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Ultra-sensitive optical coherence elastography using a high-dynamic-range force loading scheme for cervical rigidity

Xinwen Yao^1,2,3, Dawei Li^1,3, Hyeon-Cheol Park¹

¹Department of Biomedical Engineering, 720 Rutland Ave, Baltimore, MD 21205, USA.

Biomedical Optics Express

|March 6, 2020

Summary

This summary is machine-generated.

A new optical coherence elastography (OCE) method precisely measures cervical tissue elasticity. This technique reveals a significant drop in rodent cervical rigidity during late pregnancy.

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A Probing Device for Quantitatively Measuring the Mechanical Properties of Soft Tissues during Arthroscopy

A Probing Device for Quantitatively Measuring the Mechanical Properties of Soft Tissues during Arthroscopy

Published on: May 1, 2020

Area of Science:

Biomedical Engineering
Biophysics
Medical Imaging

Background:

Cervical tissue elasticity is crucial for understanding pregnancy progression and complications.
Accurate measurement of tissue mechanical properties, like Young's modulus, is vital for diagnostics.
Existing elastography methods may lack the sensitivity or range for subtle tissue changes.

Purpose of the Study:

To develop and validate an ultra-sensitive, wide-range force loading scheme for compression optical coherence elastography (OCE).
To quantitatively analyze cervical tissue elasticity ex vivo.
To investigate changes in cervical tissue rigidity during rodent pregnancy.

Main Methods:

Designed a novel force loading apparatus using a water sink for incremental droplet loading.
Employed compression optical coherence elastography (OCE) for non-invasive imaging.
Calculated Young's modulus by fitting stress-strain curves derived from OCE data.
Validated the system using homogenous agar phantoms before testing on rodent cervical tissues.

Main Results:

The proposed OCE system accurately estimated Young's modulus in agar phantoms.
Demonstrated significant reduction in rodent cervical tissue rigidity (Young's modulus).
Observed this rigidity drop specifically in the third trimester of rodent pregnancy.

Conclusions:

The developed ultra-sensitive, wide-range force loading scheme enables precise quantitative analysis of cervical tissue elasticity.
This method can effectively detect biomechanical changes in cervical tissues during pregnancy.
Findings suggest a link between decreased cervical rigidity and the third trimester of rodent pregnancy, relevant for studying preterm birth risk.