本文關(guān)鍵詞：一種分割腦磁共振圖像的改進(jìn)FCM聚類算法　出處：《中國(guó)生物醫(yī)學(xué)工程學(xué)報(bào)》2016年06期 　論文類型：期刊論文

  更多相關(guān)文章： 腦MRI圖像 噪聲 偏移場(chǎng) FCM算法 圖像分割

【摘要】：噪聲和偏移場(chǎng)是影響磁共振(MRI)圖像質(zhì)量的主要因素。以含加性噪聲和乘性偏移場(chǎng)的腦MRI圖像組織分割為目標(biāo),提出一種抗噪局部相干模糊聚類算法,通過在目標(biāo)函數(shù)中加入模糊算子和一致局部信息約束,達(dá)到同時(shí)抑制噪聲和偏移場(chǎng)不利影響的目的,提高分割準(zhǔn)確性和穩(wěn)定性。采用20例合成圖像、60例來自Brain Web的模擬腦MRI圖像、100例來自IBSR真實(shí)腦MRI圖像,對(duì)算法的聚類性能進(jìn)行評(píng)價(jià)。實(shí)驗(yàn)結(jié)果表明,在噪聲和偏移場(chǎng)干擾并存的情況下,所提出算法與其他幾種經(jīng)典FCM改進(jìn)算法相比,對(duì)合成圖像集的平均分類準(zhǔn)確度SA達(dá)到0.97,高于其他算法,最大可提高0.37;對(duì)真實(shí)腦MRI圖像集的腦脊液分割有明顯優(yōu)勢(shì),相似性測(cè)度KI平均提高約0.1。分析表明,所提出算法有更好的分類準(zhǔn)確性和穩(wěn)定性。
[Abstract]:The noise and bias field magnetic resonance (MRI) effect is the main factors of image quality. The brain MRI images containing additive noise and multiplicative bias field segmentation as the goal, proposed an anti noise local coherent fuzzy clustering algorithm, by adding fuzzy constraint operator and consistency of bureau of the Ministry of information in the objective function, at the same time objective to suppress noise and offset the adverse effects of the field, improve the segmentation accuracy and stability. 20 cases of the use of synthetic images, simulated brain MRI images of 60 cases from Brain Web, 100 cases of IBSR from real brain MRI images, evaluate the performance of the clustering algorithm. The experimental results show that the noise and offset field interference under the condition of coexistence the proposed algorithm, and several other classical FCM algorithm compared to the average classification accuracy of the synthetic image set of SA reached 0.97, higher than that of other algorithms can be increased by 0.37; the CSF MRI image set real brain The cutting has obvious advantages. The similarity measure of KI is improved by 0.1. analysis. The results show that the proposed algorithm has better classification accuracy and stability.

【作者單位】： 大連理工大學(xué)電子信息與電氣工程學(xué)部;國(guó)網(wǎng)遼寧省電力有限公司大連供電公司;大連醫(yī)科大學(xué)附屬第二醫(yī)院;
【基金】：國(guó)家自然科學(xué)基金(61101230)
【分類號(hào)】：R445.2;TP391.41
【正文快照】： 引言磁共振成像(magnetic resonance imaging,MRI)是使人體內(nèi)部組織結(jié)構(gòu)可視化的一種成像技術(shù),對(duì)軟組織具有較清晰的成像效果。作為一種非介入檢測(cè)手段,MRI已經(jīng)廣泛應(yīng)用在臨床診療中。腦組織的正確分割,對(duì)病灶位置、體積的確定和治療方案的制定具有重要意義。然而,受設(shè)備性能，

本文編號(hào)：1358429