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  • 1
    Electronic Resource
    Electronic Resource
    MR cholangiopancreatography: comparison between half-Fourier acquisition single-shot turbo spin-echo and two-dimensional turbo spin-echo pulse sequences (1998)
    Springer
    Abdominal imaging 23 (1998), S. 398-403 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Bile ducts, MR—Magnetic resonance (MR), comparative studies—Magnetic resonance (MR), half-Fourier imaging.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: To compare half-Fourier acquisition single-shot turbo spin-echo (HASTE) magnetic resonance cholangiopancreatography (MRCP) with two-dimensional turbo spin-echo (2D TSE) MRCP for imaging pancreatobiliary diseases. Methods: Twenty-seven patients with biliary or pancreatic disease underwent MRCP on a 1.0-T scanner with a body phased-array coil. A T2-weighted HASTE sequence (18 s) and a T2-weighted 2D TSE sequence (45 s) were used during a breath-hold by the patient. The source images and maximum intensity projection images of both sequences were reviewed independently by two radiologists. Results: Motion artifacts were more severely pronounced with 2D TSE sequences than with HASTE sequences (p 〈 0.001). All obstructions and their sites were accurately identified with both sequences. Filling defects (calculi) in bile ducts were identified in all 22 segments (100%) with HASTE-MRCP, whereas calculi in 19 of 22 segments (86%) were identified with 2D TSE-MRCP (p= 0.25). Three missed sites on 2D TSE-MRCP were intrahepatic bile ducts. Conclusions: HASTE-MRCP is superior to 2D TSE-MRCP in terms of detecting motion artifacts and visualization of the pancreatic ducts. HASTE-MRCP is comparable to 2D TSE-MRCP for visualization of the biliary ducts and their obstruction and is superior to 2D TSE-MRCP for identification of calculi in intrahepatic bile ducts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900368
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Preparations and properties of polyurethane aqueous dispersion from uncatalyzed systems of H12MDI, PTAd/bisphenol A polyol, and DMPA (1991)
    Springer
    Colloid & polymer science 269 (1991), S. 889-894 
    Details
    ISSN: 1435-1536
    Keywords: Polyurethaneionomer ; H 12MDI ; PTAd ; DMPA ; particlesize ; mechanicalproperties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Aqueous dispersions of polyrethane (PU) containing ionic and nonionic hydrophilic segments were prepared in a prepolymer mixing process using substantial amount of solvent. The acid groups were neutralized with tertiary amine, and chain extension in aqueous media was carried out with triethylene tetramine. Average particle size and particle size distribution of the dispersion, and mechanical and viscoelastic properties of the emulsion cast films were determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00657305
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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