25-27 November 2015
National Centre for Synchrotron Science
Australia/Melbourne timezone

Combining SR Computed Tomography and Fluoresence X-Ray Computed Tomography

25 Nov 2015, 14:30
Conference Rooms ()

Conference Rooms

Oral Imaging Imaging I


Dr Chris Hall (Australian Synchrotron)


An x-ray image highlighting technique which might prove more sensitive than simple attenuation alteration, is imaging the x-ray fluorescence from specific markers. This technique is exploited to great effect on x-ray fluorescence microscopy beam lines like our XFM facility. On IMBL we would like to develop a lower resolution, but wider field of view method of reconstructing 3-D fluorescence imaging compatible with SRCT. A beam modulation technique has been proposed previously to allow fluorescence CT (FXCT) and SRCT data to be collected simultaneously [1]. This work resulted in some proof of concept modelling and a simple experiment test system. Since seminal papers on the subject were published in 2008, there has been significant activity around Compressive Sensing (CS). Ideas in CS have been proven for imaging at optical and infra-red wavelengths. CS has also caused a lot of excitement in the medical imaging community. However, to date not much has been published on using CS techniques in SR x-ray imaging. We believe CS imaging techniques suit IMBL and may overcome the issues in combining SRCT and FXCT. We present some recent data, and model outputs which demonstrate the reconstruction of low resolution iodine fluorescence maps of realistic phantoms from data collected with a single point detector during a CT scan on IMBL. [1] - C. Hall, ‘Combined x-ray fluorescence and absorption computed tomography using a synchrotron beam’, 2013, Journal of Instrumentation. doi:10.1088/1748-0221/8/06/C06007
Keywords X-ray fluoresence CT, x-ray compressive sensing imaging

Primary author

Dr Chris Hall (Australian Synchrotron)


Mr Alex Winnett (Swinburne University of Technology) Prof. Feng Wang (Swinburne University of Technology) Robert Acres (Australian Synchrotron)

Presentation Materials

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