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Scatter-free breast imaging using a monochromator coupled to a pixellated spectroscopic detector

Green, FH, Veale, MC, Wilson, MD, Seller, P, Scuffham, J and Pani, S (2015) Scatter-free breast imaging using a monochromator coupled to a pixellated spectroscopic detector In: Conference on Medical Imaging - Physics of Medical Imaging, 2015-02-22 - 2015-02-25, Orlando, FL.

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Abstract

This project uses the combination of a spectroscopic detector and a monochromator to produce scatter free images for use in mammography. Reducing scatter is vital in mammography, where typical structures have either low contrast or small dimensions. The typical method to reduce scatter is the anti-scatter grid, which has the drawback of absorbing a fraction of the primary beam as well as scattered radiation. An increase in the dose is then required in order to compensate. Compton-scattered X-rays have lower energy than the primary beam. When using a monochromatic beam and a spectroscopic detector the scattered beam will appear at lower energies than the primary beam in the detected spectrum. Therefore if the spectrum of the detected X-rays is available, the scattered component can be windowed out of the spectrum, essentially producing a scatter free image. The monochromator used in this study is made from a Highly Orientated Pyrolytic Graphite (HOPG) crystal with a mosaic spread of 0.4°±0.1°. The detector is a pixellated spectroscopic detector that is made from a 2 cm x 2 cm x 0.1 cm CdTe crystal with a pixel pitch of 250 μm and an energy resolution of 0.8 keV at 59.5 keV. This work presents the characterisation of the monochromator and initial imaging data. The work shows a contrast increase of 20% with the removal of the low energy Compton scattered X-rays. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Green, FHUNSPECIFIEDUNSPECIFIED
Veale, MCUNSPECIFIEDUNSPECIFIED
Wilson, MDUNSPECIFIEDUNSPECIFIED
Seller, PUNSPECIFIEDUNSPECIFIED
Scuffham, JUNSPECIFIEDUNSPECIFIED
Pani, SUNSPECIFIEDUNSPECIFIED
Date : 18 March 2015
Identification Number : 10.1117/12.2081914
Contributors :
ContributionNameEmailORCID
EditorHoeschen, CUNSPECIFIEDUNSPECIFIED
EditorKontos, DUNSPECIFIEDUNSPECIFIED
PublisherSPIE-INT SOC OPTICAL ENGINEERING, UNSPECIFIEDUNSPECIFIED
Uncontrolled Keywords : Science & Technology, Physical Sciences, Life Sciences & Biomedicine, Optics, Physics, Applied, Radiology, Nuclear Medicine & Medical Imaging, Physics, Monochromatic X-rays, Mammography, Scatter removal, Spectroscopic Detector
Related URLs :
Additional Information : Copyright 2015 (year) Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Depositing User : Symplectic Elements
Date Deposited : 14 Oct 2015 15:09
Last Modified : 14 Oct 2015 15:09
URI: http://epubs.surrey.ac.uk/id/eprint/808900

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