MR imaging characterization of microvessels in experimental breast tumors by using a particulate contrast agent with histopathologic correlation.
MR imaging characterization of microvessels in experimental breast tumors by using a particulate contrast agent with histopathologic correlation.
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DOI：
10.1148/radiology.218.2.r01fe37562
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发表时间：
2001-02
期刊：
影响因子：
19.7
通讯作者：
K. Turetschek;S. Huber;E. Floyd;T. Helbich;T. Roberts;D. Shames;K. Tarlo;M. Wendland;R. Brasch-R.
中科院分区：
文献类型：
--
作者：
K. Turetschek;S. Huber;E. Floyd;T. Helbich;T. Roberts;D. Shames;K. Tarlo;M. Wendland;R. Brasch-R.
PURPOSE To define the diagnostic potential of magnetic resonance (MR) imaging enhanced with ultrasmall superparamagnetic iron oxide (USPIO) particles for the quantitative characterization of tumor microvasculature. MATERIALS AND METHODS NC100150 injection, a USPIO in clinical trials, and albumin-(Gd-DTPA)(30) were compared at MR imaging on sequential days in the same 19 rats with mammary tumors. Kinetic analysis of dynamic T1-weighted three-dimensional spoiled gradient-recalled imaging data with a two-compartment bidirectional model yielded MR imaging estimates of microvascular permeability (K(PS)) and fractional plasma volume (fPV) for each contrast medium. RESULTS Strongly positive and significant correlations were observed between MR imaging-derived K(PS )estimates and histologic tumor grade with either the soluble albumin-(Gd-DTPA)(30) (r = 0.88; P <.001) or larger particulate USPIO (r = 0.82; P <.001). A significant correlation (P <.05) was observed with each contrast medium between K(PS) and the histologic microvascular density (MVD), an angiogenesis indicator. Despite the considerable difference in molecule and particle sizes, no significant difference was observed in the MR imaging-derived mean permeability values generated with the two contrast media. CONCLUSION USPIO, a macromolecular particulate MR imaging contrast agent, can be applied successfully to characterize tumor microvessels in animals. USPIO-derived K(PS) correlated strongly with histopathologic tumor grade, MVD, and K(PS) values derived by using albumin-(Gd-DTPA)(30) in the same tumors.
