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Todd Fjield, Edward Paul Harhen, David E Acker, Patrick David Lopath: Thermal treatment methods and apparatus with focused energy application. Transurgical, Lerner David Littenberg Krumholz & Mentlik, October 21, 2003: US06635054 (340 worldwide citation)

A collapsible ultrasonic reflector incorporates a gas-filled reflector balloon, a liquid-filled structural balloon an ultrasonic transducer disposed within the structural balloon. Acoustic energy emitted by the transducer is reflected by a highly reflective interface between the balloons. In a cardi ...


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Bharat B Pant, David E Acker, Edward Paul Harhen: Intrabody hifu applicator. Transurgical, Lerner David Littenberg Krumholz & Mentlik, October 8, 2002: US06461314 (280 worldwide citation)

An apparatus and method for applying sonic energy within the body of the living subject. A probe for applying sonic energy within the body of a subject includes a probe body having a proximal and a distal end adapted for insertion into the body of a subject, a spatially-distributed sonic transducer ...


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David E Acker, Patrick David Lopath: Hifu applications with feedback control. Transurgical, Lerner David Littenberg Krumholz & Mentlik, January 21, 2003: US06508774 (245 worldwide citation)

High intensity focused ultrasound heating is provided by applying therapeutic ultrasonic waves using an array of transducers. Cavitation is detected by using some or all of the transducers in the array to detect ultrasonic waves emanating from or reflected from the patient's body or the interfa ...


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David E Acker, Louis R Kavoussi, Bharat B Pant, Patrick David Lopath, Emad S Ebbini: Occlusion of tubular anatomical structures by energy application. Transurgical, Lerner David Littenberg Krumholz & Mentlik, July 29, 2003: US06599256 (244 worldwide citation)

A tubular anatomical structure in a mammalian subject is occluded by directing ultrasonic energy from outside of the body. For example, a male subject may be sterilized by directing ultrasonic energy through the skin of the scrotum, onto the vas deferens. The focal spot of an ultrasonic transducer m ...


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David E Acker, Alfred Novak: Sonic element and catheter incorporating same. Transurgical, Lerner David Littenberg Krumholz & Mentlik, December 30, 2003: US06669655 (231 worldwide citation)

A catheter carrying a radially-expansible ultrasonic transducer is threaded into the circulatory system and then the transducer is actuated to provide ultrasonic energy in a ring-like zone surrounding a blood vessel. Desirably, the transducer is arranged to focus the ultrasonic energy into a narrow, ...


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David E Acker, Mark Wagshul: MRI-guided therapeutic unit and methods. Transurgical, Lerner David Littenberg Krumholz & Mentlik, October 3, 2000: US06128522 (176 worldwide citation)

Magnetic resonance information acquired by a movable magnetic resonance instrument is used to monitor hyperthermia treatments such as tissue ablation. The instrument may include both the magnetic resonance equipment and an energy applicator such as a high intensity focused ultrasound unit. The treat ...


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David E Acker, Mark Wagshul: MRI-guided therapeutic unit and methods. Transurgical, Lerner David Littenberg Krumholz & Mentlik, February 4, 2003: US06516211 (131 worldwide citation)

Magnetic resonance information acquired by a movable magnetic resonance instrument is used to monitor hyperthermia treatments such as tissue ablation. The instrument may include both the magnetic resonance equipment and an energy applicator such as a high intensity focused ultrasound unit. The treat ...


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David E Acker: Pulmonary vein ablation with myocardial tissue locating. Transurgical, Lerner David Littenberg Krumholz & Mentlik, January 6, 2004: US06672312 (113 worldwide citation)

A method of treating cardiac arrhythmias by ablating a portion of the myocardial fibers within a pulmonary vein. Myocardial fibers within a pulmonary vein are located and ablated to block conduction of electrical signals to the heart from ectopic foci within the pulmonary vein. The myocardial fibers ...


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Todd Fjield, Patrick David Lopath, Edward Paul Harhen: Ultrasonic transducers. Transurgical, Lerner David Littenberg Krumholz & Mentlik, July 20, 2004: US06763722 (76 worldwide citation)

A compact, high-power ultrasonic emitting transducer has an active element such as a piezoelectric element and structure defining a reflective backing interface such as an air interface behind the rear surface of the active element. A liquid is provided in the resonant unit between the backing inter ...