Wide-field quantitative micro-elastography of freshly excised human prostate

Area of Science:

• Biomedical Engineering
• Optical Imaging
• Cancer Diagnostics

Background:

• Prostate cancer diagnosis relies on imaging, but differentiating tumors from healthy tissue remains challenging.
• Optical coherence tomography (OCT) provides high-resolution microarchitecture visualization but lacks reliable tumor contrast.
• Advanced imaging techniques are needed to improve diagnostic accuracy for prostate cancer.

Purpose of the Study:

• To develop and validate a wide-field quantitative micro-elastography (QME) method for enhanced prostate cancer detection.
• To assess the capability of QME to provide contrast based on mechanical properties, complementing OCT.
• To improve the differentiation of cancerous tissue from healthy prostate tissue using mechanical imaging.

Main Methods:

• Wide-field quantitative micro-elastography (QME) was employed to image mechanical properties of excised human prostate tissue.
• Volumetric OCT, strain, and elasticity images were generated over a 46 × 46 × 1 mm³ field-of-view.
• Image co-registration with standard histology was performed for validation.

Main Results:

• QME successfully imaged micro-scale mechanical properties of prostate tissue, revealing variations in stiffness.
• The generated elasticity contrast correlated with tumor presence, indicating increased stiffness in cancerous regions.
• Co-registration with histology confirmed the accuracy of QME in mapping mechanical variations.

Conclusions:

• Wide-field QME offers valuable contrast for prostate cancer detection by quantifying tissue stiffness.
• Combining QME with OCT enhances visualization and differentiation of tumors from healthy prostate tissue.
• This approach shows promise for improving image-guided biopsies and diagnostic procedures in prostate cancer management.