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Related Concept Videos

Ultrasonography01:17

Ultrasonography

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
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Updated: Feb 19, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications
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Real-Time On-Chip Time-of-Flight Detection for US Time Reversal Localization of Implants.

Anirudh Kumar Parag, Bogdan C Raducanu, Stefano Stanzione

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    Summary
    This summary is machine-generated.

    This study introduces a miniaturized ASIC for ultrasound time-reversal localization of medical devices. The novel design significantly reduces power and memory, enabling wearable applications.

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    Area of Science:

    • Biomedical Engineering
    • Signal Processing
    • Medical Devices

    Background:

    • Time-reversal (TR) ultrasound localization is effective for deep-tissue implantable medical devices (IMDs).
    • Current systems require significant miniaturization for low-power, wearable applications.

    Purpose of the Study:

    • To present a proof-of-concept Application-Specific Integrated Circuit (ASIC) architecture for miniaturized TR-based IMD localization.
    • To demonstrate reduced power and memory requirements for wearable IMD localization.

    Main Methods:

    • Developed a 45-channel ASIC with integrated receive/transmit chains.
    • Implemented a novel peak-instance-detection (PID) circuit for real-time time-of-flight (ToF) detection and digitization.
    • Conducted in-vitro experiments using a 3D-printed human rib phantom in scattering media.

    Main Results:

    • The PID circuit reduced per-channel receive power to 100 µW (2000X reduction) and memory usage to 540 bits (746X reduction) compared to commercial systems.
    • On-chip ToF digitization simplified TR computation.
    • Achieved a 22X power efficiency improvement over unfocused ultrasound transmission, matching commercial localization performance.

    Conclusions:

    • The proposed ASIC architecture is feasible for miniaturized, low-power, wearable TR-based IMD localization.
    • The novel PID circuit enables significant power and memory savings.
    • This technology advances the development of practical IMD localization systems.