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Full-field acoustomammography using an acousto-optic sensor.

J S Sandhu, R A Schmidt, P J La Rivière

Medical Physics

|July 21, 2009

Summary

A new breast imaging technique called acoustography uses acousto-optic (AO) sensors to create ultrasound projection images. This method, integrated with mammography, shows promise for improving breast cancer screening accuracy.

Area of Science:

Medical Imaging
Biomedical Engineering
Acoustics

Background:

Mammography is a standard breast cancer screening tool.
Limitations in sensitivity and specificity of mammography exist.
Novel imaging modalities are needed to enhance breast cancer detection.

Purpose of the Study:

To introduce and evaluate acoustography, a wide-field transmission ultrasound imaging technique for breast imaging.
To assess the feasibility of integrating acoustography with traditional mammography systems.
To determine the potential of acoustography to improve breast cancer screening outcomes.

Main Methods:

Development of a wide-field transmission ultrasound system utilizing a large area acousto-optic (AO) sensor.
Integration of the AO sensor with a digital video camera for image acquisition and processing.

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Geometric resolution analysis and imaging of a multimodality breast phantom using both mammography and acoustography.

Main Results:

The acoustography technique demonstrated feasibility through phantom imaging.
Geometric resolution analysis suggests detection of 3 mm tumors with 8.5 MHz ultrasound.
Acoustography phantom images exhibited high contrast, comparable to digital mammograms.

Conclusions:

Acoustography, a full-field transmission ultrasound detector, is feasible for breast imaging.
This technique, when combined with mammography, could potentially enhance screening sensitivity and specificity.
Further research is needed to address challenges such as acoustic coupling and anatomical background clutter.