Integration of Three-Dimensional Positioning System and Ultrasound System and MR Imaging System for Thermal Therapy
Date Issued
2014
Date
2014
Author(s)
Huang, Jyun-Yan
Abstract
The potential of Magnetic Resonance Imaging guided High Intensity Focused Ultrasound (MRIgHIFU) thermal therapy was well-known through domestic and foreign research institutions and companies. Non-invasive treatment and short treatment period for each lesion are the technical advantages of MRIgHIFU for clinical treatment. The purpose of this study is to integrate a three-dimensional positioning system, focused ultrasound system and MRI imaging system for MRIgHIFU thermal therapy.
In this study, LabVIEW development environment was used for system integration. The main structure is a three-dimensional positioning system to load ultrasound transducer to perform thermal therapy. This system was combined with a 1.5-T MRI to guide transducer movement, to plan and to monitor the treatment. A suitable transducer can be chosen for the tumor location and size. User can control the movement of the positioning system, ultrasound output power, ultrasound sonication time and observe the MRI temperature mapping via the host computer.
The results show that the time error of ultrasound system output control is less than 0.1 s, and the position error of ablation region is around 3 mm. The MRI temperature mapping for the developed program has similar results as that of National Health Research Institute while conversion of the raw data with more interference may produce a higher error.
In this study, the integration of three-dimensional positioning system, ultrasound heating system and MRI imaging system was completed. This system can operate properly under the laboratory conditions and the MR environment. However, the cause of MR image noise must be overcome to obtain a better accuracy of MR temperature mapping.
Subjects
聚焦超音波
磁振造影
三維移動平台
系統整合
磁振造影導引高能量聚焦超音波熱治療
Type
thesis
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