[특허]Lithotripsy system with automatic 3D tracking

Lithotripsy system with automatic 3D tracking 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61H-001/00 A61B-017/225 A61B-017/22
출원번호	US-0289717 (2008-11-03)
등록번호	US-8979776 (2015-03-17)
발명자 / 주소	Gelbart, Daniel Machan, Lindsay
출원인 / 주소	Gelbart, Daniel
대리인 / 주소	Oyen Wiggs Green & Mutala LLP
인용정보	피인용 횟수 : 0 인용 특허 : 56

초록 ▼

A lithotripsy system capable of 3D tracking monitors the acoustic reflection from the stone in order to focus the shock wave on the stone regardless of shock wave displacement or stone movement. The tracking and focusing is based on a phased array concept, allowing the lithotripsy head to remain sta

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1. A lithotripsy system for the tracking and the destruction of a moving object inside the body of a patient, the system comprising: a lithotripsy head comprising at least one transducer operable to generate shockwaves focused on said moving object, a shockwave steering device and a body-contacting portion wherein the body-contacting portion is configured to contact the body of the patient and to transmit the shockwaves into the body of the patient;a tracking system configured to track the moving object in at least two dimensions, the tracking system comprising a plurality of acoustic detectors configured to sense acoustic reflections from said moving object, andsaid shockwave steering device configured to variably tilt wavefronts of the shockwaves in response to tracking information from the tracking system to keep said shockwaves focused on said moving object, said shockwave steering device operable to tilt the wavefronts while the body-contacting portion of the lithotripsy head and the at least one transducer remain fixed relative to the body of said patient, and wherein the shockwave steering device comprises a liquid wedge;an acoustic lens located to focus the wavefronts of the shockwaves that have been tilted by the shockwave steering device whereby the tilting of the wavefronts by the shockwave steering device causes a corresponding displacement in a location at which the wavefronts of the shockwaves are focused by the acoustic lens; and,wherein the liquid wedge comprises a plate having a first fluid on one side of the plate and a second fluid on a second side of the plate wherein the speed of sound is different in the first and second fluids and the shockwave steering device comprises a first actuator for tilting the plate. 2. A lithotripsy system according to claim 1 further comprising a source of a pulsed acoustic wave wherein said acoustic reflections comprise reflections of the pulsed acoustic wave. 3. A lithotripsy system according to claim 1 further comprising a source of a continuous acoustic wave wherein said acoustic reflections comprise reflections of the continuous acoustic wave. 4. A lithotripsy system according to claim 1 wherein the at least one transducer is operable for generating low power acoustic waves for generating said acoustic reflections from the object. 5. A lithotripsy system according to claim 4 wherein said low power acoustic waves comprise pulsed acoustic waves. 6. A lithotripsy system according to claim 4 wherein said low power acoustic waves comprise continuous acoustic waves. 7. A lithotripsy system according to claim 4 wherein said system for generating a shockwave is also operable to generate low power acoustic waves for generating the said acoustic reflections from the object. 8. A lithotripsy system according to claim 1 wherein said liquid wedge is electromagnetically actuated. 9. A lithotripsy system according to claim 1 wherein said liquid wedge comprises a layer of glycerine. 10. A lithotripsy system according to claim 1 wherein said acoustic lens is coated with an anti-reflection acoustic coating. 11. A lithotripsy system according to claim 1 wherein the shockwave steering device further comprises a second actuator for altering a curvature of the plate. 12. A lithotripsy system according to claim 11 wherein the first fluid comprises glycerine. 13. A lithotripsy system according to claim 12 wherein the second fluid comprises water. 14. A lithotripsy system according to claim 1 wherein the second fluid is in a chamber filling a space between the plate and an acoustic lens. 15. A lithotripsy system according to claim 1 wherein the first actuator for tilting the plate comprises a plurality of electromagnetic actuators connected between the plate and the lithotripsy head. 16. A lithotripsy system for the tracking and the destruction of a moving object inside the body of a patient, the system comprising: a lithotripsy head comprising at least one transducer operable to generate shockwaves focused on said moving object, a shockwave steering device and a body-contacting portion wherein the body-contacting portion is configured to contact the body of the patient and to transmit the shockwaves into the body of the patient;a tracking system configured to track the moving object in at least two dimensions, the tracking system comprising a plurality of acoustic detectors configured to sense acoustic reflections from said moving object;said shockwave steering device configured to variably tilt wavefronts of the shockwaves in response to tracking information from the tracking system to keep said shockwaves focused on said moving object, said shockwave steering device operable to tilt the wavefronts while the body-contacting portion of the lithotripsy head and the at least one transducer remain fixed relative to the body of said patient;wherein the at least one transducer comprises a phased array of transducers and the shockwave steering device comprises a controller configured to energize the transducers of the phased array in a time sequence to tilt the wavefronts of the shockwaves; and,wherein the phased array of transducers comprises a diaphragm divided into an array of independently-deflectable zones and at least one electromagnetic actuator coupled to the diaphragm to drive motion of the diaphragm in each of the zones. 17. A lithotripsy system according to claim 16 wherein the at least one electromagnetic actuator each comprises a capacitor, and a switch controlling discharge of the capacitor into a coil. 18. A lithotripsy system according to claim 16 wherein the tracking system comprises piezoelectric sensors incorporated into the phased array of transducers.

이 특허에 인용된 특허 (56)

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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Lithotripsy system with automatic 3D tracking 원문보기

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Lithotripsy system with automatic 3D tracking 원문보기

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