Motion-Compensated Color Doppler DSP Engine and VLSI Design for Portable Ultrasound Imaging Systems
Date Issued
2012
Date
2012
Author(s)
LIU, ZIH-LING
Abstract
Ultrasonic imaging is a well-established imaging modality that has the advantages of cost-effectiveness, non-invasiveness, rapid imaging, and portability. With the progress of VLSI technique, portable ultrasound imaging systems have become a trend for tens of years. They are easily carried to where patients are, which largely decrease the inconvenience and pain for patients. Moreover, portable systems become more indispensable in supporting immediate diagnosis for emergency rescue to increases the survival rate.
Color Doppler imaging, one of the Doppler ultrasound modes, is valuable for visualizing the distribution and velocity by different colors in real time. However, traditional color Doppler imaging suffers from the motion between the probe and the patients. Slight motion causes severe image corruption. Although patients are asked to hold their breath and stay steady, motion cannot be avoided for child subject or in emergency situation such as ambulance, emergency room, and in battlefield. Furthermore, traditional Doppler engine needs complex parameter settings, which brings inconvenient and time-consuming adjustment. It also leads to large operation area reducing the portability of the ultrasound imaging system.
In this thesis, the research topic is to design and implement an intelligent color Doppler DSP engine for the portable ultrasonic imaging system. The major goals of the color Doppler DSP engine are high image quality, intelligent property, and portability. Hence, the presented engine is guided to have three features. First, it possesses an effective mechanism to eliminate motion artifact to reach good image quality. Second, it is designed with intelligent consideration, which eliminating noises adaptively with environment by easy parameter settings. Finally, it is implemented with customized ASIC design for low power and low cost considerations.
Subjects
Ultrasound
Color Doppler
Motion Compensated
Type
thesis
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