Dual-Curvature Phased Array High-Intensity Focused Ultrasound Transducer for Tumor Therapy
AssigneeNational Health Research Institutes
InventorsGin-Shin Chen, Hsu Chang, Win-Li Lin
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Abstract
A transducer for use with a high intensity focused ultrasound medical system, said transducer comprises a plurality of transducer elements that are made from multi piezocomposite material; said plurality of transducer elements bonded together in turn with an adhesive and said transducer elements deployed along a geometric structure with two curvatures, and a plurality of electrodes arranged on said transducer for exciting said transducer elements in different phases to emit ultrasonic waves in response to an electrical signal applied to said electrodes to form or to be steered to a common focus center in a desired ablation area.
Claims8
A transducer for use with a high intensity focused ultrasound medical system, said transducer comprising:
- a plurality of transducer elements that are made from multi piezocomposite material;
- said plurality of transducer elements bonded together in turn with an adhesive and said transducer elements deployed along a geometric structure with two curvatures, and;
- a plurality of electrodes arranged on said transducer for exciting said transducer elements in different phases to emit ultrasonic waves in response to an electrical signal applied to said electrodes to form or to be steered to a common focus zone in a desired ablation area.
The method to design a dual-curvature transducer for use with a high intensity focused ultrasound medical system, said method comprising the steps of:
- determining a number of transducer elements for a surface of said dual-curvature transducer by considering a focus steering ability;
- applying an independent driving method or a symmetric driving method to said transducer elements;
- determining a wide aperture of said surface of said dual-curvature by considering a necessity of total acoustic power of said dual-curvature transducer, and;
- determining a ratio of radii of dual curvatures to form a geometric shape of said dual-curvature transducer by considering an intensity of acoustic energy absorption and a focus-steering range in said desired ablation area.
Dependencies are inferred from the claim text.