Next Article in Journal
Evaluation of Complexation Ability Using a Sensor Electrode Chip Equipped with a Wireless Screening System
Next Article in Special Issue
Microfiber-Based Bragg Gratings for Sensing Applications: A Review
Previous Article in Journal
Fiber Optic-Based Refractive Index Sensing at INESC Porto
Previous Article in Special Issue
A Miniature Integrated Multimodal Sensor for Measuring pH, EC and Temperature for Precision Agriculture
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,* , 1
,
1
,
2
 and
1
1 Dipartimento di Fisica, Università di Palermo,Viale delle Scienze, Edificio 18, Palermo 90128, Italy 2 INAF/IASF Palermo, Via Ugo La Malfa 153, Palermo 90146, Italy
* Author to whom correspondence should be addressed.
Received: 8 May 2012 / Revised: 11 June 2012 / Accepted: 12 June 2012 / Published: 18 June 2012
(This article belongs to the Special Issue Ultra-Small Sensor Systems and Components)
View Full-Text   |   Download PDF [487 KB, uploaded 21 June 2014]   |   Browse Figures

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 X-ray spectroscopy; high photon counting rate; CdTe detectors; digital pulse processing; mammography
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
SciFeed

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
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.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert