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Updated: Aug 2, 2026
08:08
Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System
Published on: March 6, 2019
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Backscatter properties of two-layer phantoms using a high-frequency ultrasound annular array
Wakana Saito1, Masaaki Omura2,3, Jeffrey A Ketterling4
1Graduate School of Science and Engineering, Chiba University, Yayoicho, Inage, Chiba 263-8522, Japan.
Japanese Journal of Applied Physics (2008)
|August 8, 2025
Summary
This study improves backscatter coefficient (BSC) estimation in complex tissues like skin. A new layered attenuation correction method using annular array ultrasound is most effective for accurate tissue characterization.
Area of Science:
- Ultrasound imaging
- Biomedical acoustics
- Tissue characterization
Background:
- Previous studies utilized annular-array transducers for homogeneous tissue characterization.
- A sound field correction method accounted for average medium attenuation.
Purpose of the Study:
- To generalize backscatter coefficient (BSC) evaluation using annular arrays for complex structures like skin.
- To improve BSC estimation in layered tissues with varying scattering properties.
Main Methods:
- Evaluation of BSC in layered phantoms with different scattering characteristics.
- Comparison of standard attenuation correction with novel methods.
- Application of layer-specific and position-specific attenuation correction techniques.
Main Results:
- Standard attenuation correction yielded significant deviations from predicted BSC in layered phantoms.
- A correction method applying the average attenuation of each layer proved most effective.
- The enhanced correction method is compatible with the extended depth of field from annular arrays.
Conclusions:
- The developed layered attenuation correction method enhances BSC accuracy in complex biological tissues.
- This technique is crucial for precise ultrasound-based tissue characterization.
- Annular array technology combined with advanced correction methods offers improved diagnostic capabilities.
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