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- W3121231409 abstract "Abstract A physician palpates a tissue to detect an embedded tumor nodule by sensing an increase in local tissue stiffness and nodule size. The Hertz contact model, however, is unable to predict the material or physical properties of a tumor nodule embedded in a healthy tissue of finite thickness. In this study, utilizing a hyperelastic material model, we propose a general methodology to analyze the extent to which the stiffness, size, and depth of a nodule embedded in a tissue affect its detectability. Using dimensional analysis, we generate simple power-law relations to predict physical and material properties of tumor nodules embedded in healthy tissue during indentation. Our results indicate that indenter radius and indentation depth are critical parameters in nodule detection and a thin indenter and large indentation depth increase detection sensitivity of an embedded tumor nodule. Our results also show that anisotropic material properties of either a tissue or an embedded nodule render the embedded tumor nodule undetectable using indentation. We define palpation sensitivity maps that can be used to predict material and physical properties of tumor nodules in healthy tissues. The analysis and results presented in this study might increase accuracy and precision in instrumented probe-based laparoscopic or robotic surgeries." @default.
- W3121231409 created "2021-02-01" @default.
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- W3121231409 date "2021-02-22" @default.
- W3121231409 modified "2023-10-15" @default.
- W3121231409 title "Palpation Sensitivity of an Embedded Nodule Using the Finite Element Method" @default.
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- W3121231409 doi "https://doi.org/10.1115/1.4049906" @default.
- W3121231409 hasPublicationYear "2021" @default.
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