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  • 1
    Electronic Resource
    Electronic Resource
    Correlation of dynamic contrast-enhanced magnetic resonance imaging with histologic tumor grade: comparison of macromolecular and small-molecular contrast media (1998)
    Springer
    Pediatric radiology 28 (1998), S. 67-78 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background. The endothelial integrity of microvessels is disrupted in malignant tumors. Quantitative assays of tumor microvascular characteristics based on dynamic magnetic resonance imaging (MRI) were correlated with histopathologic grade in mammary soft tissue tumors. Materials and methods. A spectrum of tumors, benign through highly malignant, was induced in 33 female rats by administration of N -ethyl-N -nitrosourea (ENU), a potent carcinogen. Dynamic contrast-enhanced MRI was performed using a small-molecular contrast medium [gadopentetate, MW = 0.5 kDa] and a macromolecular contrast medium [albumin-(Gd-DTPA)30, MW = 92 kDa] at an interval of 1–2 days. Permeability surface area product (PS), as estimated by the corresponding endothelial transfer coefficient (KPS), and fractional plasma volume (fPV) were calculated for each tumor and each contrast agent using a two-compartment bi-directional kinetic model. MRI microvascular characteristics were correlated with histopathologic tumor grade. Results. Tumor permeability to macromolecular contrast medium, characterized by KPS, showed a highly positive correlation with tumor grade (r 2 = 0.76, P 〈 10− 10). KPS values were zero for all benign and some low-grade carcinomas, greater than zero in all other carcinomas, and increased in magnitude with higher tumor grade. A considerably smaller but significantly positive correlation was found between fPV and tumor grade using macromolecular contrast medium (r 2 = 0.25, P 〈 0.003). No correlation between KPS or fPV values and tumor grade was found using gadopentetate (r 2 = 0.01, P 〉 0.95 and r 2 = 0.03, P 〉 0.15, respectively). Conclusion. Quantitative tumor microvascular permeability assays generated with macromolecular MRI contrast medium correlate closely with histologic tumor grade. No significant correlation is found using small-molecular gadopentetate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002470050296
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    Paper (German National Licenses)
    Fulltext
  • 2
    Online Resource
    Online Resource
    Cartilage Imaging (2011)
    New York, NY :Springer Science+Business Media, LLC,
    Details
    Title: Cartilage Imaging
    Contributer: Link, Thomas M.
    Publisher: New York, NY :Springer Science+Business Media, LLC,
    Year of publication: 2011
    Pages: v.: digital , Online-Ressource
    ISBN: 978-1-441-98438-8 , 978-1-441-98437-1
    Type of Medium: Online Resource
    Language: English
    Parallel Title: Significance, Techniques, and New Developments
    Parallel Title: Electronic reproduction; Available via World Wide Web
    URL: http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=371117&site=ehost-live
    Library Location Call Number Volume/Issue/Year Availability
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    ZIB Catalog
    Zuse Institute Berlin
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