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- W2059627721 abstract "The goal of this project is to develop an intra-cavity image-guided high intensity focused ultrasound (HIFU) device using piezocomposite technology and commercially available ultrasound imaging. The HIFU array, manufactured by Imasonic Corporation, is an 11-element annular phased array, with a focal length range of 30–60 mm, and operating frequency of 3 MHz (bandwidth of 1 MHz). The imaging probe (C9-5, Philips) is configured such that the focal axis of the HIFU beam was within the image plane. The array includes six complete central rings and five side-truncated peripheral rings, all with the natural radius of curvature of 50 mm. Impedance of all elements is approximately 50 ohms (10% accuracy for real and imaginary parts). Cross coupling between adjacent elements is less than, −40 dB. High power measurements showed more than 75% efficiency, at surface intensity of 2.66 W/cm2. Schlieren imaging showed effective focusing at all focal lengths (30–60 mm). The image-guided HIFU device requires water or hydrogel coupling, and possibly water cooling. The results of the full characterization for lesion formation in tissue-mimicking phantoms and biological tissues will be presented. Possible applications include uterine fibroids, abnormal uterine bleeding, and intraoperative hemostasis of occult hemorrhage." @default.
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- W2059627721 date "2004-05-01" @default.
- W2059627721 modified "2023-09-27" @default.
- W2059627721 title "A multi‐element high intensity focused ultrasound transducer: Design, fabrication, and testing" @default.
- W2059627721 doi "https://doi.org/10.1121/1.4782851" @default.
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