Tactile and hyperspectral imaging sensors for mammary tumor characterization

Sahu, Amrita; Saleheen, Firdous; Oleksyuk, Vira; Chen, Yi; Won, Chang-Hee

doi:10.1109/icsens.2013.6688136

Cited by 3 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sahu et al [9] applied a visual inspection using an optical camera and a hyperspectral imaging sensor to observe the transverse displacement of the lesion. However, when the camera is used, the privacy of the patient can become a concern.…”

Section: Displacement Measurementmentioning

confidence: 99%

Displacement Measurement of Soft Material Indentation using Light Intensity

Hassan¹,

Omar²

2022

JMechE

View full text Add to dashboard Cite

This paper studies proof of concept in which soft material displacement during indentation is measured by a change in light intensity as the indenter is pushed into a soft material. The Light Dependent Resistor (LDR) sensor, which is embedded within a transparent hemispheric indenter, is used to measure the intensity of light while the indenter is on the surface and within the soft material. The change in light intensity contributes to a gradient that can be used to calculate the displacement of the soft material. The calculated difference in light intensity is converted into a displacement with the mean conversion factor obtained from the calibration equation. Measurements were carried out on three silicone samples with varying elastic properties over a range of different light intensities. By referring to linear regression and Rsquared values, the proposed concept has high consistency in measuring the difference of light intensity for various materials at different initial light intensities with more than 95% of R-squared values. In addition, the mean of variance between measurements, reflecting repeatability, is within an outstanding 1.5%. In the meantime, the accuracy of the proposed concept tested concerning the actual displacement is less than 10% of the variation. With promising results, the proposed design can be applied as a standalone technology or as an extension to a hand-held soft material characterization device for further improvement.

show abstract

Section: Displacement Measurementmentioning

confidence: 99%