Magnetic resonance guided ultrasound therapy system with incline

Details Magnetic resonance guided ultrasound therapy system with incline Magnetic resonance guided ultrasound therapy system with incline

1992-11-06

1994-01-04

Smith, Ruth S.

Surgery

Truss

Pad

128 24AA, 607 96, A61B 5055

Patent

active

052751651

ABSTRACT:
A magnetic resonance (MR) surgery system facilitates surgery with a focussed ultrasound transducer that selectively destroys tissue in a region within a subject. The focussed energy transducer dissipates energy at a focal point within the region of tissue to be destroyed. A non-magnetic positioning device having a vertical dimension small enough to fit easily within the bore of an MR magnet moves an energy transducer in a limited vertical space. The positioning device employs a plurality of hydraulic positioners and an inclined plane to position the ultrasound focal point under the control of an operator. An MR imaging system employing a temperature sensitive pulse sequence creates an image of the tissue and the region being heated to allow the operator to adjust the position of the ultrasonic transducer so as to direct ultrasonic energy to the appropriate location.

REFERENCES:
patent: 4914608 (1990-04-01), LeBihan et al.
patent: 4951688 (1990-08-01), Keren
patent: 5078143 (1992-01-01), Okazaki et al.
patent: 5113848 (1992-05-01), Krauss et al.
patent: 5131392 (1992-07-01), Jolesz et al.
patent: 5207214 (1993-05-01), Romano
"Effects of Physical Parameters on High Temperature Ultrasound Hyperthermia Ultrasound" in Med. & Biol., vol. 16, No. 4, pp. 409-420, 1990.

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