NDLI: Quantitative CT characterization of body fluids with spectral ρZ projection method

Content Provider	IEEE Xplore Digital Library
Author	Heismann, B.J. Mahnken, A.H.
Copyright Year	2006
Description	Author affiliation: Div. of Computed Tomography, Siemens Med., Forchheim (Heismann, B.J.)
Abstract	We have performed a clinical study on the characterization of body fluids with the spectral ρZ projection algorithm. It converts dual-energy CT scans into density ρ and atomic number Z information. We provide data on a total of 56 samples of 6 different classes. Blood, gall, pus and urine, as well as mixtures of blood + pus and blood + ethylendiamintetra acetate (EDTA, a blood anti-coagulant) have been investigated. For standard measurements with 80 kV and 140 kV tube voltages we encounter larger overlaps of the HU attenuation values. Gall fluid and pus are the only distinguishable substances. For the ρZ projected image data, we find blood, pus and the blood + pus mixtures to be clearly distinguishable in the two-dimensional ρZ plane. Gall fluid shows a small overlap to pus. The density and the atomic number values have standard deviations in the order of Δρ = 10 $mg/cm^{3}$ and ΔZ = 0.1. The theoretical density and atomic number values for blood and water are reproduced with very small deviations in the range of Δρ = -20 $mg/cm^{3}$ and ΔZ = 0.02.
Starting Page	2079
Ending Page	2080
File Size	2156087
Page Count	2
File Format	PDF
ISBN	1424405602
ISSN	10957863
DOI	10.1109/NSSMIC.2006.354323
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computed tomography Blood Atomic measurements Attenuation measurement Biological materials X-ray imaging Density measurement X-ray scattering Projection algorithms Measurement standards
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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