Augmented ultrasonography with implanted CMOS electronic motes

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Integrated Circuit Design

Background:

• Clinical practice increasingly relies on advanced imaging technologies.
• Efforts are underway to enhance ultrasound imaging with contrast agents or reporters.
• Current methods may lack the ability to provide localized, specific physiological data within an image.

Purpose of the Study:

• To design and prototype a battery-less integrated circuit mote for medical ultrasound imaging.
• To enable the mote to act as an electronic reporter, transmitting information acoustically.
• To demonstrate the potential for augmented ultrasonography with localized physiological data.

Main Methods:

• Design and fabrication of a battery-less integrated circuit mote.
• Characterization of mote operation in vitro and in vivo.
• Evaluation of acoustic backscatter, power consumption, and signal-to-noise ratio.

Main Results:

• The developed motes exhibit ultra-low static power consumption (<57 pW).
• Motes operate effectively at low acoustic energy duty cycles (as low as 50 ppm).
• Demonstrated high signal-to-noise ratios (>19.1 dB) at depths up to 40 mm in lossy phantoms.

Conclusions:

• The battery-less electronic reporter successfully transmits information captured within ultrasound images.
• This technology offers a novel method for acquiring localized physiological data, augmenting standard ultrasound capabilities.
• The findings suggest potential for enhanced diagnostic accuracy and personalized medicine through augmented ultrasonography.