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  • Electronic Resource  (2)
  • Action potential  (1)
  • Key words: Liver CT—Bile duct neoplasm—Peripheral cholangiocarcinoma—Cystic tumor of liver—Bile duct neoplasm, ERCP.  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Intraductal mucosal-spreading mucin-producing peripheral cholangiocarcinoma of the liver (2000)
    Springer
    Abdominal imaging 25 (2000), S. 89-92 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Liver CT—Bile duct neoplasm—Peripheral cholangiocarcinoma—Cystic tumor of liver—Bile duct neoplasm, ERCP.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The computed tomographic (CT) appearance of a case of intraductal mucosal-spreading mucin-producing peripheral cholangiocarcinoma of the liver is described in a patient presenting with acute pericardial tamponade due to rupture of the cystically dilated left intrahepatic ducts by mucin hypersecretion. CT showed cystic and tubular dilatation of the intrahepatic ducts of the left and caudate lobes, but there was no grossly visible tumor mass. Pathology showed a single layer of tall columnar tumor cells with short intraluminal papillary projections lining each bile duct; the ducts were markedly dilated because of excessive mucin secretion. There was no gross tumor mass in the bile ducts. The tumor spread diffusely and contiguously along the intrahepatic bile ducts, with minimal invasion to the bile duct wall. To our knowledge, there has been no report about mucosal-spreading peripheral cholangiocarcinoma of the liver.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/s002619910018
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Radial decline of the extracellular action potential (1984)
    Springer
    Medical & biological engineering & computing 22 (1984), S. 564-568 
    Details
    ISSN: 1741-0444
    Keywords: Action potential ; Computer simulations ; Electrical characteristics ; Low pass filters ; Radial decline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A modified line source model presented earlier has been used to study the decline of the extracellular single muscle fibre action potential. The muscle tissue is modelled as a low-pass filter. The transfer function of the filter declines more slowly than a first order low-pass filter at low frequencies, but much faster at high frequencies. The cutoff frequency of the filter increases when the anisotropy of the muscle decreases. It also increases proportionally with the propagation velocity of the action potential. The decline of different frequency components obtained from the modified line source volume conductor and a filter model derived from experimental measurements are compared and their differences explained. The modified line source model was found to be identical to the volume conductor model in terms of results and at the same time conceptually simple for applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02443871
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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