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Needle Aligned Ultrasound Image-Guided Access Through Dual-Segment Array.

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    A novel ultrasound (US) through-hole array enables accurate needle guidance for deep percutaneous nephrolithotomy (PCNL). This technology simplifies deep US-guided access, reducing risks associated with manual alignment in urology procedures.

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    Area of Science:

    • Medical Imaging
    • Surgical Technology
    • Urology

    Background:

    • Ultrasound (US)-guided percutaneous nephrolithotomy (PCNL) is increasingly used to minimize radiation exposure.
    • Current manual image-needle alignment techniques can lead to prolonged operation times and complications like bleeding due to misalignment.
    • A co-registration method between the US array and needle is needed to overcome these limitations.

    Purpose of the Study:

    • To develop and evaluate a novel dual-segment through-hole ultrasound array for deep target applications.
    • To inherently achieve image-needle alignment for improved percutaneous procedures.

    Main Methods:

    • A prototype dual-segment array with a 10 mm central opening was developed.
    • Phantom and ex-vivo studies were conducted at depths of 80-100 mm.
    • Image quality (SNR, FWHM, CNR) and needle access accuracy were evaluated using porcine kidneys.

    Main Results:

    • The dual-segment through-hole array demonstrated effective needle visibility and image quality.
    • Needle access accuracy was assessed, with a mean error of 2.94 ±1.09 mm over 20 trials.

    Conclusions:

    • The developed through-hole ultrasound array shows potential for simple and intuitive deep US image-guided access.
    • This technology could significantly improve the safety and efficiency of PCNL procedures.