Development of a Three-dimensional Motion Platform System Bearing Ultrasound Transducers for MRI-guided Tumor Thermal Surgery
Date Issued
2011
Date
2011
Author(s)
Jhou, Rong-Cian
Abstract
Focused ultrasound surgery (FUS) is a method of tissue ablation that can be guided and monitored with magnetic resonance imaging (MRI). Magnetic resonance-guided focused ultrasound surgery (MRgFUs) has been shown clinically effective in the treatment of uterine fibroids and it is being evaluated as a method of thermal ablation for other benign and malignant tumor. In this study, a three-dimensional motion platform system bearing an ultrasound transducer for MRI-guided tumor thermal surgery was developed. We use an acrylic material to make the motion platform. A non-magnetic piezoelectric ceramic motor was used to move the platform and the linear encoder to track the platform motion. Because ultrasound waves need a medium for propagation, the transducer and the platform were placed in a water tank. Glass slides were put uniformly on the top of the platform in order to counterbalance the buoyancy. Therefore, the motor loading can be reduced and the accuracy of the platform can be effectively improved. The performance of the system was evaluated. It can bear the ultrasound transducer and perform the three-dimensional motion control during the MRI-guided thermal surgery. The localization error is smaller than 100..
Subjects
Magnetic resonance-guided focused ultrasound surgery (MRgFUs)
Three-dimensional motion control system
Nonmagnetic piezoelectric ceramic motor
Nonmagnetic linear encoder
Type
thesis
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