Magnetically Actuated Forward-Looking Interventional Ultrasound Imaging: Feasibility Studies

2020 ◽  
Vol 67 (6) ◽  
pp. 1797-1805 ◽  
Author(s):  
Jinhyoung Park ◽  
Changyang Lee ◽  
Junsu Lee ◽  
Jung-Ik Ha ◽  
Hongsoo Choi ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Feasibility Studies ◽  
Interventional Ultrasound ◽  
Magnetically Actuated ◽  
Forward Looking

Magnetically Actuated Microplatform Scanners for Intravascular Ultrasound Imaging

2000 ◽  
Author(s):  
Carl W. Chang ◽  
Paul Lum ◽  
Richard S. Muller
Keyword(s):  
Magnetic Material ◽  
Silicon Nitride ◽  
Intravascular Ultrasound ◽  
Ultrasound Imaging ◽  
Present State ◽  
Lower Cost ◽  
State Of The Art ◽  
Deionized Water ◽  
Intravascular Ultrasound Imaging ◽  
Magnetically Actuated

Abstract We have fabricated a magnetically actuated microplatform scanner for use in a catheter-based intravascular ultrasound imaging (IVU) system. The torsional microplatform is fabricated from low stress silicon nitride with electroplated-Ni stripes for the magnetic material. Experiments with the microplatform have shown it capable of positioning an attached ultrasonic source (350 by 350 by 400 μm3 with a mass of 150 μg) through a total scan angle of 90°. The devices were evaluated in both air and immersed in deionized water. An IVU system based on this microplatform promises lower cost and greater flexibility than are provided by present state-of-the-art mechanically driven IVU systems.

A Magnetically Actuated Scanner for Intravascular Ultrasound Imaging

2001 ◽  
Author(s):  
Carl W. Chang ◽  
Thomas Budde ◽  
Hans H. Gatzen ◽  
Richard S. Muller
Keyword(s):  
Intravascular Ultrasound ◽  
Ultrasound Imaging ◽  
Operational Flexibility ◽  
Intravascular Ultrasound Imaging ◽  
Magnetic Circuits ◽  
Magnetically Actuated ◽  
Magnetic Source ◽  
Single Turn ◽  
Dc Current ◽  
Magnetic Drive

Abstract We have fabricated and tested a magnetically actuated microplatform system for intravascular ultrasound imaging (IVUS). The system consists of a torsional microplatform located above a magnetic drive source. The magnetic source is fabricated on a separate wafer and is made up of a pair of U-shaped permalloy yokes with surrounding coils. Two Ni bars on the ends of the microplatform complete two magnetic circuits that are individually activated to tilt the corresponding side of the microplatform. Experiments show that the microplatform can rotate through a mechanical-scan angle of 14.8°. The initial magnetic source design requires a dc current of 1.48A to achieve this rotation, which can be substantially reduced by replacing the single-turn coils with dual-layer multiturn coils. The magnetically actuated microplatform system could be built at lower cost and provide greater operational flexibility than are available with present-day state-of-the-art IVUS systems.

scholarly journals Forward-looking intracardiac ultrasound imaging using a 1-D CMUT array integrated with custom front-end electronics

2008 ◽  
Vol 55 (12) ◽  
pp. 2651-2660 ◽  
Author(s):  
A. Nikoozadeh ◽  
I.O. Wygant ◽  
Der-Song Lin ◽  
O. Oralkan ◽  
A.S. Ergun ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Front End ◽  
Intracardiac Ultrasound ◽  
Forward Looking
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