Proceedings ArticleDOI
Dose reduction in mammography with photon counting imaging
Stefan Thunberg,Leif Adelow,Ola Blom,Anders Coster,Johan Egerstrom,Mathias Eklund,Per Egnell,Tom Francke,Ulf Jordung,Tomas Kristoffersson,Karin Lindman,Lars Lindqvist,Daniel Marchal,Hans Olla,Erik Penton,Vladimir Peskov,Juha Rantanen,Skiff Sokolov,Per Svedenhag,Christer Ullberg,N. Weber +20 more
- Vol. 5368, Iss: 1, pp 457-465
Reads0
Chats0
TLDR
Investigation of glandular dose to the breast in mammography can significantly be reduced without compromising image quality, when using photon counting technology, in a multi-slit scanning photon counting detector, compared to a conventional film mammography system and commercial available digital mammography systems with TFT-array detectors.Abstract:
The purpose of this study was to investigate if the glandular dose to the breast in mammography can significantly be reduced without compromising image quality, when using photon counting technology, in a multi-slit scanning photon counting detector, compared to a conventional film mammography system and commercial available digital
mammography systems with TFT-array detectors. A CDMAM phantom study, with two different thicknesses of additional PMMA absorber, 4 cm and 7 cm respectively, has shown that multi-slit scanning photon counting detector technology can reduce the dose, without reducing the image quality. This comparison was made to two commercial available digital mammography systems Senographe 2000D (from GEMS) and Selenia (from Lorad). The results show that dose can be reduced with 63% to 77%, depending on object thickness, when using XCT for mammography. This dose reduction has also been verified clinically through a small pilot study with patients and specimen, where the comparison was made between XCT and film.read more
Citations
More filters
Journal ArticleDOI
Beam hardening artefacts in computed tomography with photon counting, charge integrating and energy weighting detectors: a simulation study.
TL;DR: This work represents the first comparative evaluation of the effect of photon counting, charge integrating and energy weighting photon detectors on beam hardening artefacts in CT.
Journal ArticleDOI
Photon counting multienergy x-ray imaging: effect of the characteristic x rays on detector performance.
TL;DR: Investigation of the effect of characteristic x rays on the performance of photon counting detectors for multienergy x-ray imaging found that characteristic x ray escape deteriorates energy and spatial resolution, particularly for small pixel sizes.
Journal ArticleDOI
Tilted angle CZT detector for photon counting/energy weighting x-ray and CT imaging
TL;DR: A tilted angle CZT detector is proposed in this work for applications in photon counting/energy weighting x-ray and CT imaging and provides higher spatial and energy resolution, and shorter charge collection time, which potentially enables fast energy resolving x-rays imaging.
Journal ArticleDOI
Spectral and dual-energy X-ray imaging for medical applications
TL;DR: Spectral imaging is an umbrella term for energy-resolved X-ray imaging in medicine as mentioned in this paper, which makes use of the energy dependence of Xray attenuation to either increase the contrast-to-noise ratio, or to provide quantitative image data and reduce image artefacts by so-called material decomposition.
Journal ArticleDOI
Projection x-ray imaging with photon energy weighting: experimental evaluation with a prototype detector.
TL;DR: X-ray energy weighting was applied to low- and high-energy images prior to subtraction, and this improved the SNR of calcifications and iodine in dual energy subtracted images by a factor of 1.34 and 1.25, respectively, as compared to charge integrating.
References
More filters
Journal ArticleDOI
Additional factors for the estimation of mean glandular breast dose using the UK mammography dosimetry protocol
TL;DR: The UK and European protocols for mammographic dosimetry use conversion factors that relate incident air kerma to the mean glandular dose (MGD) within the breast as discussed by the authors.
Journal ArticleDOI
Monte Carlo calculation of conversion factors for the estimation of mean glandular breast dose.
TL;DR: The IPSM report on the commissioning and routine testing of mammographic x-ray systems recommends that breast dose be specified as the mean dose to the glandular tissues within the breast and gives the size and compositions of a standard breast phantom for the comparison of doses.
Journal ArticleDOI
Scatter/primary in mammography: comprehensive results.
TL;DR: Monte Carlo procedures using the SIERRA code were used to investigate the scatter properties in mammography and the scatter to primary ratio (SPR) was used for quantifying scatter levels as a function of beam spectrum, position in the field, air gap, breast thickness, tissue composition, and the area of the field of view (FOV).
Proceedings ArticleDOI
Evaluation of a photon-counting mammography system
Stefan Thunberg,Tom Francke,Johan Egerstrom,Mathias Eklund,Leif Ericsson,Thomas Kristoffersson,Vladimir Peskov,Juha Rantanen,Skiff Sokolov,Per Svedenhag,Christer Ullberg,N. Weber +11 more
TL;DR: In this paper, a novel technique for high resolution digital X-ray imaging, using gaseous avalanche detectors for photon counting with high signal-to-noise ratios for single Xray photons, has been developed.