應用於醫療用手持式低功耗4D即時超音波系統之研究---子計畫四：應用於4D即時超音波系統具影像強化及訊號壓縮架構設計

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Title:	應用於醫療用手持式低功耗4D即時超音波系統之研究---子計畫四：應用於4D即時超音波系統具影像強化及訊號壓縮架構設計 Architectural Design for Handheld 4D Ultrasound System Image Enhancement and Signal Compression
Authors:	夏至賢
Contributors:	電機工程學系
Date:	2015-08
Issue Date:	2015-09-04 14:37:44 (UTC+8)
Abstract:	近年來，醫用超音波影像的需求越來越大，不同於傳統的2D超音波，3D超音波可以呈現出立體影像，而4D超音波則有即時動態立體成像的效果。子計畫四希望能開發出可供手持式4D超音波系統使其在嵌入式軟硬體設計上可以符合4D醫用超音波的微小化的發展趨勢。在其系統中，目前B模式超音波的影像對比度較差且尚未有好的改善，以至於部分病灶不意確實判斷、以及D模式在手持式下因處理速度無法即時處理與影體成本過高以至於無法達到新一代4D超音波的規格問題產生。有鑒於此，研究計畫規劃一個兩年期之研究計畫，第一年的研究將提出自適性對比調整為基礎的超音波影像強化技術。第二年之研究主題將改善低空間複雜度、低時間複雜度的運動補償算法、以及減少其影格間記憶單元的使用並加快其運算速度、以減少其硬體使用之成本，利用 SoC方式加以實現，並以低功率及低成本為目標，希望能對手持式4D超音波作進一步的改善與實現。 The demands for medical ultrasound imagery have increased over recent years. In contrast to traditional 2D ultrasound, 3D ultrasound provides stereoscopic images and 4D ultrasound produces real-time dynamic stereoscopic images. Sub-project 4 hoped to develop a handheld 4D ultrasound system with an embedded hardware and software design that conforms to the miniaturization trend in 4D medical ultrasounds. Within the system, the current B-mode ultrasound image contrast is poor and has yet to see any improvements, such that it is difficult to determine some lesions. D-mode handheld processing speeds cannot handle real-time processing and the imaging costs are extremely high. Thus, this cannot provide new 4D ultrasound specifications. As such, a two-year study plan was proposed. During the first year, an ultrasound image enhancing technology based on adaptive contrast modulation was introduced. During the second year, the low spatial complexity, low time complexity algorithm for motion compensation was improved, the use of the frame memory units was reduced, and the operation speed was quickened in order to reduce the cost of hard drive use. The SoC methods were used to achieve low power and low cost with the hope of further improving handheld 4D ultrasound technology.
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