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Spherical ultrasonic HIFU transducer with modular cavitation sense element

A technology of transducers and sensors, which is applied in the field of medical diagnostic ultrasound systems, and can solve problems such as the unavailability of transducers

Inactive Publication Date: 2014-01-29
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A damaged cavitation sensor, either due to reflected energy or damage during manufacturing, can render the entire transducer unusable, even if the HIFU element itself is still fully functional

Method used

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  • Spherical ultrasonic HIFU transducer with modular cavitation sense element
  • Spherical ultrasonic HIFU transducer with modular cavitation sense element
  • Spherical ultrasonic HIFU transducer with modular cavitation sense element

Examples

Experimental program
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Embodiment Construction

[0018] The construction of the HIFU transducer of the present invention can start from making a spherical or disc-shaped matching layer. The matching layer of the transducer provides at least partial matching of the acoustic properties of the piezoelectric transducer to the acoustic properties of the patient's body, or the medium between the transducer and the patient. The matched properties may include acoustic impedance, sound velocity, and material density. In conventional constructions of ultrasound transducers, a matching layer is typically formed on the transducer stack, above a reference electrode on the emitting surface of piezoelectric material. For the HIFU transducer described in this publication, the spherical matching layer itself is formed separately from the rest of the transducer. There are a number of ways to form the spherical matching layer, including casting, molding, thermoforming or machining. The spherical matching layer of the HIFU transducer describe...

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Abstract

An ultrasonic HIFU transducer has a threaded opening into which a modular cavitation sensor is removably located. The modular cavitation sensor includes a modular housing containing a piezoelectric transducer for sensing acoustic signals indicative of cavitation. The modular cavitation sensor has electrodes which engage spring contacts in the threaded opening when the modular housing is screwed into the threaded opening. A damaged sensor can be unscrewed and replaced simply without connectors or soldering.

Description

field of invention [0001] The present invention relates to a medical diagnostic ultrasound system and in particular to an ultrasound transducer for controlled heating of body tissue by high intensity focused ultrasound known as HIFU. Background technique [0002] Ultrasound delivered elevated temperature treatments are used for various therapeutic purposes. In HIFU treatment, ultrasound energy is focused on a small point in the body to heat the tissue to a temperature sufficient to produce the desired therapeutic effect. The technique is similar to lithotripsy, in which the focused energy is high enough to break up kidney stones, but delivered in significantly smaller amounts over extended periods of time rather than in sudden pulses. HIFU technology can be used to selectively destroy unwanted tissues in the body. For example, applying focused ultrasound energy to heat cells to a temperature sufficient to kill tissue, typically about 60 to about 80 degrees Celsius, can des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B3/04G10K15/04
CPCA61N7/02A61B2017/00106A61B2017/22008A61N2007/0065
Inventor D·D·克拉克
Owner KONINKLJIJKE PHILIPS NV