Sensors 2012, 12(6), 8390-8404; doi:10.3390/s120608390
Article

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

1,* email, 1email, 1email, 2email and 1email
Received: 8 May 2012; in revised form: 11 June 2012 / Accepted: 12 June 2012 / Published: 18 June 2012
(This article belongs to the Special Issue Ultra-Small Sensor Systems and Components)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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
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MDPI and ACS Style

Abbene, L.; Gerardi, G.; Principato, F.; Del Sordo, S.; Raso, G. Direct Measurement of Mammographic X-Ray Spectra with a Digital CdTe Detection System. Sensors 2012, 12, 8390-8404.

AMA Style

Abbene L, Gerardi G, Principato F, Del Sordo S, Raso G. Direct Measurement of Mammographic X-Ray Spectra with a Digital CdTe Detection System. Sensors. 2012; 12(6):8390-8404.

Chicago/Turabian Style

Abbene, Leonardo; Gerardi, Gaetano; Principato, Fabio; Del Sordo, Stefano; Raso, Giuseppe. 2012. "Direct Measurement of Mammographic X-Ray Spectra with a Digital CdTe Detection System." Sensors 12, no. 6: 8390-8404.


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