Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1996-12-09
1999-08-17
Smith, Ruth S.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600419, 324306, 601 2, 601 3, A61B 5055
Patent
active
059386002
ABSTRACT:
A method of heating a target region by ultrasound radiation includes determination of a position of the target region by a magnetic resonance method. The device for carrying out this method includes an ultrasound device and an MR device. By determining movement of the target region utilizing the MR device (100) and an appropriate magnetic resonance method, and by coupling the movement information to the ultrasound device (118) by an electric signal (122, 124), it is achieved that the ultrasound device can be controlled by the movement information. Various possibilities exist for controlling the ultrasound device. According to a first possibility, the focal region is adjusted to be situated within the target region in order to generate ultrasound. Another possibility is to determine from the movement information the instant at which the target region is situated within the focal region of the ultrasound and to generate ultrasound exclusively for a brief subsequent period during which the focal region is still within the target region. Another possibility is to refrain from generating ultrasound when the movement speed is too high. Finally, the movement information can also be used for making the focal region follow the target region during the generation of ultrasound.
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Ehman et al, "Adaptive Technique for High-Definition MR Imaging of Moving Structures", Radiology vol. 173 No. 1, 1989 pp. 255-263.
"On-Line MIR Monitored Noninvasive Ultrasound Surgery" K. Hynynen et al, Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, vol. 14, Paris, France, Oct. 29-Nov. 1, 1992.
Hofland Lennart
Van Vaals Johannes J.
Renfrew, Jr. Dwight H.
Smith Ruth S.
U.S. Philips Corporation
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