Dual-energy imaging using a digital scanned multi-slit system for mammography: evaluation of a differential beam filtering technique - art. no. 61422O
2006 (English)In: Medical Imaging 2006: Physics of Medical Imaging, Pts 1-3 / [ed] Flynn, MJ; Hsieh, J, BELLINGHAM, WA: SPIE-INT SOC OPTICAL ENGINEERING , 2006, Vol. 6142, O1422-O1422 p.Conference paper (Refereed)
This paper describes a method for single exposure contrast-enhanced dual-energy imaging of tumors utilizing a scanned multi-slit system for digital mammography. This photon counting system employs an array of silicon strip detectors in an edge-on geometry. In the multi-slit setup, the line detectors and pre-collimator slits are aligned orthogonal to the scan direction. This geometry is advantageous to dual-energy imaging, since it allows differential filtering of the x-ray beam in the pre-collimator slits. A high-energy image is constructed from those lines where the filter material has been chosen to harden the x-ray beam and the low-energy image from the lines with a filter producing softer beams. Both images are obtained in the same scan, eliminating the need to change tube voltages and anode materials and minimizing the risk of motion artifacts. The method is illustrated on a purpose-built phantom and logarithmic subtraction of the images produces images essentially free of anatomical clutter with the contrast-enhanced targets clearly visible.
Place, publisher, year, edition, pages
BELLINGHAM, WA: SPIE-INT SOC OPTICAL ENGINEERING , 2006. Vol. 6142, O1422-O1422 p.
, PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE), ISSN 0277-786X ; 6142
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-42103DOI: 10.1117/12.649513ISI: 000238049700094ScopusID: 2-s2.0-33745352483ISBN: 0-8194-6185-7OAI: oai:DiVA.org:kth-42103DiVA: diva2:446081
Medical Imaging 2006 Conference. San Diego, CA. FEB 12-14, 2006
QC 201110062011-10-062011-10-052011-10-06Bibliographically approved