%0 Journal Article
%A Feldkamp, J.M.
%A Schroer, C. G.
%A Patommel, J.
%A Lengeler, B.
%A Günzler, T. F.
%A Schweitzer, M.
%A Stenzel, C.
%A Dieckmann, M.
%A Schröder, W. H.
%T A compact X-ray microtomography system for element mapping and absorption imaging
%J Review of scientific instruments
%V 78
%@ 0034-6748
%C [S.l.]
%I American Institute of Physics
%M PreJuSER-56259
%P 073702-01 - 077302-8
%D 2007
%Z Record converted from VDB: 12.11.2012
%X We have designed and built a compact x-ray microtomography system to perform element mapping and absorption imaging by exploiting scanning fluorescence tomography and full-field transmission microtomography, respectively. It is based on a low power microfocus tube and is potentially appropriate for x-ray diagnostics in space. Full-field transmission tomography yields the three-dimensional inner structure of an object. Fluorescence microtomography provides the element distribution on a virtual section through the sample. Both techniques can be combined for appropriate samples. Microradiography as well as fluorescence mapping are also possible. For fluorescence microtomography a small and intensive microbeam is required. It is generated using a polycapillary optic. Operating the microfocus tube with a molybdenum target at 12 W, a microbeam with a full width at half maximum lateral extension of 16 microm and a flux of about 10(8) photonss is generated. As an example of application, this beam is used to determine the element distribution inside dried plant samples. For full-field scanning tomography, the x-ray optic is removed and the sample is imaged in magnifying projection onto a two-dimensional position sensitive detector. Depending on the sample size, a spatial resolution down to about 10 microm is possible in this mode. The method is demonstrated by three-dimensional imaging of a rat humerus.
%K Absorptiometry, Photon: instrumentation
%K Absorptiometry, Photon: methods
%K Equipment Design
%K Equipment Failure Analysis
%K Miniaturization
%K Reproducibility of Results
%K Sensitivity and Specificity
%K Tomography, X-Ray: instrumentation
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:17672761
%U <Go to ISI:>//WOS:000248486300031
%R 10.1063/1.2751094
%U https://juser.fz-juelich.de/record/56259