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13 March 2024 Whole-body ultrasound and thermoacoustic tomography for human imaging, needle localization, and ablation monitoring
David C. Garrett, Jinhua Xu, Geng Ku, Lihong V. Wang
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Proceedings Volume PC12842, Photons Plus Ultrasound: Imaging and Sensing 2024; PC128420C (2024) https://doi.org/10.1117/12.3009186
Event: SPIE BiOS, 2024, San Francisco, California, United States
Abstract
We developed a system for whole-body ultrasound tomography of the entire human cross-section, localizing biopsy needles, and monitoring microwave ablation progress. Our ultrasound approach enables 2D isotropic images of reflectivity, speed of sound, and attenuation profiles, where several organs and features are clearly observed in humans. For needle localization, we couple ultrasound into a commercial biopsy needle, resulting in scattered signals at the tip which are detected and used to recover ~7 images per second over a human-scale cross-section. In ablation monitoring, we apply a modulated microwave signal to a commercial ablation probe to obtain thermoacoustic images of thermal deposition. We validate this technique using bovine liver during ablation. This suite of techniques may provide a convenient tool for diagnosing and treating a variety of abdominal conditions.
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David C. Garrett, Jinhua Xu, Geng Ku, and Lihong V. Wang "Whole-body ultrasound and thermoacoustic tomography for human imaging, needle localization, and ablation monitoring", Proc. SPIE PC12842, Photons Plus Ultrasound: Imaging and Sensing 2024, PC128420C (13 March 2024); https://doi.org/10.1117/12.3009186
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KEYWORDS
Ablation
Signal detection
Microwave radiation
Acoustic tomography
Ultrasonography
Ultrasonics
Biopsy
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