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A Theoretical Approach in Applying High-Frequency Acoustic and Elasticity Microscopy to Assess Cells and Tissues
Frank Winterroth1, Jing Wang2, Onno Wink1
1Philips Research, Eindhoven, The Netherlands;
Annual Review of Biomedical Engineering
|February 19, 2025
Summary
Scanning acoustic microscopy (SAM) uses high frequencies for detailed imaging of biological tissues without sample preparation. This advanced ultrasound technique offers superior resolution and potential for diagnosing tissue differences.
Area of Science:
- Biophysics
- Medical Imaging
- Materials Science
Background:
- Medical ultrasound (2-10 MHz) visualizes internal organs.
- Scanning Acoustic Microscopy (SAM) employs higher frequencies (>50 MHz).
- Higher frequencies improve spatial resolution but limit imaging depth.
Purpose of the Study:
- To highlight the advantages of SAM over conventional microscopy.
- To explain the principles of SAM imaging.
- To discuss the potential applications of SAM in research and clinical settings.
Main Methods:
- Utilizes ultrasound frequencies exceeding 50 MHz.
- Images specimens by merging acoustic signals based on impedance mismatch.
- Assesses surface characteristics and elastic properties (elastography).
Main Results:
- Achieves high spatial resolution imaging of cells and tissues.
- Enables imaging without sample preparation, preserving native state.
- Distinguishes between healthy and affected tissues using elastography.
Conclusions:
- SAM provides accurate, high-resolution imaging of biological specimens.
- Its ability to image without preparation is a key advantage.
- SAM shows significant potential for diagnostic and analytical applications.
