超音波逆散射簡化模型應用於醫用超音波模擬之研究

A Study on the Simulation of Medical Ultrasound Using a Simplified Model for Ultrasonic Backscattering

研究主要發展一簡化模型，用來模擬來自生物組織中的超音波逆散射訊號。由於一般個人電腦並無法擁有高速的運算效率，因此現有的超音波模型需要更進一步的被簡化，以更佳的應用於醫用超音波的基礎研究。我們使用了Bornapproximation的條件與折積理論來建立此簡化模型。用此模型可產生不同特性的超音波逆散射訊號以及灰階影像，並可更進一步的做為探討醫用超音波技術發展與學術研究的工具。此研究證明，簡化的超音波逆散射模型較其他模型可更簡單且更快速的被執行。

A simplified model to simulate ultrasonic backscattered signals from biological tissues wasdeveloped in this study. Due to the limited storage and efficiency for general personal computers, theexisting ultrasonic backscattering model needs to be further simplified for better applications on thefundamental researches associated with biomedical ultrasound. Born approximation and convolutionprinciple were applied to the simplified model. This model can be used to generate both ultrasonicbackscattered signals and gray-scale images for different characteristics and to be a tool for technologydevelopment and academic study in biomedical ultrasound. This study concluded that the simplifiedmodel of ultrasonic backscattering is simpler and faster to perform simulations than other models.