TY  - JOUR
AU  - Feldkamp, J.M.
AU  - Schroer, C. G.
AU  - Patommel, J.
AU  - Lengeler, B.
AU  - Günzler, T. F.
AU  - Schweitzer, M.
AU  - Stenzel, C.
AU  - Dieckmann, M.
AU  - Schröder, W. H.
TI  - A compact X-ray microtomography system for element mapping and absorption imaging
JO  - Review of scientific instruments
VL  - 78
SN  - 0034-6748
CY  - [S.l.]
PB  - American Institute of Physics
M1  - PreJuSER-56259
SP  - 073702-01 - 077302-8
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - Absorptiometry, Photon: instrumentation
KW  - Absorptiometry, Photon: methods
KW  - Equipment Design
KW  - Equipment Failure Analysis
KW  - Miniaturization
KW  - Reproducibility of Results
KW  - Sensitivity and Specificity
KW  - Tomography, X-Ray: instrumentation
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:17672761
UR  - <Go to ISI:>//WOS:000248486300031
DO  - DOI:10.1063/1.2751094
UR  - https://juser.fz-juelich.de/record/56259
ER  -