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- W2096469096 abstract "High-frequency ultrasound (HFU) offers a means of investigating biologic tissue at the microscopic level. High-frequency, three-dimensional (3-D) quantitative-ultrasound (QUS) methods were developed to characterize freshly-dissected lymph nodes of cancer patients. Three-dimensional ultrasound data were acquired from lymph nodes using a 25.6-MHz center-frequency transducer. Each node was inked prior to tissue fixation to recover orientation after sectioning for 3-D histologic evaluation. Backscattered echo signals were processed using 3-D cylindrical regions-of-interest to yield four QUS estimates associated with tissue microstructure (i.e., effective scatterer size, acoustic concentration, intercept and slope). QUS estimates were computed following established methods using two scattering models. In this study, 46 lymph nodes acquired from 27 patients diagnosed with colon cancer were processed. Results revealed that fully-metastatic nodes could be perfectly differentiated from cancer-free nodes using slope or scatterer-size estimates. Specifically, results indicated that metastatic nodes had an average effective scatterer size (i.e., 37.1 ± 1.7 μm) significantly larger (p < 0.05) than that in cancer-free nodes (i.e., 26 ± 3.3 μm). Therefore, the 3-D QUS methods could provide a useful means of identifying small metastatic foci in dissected lymph nodes that might not be detectable using current standard pathology procedures. (E-mail: [email protected])" @default.
- W2096469096 created "2016-06-24" @default.
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- W2096469096 date "2010-03-01" @default.
- W2096469096 modified "2023-10-14" @default.
- W2096469096 title "Three-Dimensional High-Frequency Characterization of Cancerous Lymph Nodes" @default.
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- W2096469096 doi "https://doi.org/10.1016/j.ultrasmedbio.2009.10.007" @default.
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