北京生物醫(yī)學(xué)工程

一種彩色超聲多普勒血流速度估算的反正切優(yōu)化算法

An Optimization of Arc Tangent Calculation Applied to Velocity Estimation of Color Doppler Ultrasond

作者：李仙琴何新喜王延群王曉春王立偉周盛計(jì)建軍

單位：中國醫(yī)學(xué)科學(xué)院生物醫(yī)學(xué)工程研究所（天津 300192）

關(guān)鍵詞：彩色超聲多普勒；自相關(guān)；反正切; 現(xiàn)場可編程門陣列; 查找表

分類號：

出版年·卷·期（頁碼）：2010·29·5（457-460）

摘要：

通過對彩色多普勒血流速度自相關(guān)算法中反正切運(yùn)算的分析，針對常用方法的一些不足，描述了一種基于現(xiàn)場可編程門陣列(FPGA)方法的反正切函數(shù)計(jì)算的優(yōu)化方法。該優(yōu)化算法根據(jù)反正切函數(shù)本身的對稱性，能夠極大地減少反正切運(yùn)算耗費(fèi)的硬件資源。通過對其進(jìn)行VHDL語言描述，并經(jīng)綜合器綜合實(shí)現(xiàn)后，集成于 FPGA 應(yīng)用系統(tǒng)上進(jìn)行實(shí)時(shí)性驗(yàn)證。驗(yàn)證結(jié)果證實(shí)該優(yōu)化算法占用資源少，其運(yùn)算速度也能夠很好地滿足彩色多普勒血流計(jì)算的需求。

In this paper, the arc tangent calculation applied to autocorrelation algorithm for color flow mapping was analyzed. In view of some shortcomings in the conventional methods and based on the Field－Programmable Gate Array(FPGA), a new way for arc tangent calculation was designed. Because the arc tangent reduced look-up table(LUT) bulk, the optimization algorithm greatly saved the hardware resources. This optimization method programmed with the VHDL language，was integrated by the synthesizer, then downed to the FPGA circuit system for real-time validation. Finally it was proven that the optimization algorithm only took up a few resources，and its operation speed could also meet the requirement of color Doppler flow calculation.

參考文獻(xiàn)：

［1］張平,劉影,高興斌,等.超聲多普勒自相關(guān)彩色血流成像原理和數(shù)字實(shí)現(xiàn)技術(shù)研究［J］.中國醫(yī)療器械雜志,2001,25(1):1-5.
［2］鄧建奇,劉東權(quán),周激流,等. 一種實(shí)時(shí)超聲血流速度的估算與顯示方法評論推薦［J］. 生物醫(yī)學(xué)工程學(xué)雜志,2007,24(3):530-533.
［3］劉立峰,李太寶.以DSPs實(shí)現(xiàn)彩超系統(tǒng)主要算法的性能評價(jià)［J］.微處理機(jī),2005,4(8):73-78.
［4］Chris Basoglu,Yongmin Kim. A real-time Algorithm for Generatting Color Doppler Ultrasound Images onCommercially-Available Microproces sors［J］.The International Society for Optical Engineering,1997,3031:385-396.
［5］Liu L, Hu YS. Digital signal processing with field programmable gate arrays［M］.Beijing: Tsinghua University Press, 2003:79-87.
［6］劉禮剛，曾延安，常大定.基于FPGA的反正切函數(shù)的優(yōu)化算法［J］.微計(jì)算機(jī)信息,2007,23(17):203-204.

服務(wù)與反饋：

【文章下載】【加入收藏】

提示：您還未登錄，請登錄！點(diǎn)此登錄

51黑料吃瓜在线观看,51黑料官网|51黑料捷克街头搭讪_51黑料入口最新视频