Abstract: A design and a manufacturing method of ultrasound transducers based on films of ferro-electric ceramic material is presented, the transducers being particularly useful for operating at frequencies above 10 MHz. The designs also involve acoustic load matching layers that provides particularly wide bandwidth of the transducers, and also multiple electric port transducers using multiple piezoelectric layers, for multi-band operation of the transducers over an even wider band of frequencies that covers ˜4 harmonics of a fundamental band. A transceiver drive system for the multi-port transducers that provides simple selection of the frequency bands of transmitted pulses as well as transmission of multi-band pulses, and reception of scattered signals in multiple frequency bands, is presented.
Type:
Grant
Filed:
June 24, 2002
Date of Patent:
July 13, 2004
Assignee:
Eagle Ultrasound AS
Inventors:
Bjorn A. J. Angelsen, Tonni F. Johansen, Jarle Østgård
Abstract: A design and a manufacturing method of ultrasound transducers based on films of ferro-electric ceramic material is presented, the transducers being particularly useful for operating at frequencies above 10 MHz. The designs also involve acoustic load matching layers that provides particularly wide bandwidth of the transducers, and also multiple electric port transducers using multiple piezoelectric layers, for multi-band operation of the transducers over an even wider band of frequencies that covers ˜4 harmonics of a fundamental band. A transceiver drive system for the multi-port transducers that provides simple selection of the frequency bands of transmitted pulses as well as transmission of multi-band pulses, and reception of scattered signals in multiple frequency bands, is presented.
Type:
Application
Filed:
June 24, 2002
Publication date:
January 30, 2003
Applicant:
Eagle Ultrasound AS
Inventors:
Bjorn A.J. Angelsen, Tonni F. Johansen, Jarle Ostgard
Abstract: An ultrasound probe capable of scanning an ultrasound beam in a region of 3D space, characterized by that an ultrasound transducer array is mounted to a 1st shaft that can rotate in bearings mounted in a fork that can be moved. The fork can be rotated around a 2nd shaft in a bearing, or moved through a sliding system, or a combination of the two. The shaft and the fork are connected to two separate electric motors for electric steering of the array direction within a region of 3D space. Position measurement systems are mounted to the shaft and the fork so that the beam direction can be steered with a feed-back control system.
Type:
Application
Filed:
June 24, 2002
Publication date:
January 23, 2003
Applicant:
Eagle Ultrasound AS
Inventors:
Bjorn A.J. Angelsen, Tonni F. Johansen, Stig B. Kjode