Some aspects involving the use of CdTe for finding end-point energies in diagnostic radiology

Krmar, M.; Shukla, Shailendra S.; Ganezer, K. S.

doi:10.1016/j.apradiso.2005.11.011

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…Figure 5 shows no significative variation of the calculated tube voltage values (relative errors less than 0.22%, with confidence level of 68%) up to 390 kcps. This result points out the ability of the system to perform peak voltage measurements with high precision even at high rates, contrary to what happen using standard systems [36]. …”

Section: Resultsmentioning

confidence: 97%

“…Small changes in peak voltages can produce significant modifications of the absorbed dose and image contrast. As proposed in several works [4,35,36], it is possible to perform precise estimations of peak voltage through the end point energy of the measured spectra (non-invasive measurements). The tube voltage is obtained through the intersection point (in keV) of two straight lines, one for the background beyond the end point energy and the other for the final region of the spectrum.…”

Section: Methodsmentioning

confidence: 99%

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

Abbene

Gerardi

Principato

et al. 2012

Sensors

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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.

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Section: Resultsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

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

Abbene

Gerardi

Principato

et al. 2012

Sensors

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“…Detrapping current can cause limitations in response speed [13]. It reduces energy resolution and significantly shifts the energy calibration at high count rates [14]. X-ray spectra of diagnostic units can be reconstructed from spectra of Compton scattered photons [15,16].…”

Section: Introductionmentioning

confidence: 99%

Possible use of CdTe detectors in kVp monitoring of diagnostic X-ray tubes

Krmar

Bucalović

Baucal

et al. 2010

Nuclear Instruments and Methods in Physics Research Section A:

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It has been suggested that kVp of diagnostic X-ray devices (or maximal energy of x-ray photon spectra) should be monitored routinely; however a standardized noninvasive technique has yet to be developed and proposed. It is well known that the integral number of Compton scattered photons and the intensities of fluorescent x-ray lines registered after irradiation of some material by an x-ray beam are a function of the maximal beam energy. CdTe detectors have sufficient energy resolution to distinguish individual x-ray fluorescence lines and high efficiency for the photon energies in the diagnostic region. Our initial measurements have demonstrated that the different ratios of the integral number of Compton scattered photons and intensities of K and L fluorescent lines detected by CdTe detector are sensitive function of maximal photon energy and could be successfully applied for kVp monitoring.

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A high-resolution Schottky CdTe detector based spectrometric determination method of the kilovoltage applied to dental X-ray tubes

2009

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Some aspects involving the use of CdTe for finding end-point energies in diagnostic radiology

Cited by 5 publications

References 13 publications

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

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

Possible use of CdTe detectors in kVp monitoring of diagnostic X-ray tubes

A high-resolution Schottky CdTe detector based spectrometric determination method of the kilovoltage applied to dental X-ray tubes

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