本文選題：散射信號(hào) + 判斷結(jié)果��； 參考：《聲學(xué)學(xué)報(bào)》2016年03期

【摘要】：在松質(zhì)骨超聲背散射評(píng)價(jià)的實(shí)際應(yīng)用中,如何快速準(zhǔn)確地判斷接收到的信號(hào)中是否包含有效背散射信號(hào)是一個(gè)重要問(wèn)題。提出一種基于譜信息熵的背散射信號(hào)判斷方法。對(duì)在體采集的984例成人跟骨處臨床數(shù)據(jù),采用該方法判斷背散射信號(hào)的有效性,將判斷結(jié)果與經(jīng)驗(yàn)判斷結(jié)果進(jìn)行對(duì)照分析,并分析該方法中的信號(hào)區(qū)間長(zhǎng)度和譜信息熵分段數(shù)對(duì)判斷結(jié)果的影響。結(jié)果表明,當(dāng)信號(hào)區(qū)間長(zhǎng)度為13μs,譜信息熵分段數(shù)為15~20時(shí),該方法可以獲得最佳的判斷結(jié)果(準(zhǔn)確度95%,靈敏度99%,特異度87%),并且計(jì)算時(shí)間極短(1.5 ms)。因此采用譜信息熵方法判斷背散射信號(hào)的有效性,可以滿足超聲骨質(zhì)評(píng)價(jià)中對(duì)準(zhǔn)確性和實(shí)時(shí)性的要求。
[Abstract]:In the practical application of ultrasonic backscattering evaluation of cancellous bone, how to quickly and accurately judge whether the received signal contains the effective backscatter signal is an important problem. A method for judging backscattering signals based on spectral information entropy is proposed. The clinical data of 984 cases of adult calcaneus were collected in vivo. The method was used to judge the validity of backscatter signal. The results were compared with the results of empirical judgment. The influence of signal interval length and spectral entropy segment number on the result of the method is analyzed. The results show that when the signal interval length is 13 渭 s and the spectral entropy segment number is 15 ~ 20:00, the method can obtain the best results (accuracy 95, sensitivity 99th, specificity 87), and the calculation time is very short (1.5 Ms). Therefore, using spectral information entropy method to judge the validity of backscatter signal can meet the requirements of accuracy and real-time in ultrasonic bone evaluation.
【作者單位】： 復(fù)旦大學(xué)電子工程系;復(fù)旦大學(xué)上海市醫(yī)學(xué)圖像處理與計(jì)算機(jī)輔助手術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(11327405,11525416) 上海市科技支撐計(jì)劃(13441901900) 教育部博士點(diǎn)基金(20130071110020)資助
【分類號(hào)】：R580;TN911.6

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 黃凱;他得安;王威琪;Lawrence H.Le;;準(zhǔn)規(guī)則生物組織超聲背散射信號(hào)的仿真[J];儀器儀表學(xué)報(bào);2008年09期

相關(guān)會(huì)議論文 前4條

1 邢貞貞;韓立國(guó);韓利;崔杰;;一種適用于小尺度斷裂的散射信號(hào)分析方法[A];中國(guó)地球物理·2009[C];2009年

2 林俊軒;王寧;;強(qiáng)背景噪聲中提取海底逆散射信號(hào)[A];2004年全國(guó)水聲學(xué)學(xué)術(shù)會(huì)議論文集[C];2004年

3 王愛玲;郭建中;任述科;張晗;;換能器的中心頻率對(duì)超聲背散射信號(hào)頻移量的影響[A];2011'中國(guó)西部聲學(xué)學(xué)術(shù)交流會(huì)論文集[C];2011年

4 黃凱;他得安;王威琪;;松質(zhì)骨超聲背散射信號(hào)頻移參數(shù)成像[A];2008年全國(guó)聲學(xué)學(xué)術(shù)會(huì)議論文集[C];2008年

，

本文編號(hào)：1851912