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Observer-model optimization of X-ray system in photon-counting breast imaging
KTH, School of Engineering Sciences (SCI), Physics, Medical Imaging.
KTH, School of Engineering Sciences (SCI), Physics, Medical Imaging.
Sectra Mamea AB, Solna, Sweden.
Sectra Mamea AB, Solna, Sweden.
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2011 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 648, no Supplement 1, S54-S57 p.Article in journal (Refereed) Published
Abstract [en]

An ideal-observer model is applied to optimize the design of an X-ray tube intended for use in a multi-slit scanning photon-counting mammography system. The design is such that the anode and the heel effect are reversed and the projected focal spot is smallest at the chest wall. Using linear systems theory, detectability and dose efficiency for a 0.1-mm disk are calculated for different focal spot sizes and anode angles. It is shown that the image acquisition time can be reduced by about 25% with spatial resolution and dose efficiency improved near the chest wall and worsened further away. The image quality is significantly more homogeneous than for the conventional anode orientation, both with respect to noise and detectability of a small object. With the tube rotated 90°, dose efficiency can be improved by 20% for a fixed image acquisition time. 

Place, publisher, year, edition, pages
2011. Vol. 648, no Supplement 1, S54-S57 p.
Keyword [en]
Observer model, Scanning, Mammography, X-ray tube, Optimization
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Identifiers
URN: urn:nbn:se:kth:diva-86538DOI: 10.1016/j.nima.2010.12.195ISI: 000305376900015Scopus ID: 2-s2.0-79960841057OAI: oai:DiVA.org:kth-86538DiVA: diva2:500810
Note
QC 20120215Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2017-12-07Bibliographically approved

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