Systems and Methods for Noncontact Ultrasound Imaging

Historically, imaging interior tissues in the presence of dense materials such as bone has been challenging becaue of acoustic impedance, which causes poor image quality and diagnostic limitations. Traditional imaging methods like X-ray, MRI, or standard ultrasound face significant difficulties in such circumstances, thereby necessitating alternative approaches to visualize the obscured soft tissues for accurate diagnosis and treatment planning. The problems with current methods arise from their inability to adequately penetrate or navigate around high acoustic impedance materials without distortion or significant loss of signal quality. Both reverberation and signal clutter lead to reduced image clarity, making it difficult to distinguish tissues clearly. Existing solutions might also require contact with the body or invasive procedures, both of which carry additional risks and discomfort for patients.

Technology Description

This innovative imaging system leverages electromagnetic (EM) waves to non-invasively construct detailed images of interior tissues that are otherwise obscured by high acoustic impedance materials, such as bones. The system sends EM waves through these barriers, which are then absorbed and converted into either ultrasound (US) or audible band acoustic waves via thermoelastic mechanisms. This process enables the generation of acoustic waves that traverse the soft tissues without the usual issues of reverberation and signal clutter. Once the converted acoustic waves have propagated within the tissue, they are then measured using an external non-invasive detector, such as coherent lidar or an optical band multipixel camera. This facilitates the capture of clear images of soft tissue structures situated beyond high acoustic impedance barriers. To enhance the imaging process, a phased array can be implemented to direct and focus the acoustic radiation pattern, promoting a versatile and precise diagnostic tool for medical practitioners.