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MODELING METHODOLOGY OF PULSE-ECHO ULTRASOUND SYSTEM FOR MEDICAL IMAGING DIAGNOSTICS
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- Authors
- Advisor
- 김수환
- Major
- 공과대학 전기·컴퓨터공학부
- Issue Date
- 2017-02
- Publisher
- 서울대학교 대학원
- Keywords
- ultrasound imaging ; ultrasound transducer ; behavior modeling ; design optimization ; impedance matching ; MATLAB
- Description
- 학위논문 (박사)-- 서울대학교 대학원 : 전기·컴퓨터공학부, 2017. 2. 김수환.
- Abstract
- A flexible clinical ultrasound system must operate with different transducers, which have characteristic impulse responses and widely varying impedances. The impulse response determines the shape of the high-voltage pulse that is transmitted and the specifications of the front-end electronics that receive the echo
and the impedance determines the specification of the matching network through which the transducer is connected. System-level optimization of these subsystems requires accurate modeling of pulse-echo (two-way) response, which in turn demands a unified simulation of the ultrasonics and electronics.
This thesis proposed modeling methodology of pulse-echo ultrasound system for medical imaging diagnostics and the development of pulse-echo ultrasound system simulator in the Matlab/Simulink environment by using the modeling methodology. This simulator is realized by combining Matlab/Simulink models of the high-voltage transmitter, the transmission interface, the acoustic subsystem which includes wave propagation and reflection, the receiving interface, and the front-end receiver.
To demonstrate the effectiveness of our simulator, the models are experimentally validated by comparing the simulation results with the measured data from commercial ultrasound system. Proposed pulse-echo ultrasound simulator, which is developed by our modeling methodology, could be used to quickly provide system-level feedback for an optimized tuning of electronic design parameters.
- Language
- English
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