses
Calibration
detectors
pinholes

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Electrical and Electronic Engineering
  • Instrumentation
  • Biochemistry
  • Atomic and Molecular Physics, and Optics

Cita questo

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title = "Direct Measurement of Mammographic X-Ray Spectra with a Digital CdTe Detection System",
abstract = "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 collimator and a custom alignment device. A comparison with the attenuation curves and the half value layer values, obtained from the measured and simulated spectra, from an ionization chamber and from a solid state dosimeter, also shows the accuracy of the measurements. These results make the proposed detection system a very attractive tool for both laboratory research, calibration of dosimeters and advanced quality controls in mammography.",
keywords = "X-ray spectroscopy; high photon counting rate; CdTe detectors; digital pulse processing; mammography",
author = "Gaetano Gerardi and Giuseppe Raso and Fabio Principato and Leonardo Abbene and {Del Sordo}, Stefano",
year = "2012",
language = "English",
volume = "12",
pages = "8390--8404",
journal = "Sensors",
issn = "1424-3210",
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TY - JOUR

T1 - Direct Measurement of Mammographic X-Ray Spectra with a Digital CdTe Detection System

AU - Gerardi, Gaetano

AU - Raso, Giuseppe

AU - Principato, Fabio

AU - Abbene, Leonardo

AU - Del Sordo, Stefano

PY - 2012

Y1 - 2012

N2 - 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 collimator and a custom alignment device. A comparison with the attenuation curves and the half value layer values, obtained from the measured and simulated spectra, from an ionization chamber and from a solid state dosimeter, also shows the accuracy of the measurements. These results make the proposed detection system a very attractive tool for both laboratory research, calibration of dosimeters and advanced quality controls in mammography.

AB - 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 collimator and a custom alignment device. A comparison with the attenuation curves and the half value layer values, obtained from the measured and simulated spectra, from an ionization chamber and from a solid state dosimeter, also shows the accuracy of the measurements. These results make the proposed detection system a very attractive tool for both laboratory research, calibration of dosimeters and advanced quality controls in mammography.

KW - X-ray spectroscopy; high photon counting rate; CdTe detectors; digital pulse processing; mammography

UR - http://hdl.handle.net/10447/63362

M3 - Article

VL - 12

SP - 8390

EP - 8404

JO - Sensors

JF - Sensors

SN - 1424-3210

ER -