【摘要】：空間配準(zhǔn)是計(jì)算機(jī)輔助骨科手術(shù)的關(guān)鍵步驟,配準(zhǔn)精度直接影響導(dǎo)航效果。本文針對(duì)基于二維圖像的視覺配準(zhǔn)方法,通過理論分析和計(jì)算機(jī)仿真,研究該方法常用的雙平面定位標(biāo)尺標(biāo)記點(diǎn)分布拓?fù)鋵?duì)定位精度的影響,得到了標(biāo)記點(diǎn)間距、數(shù)目等因素對(duì)定位精度的影響規(guī)律,給出了定位誤差在空間上的分布特點(diǎn)。研究表明,增加標(biāo)記點(diǎn)的數(shù)目和間距有助于減小定位誤差;并且,在包絡(luò)外接圓半徑相等時(shí),五點(diǎn)四邊形的分布拓?fù)浞绞捷^四點(diǎn)矩形和四點(diǎn)三角形更優(yōu)。
[Abstract]:Spatial registration is a key step in computer aided orthopaedic surgery, and the accuracy of registration directly affects the navigation effect. In this paper, aiming at the visual registration method based on two-dimensional image, through theoretical analysis and computer simulation, the influence of the distribution topology of marking points on the positioning accuracy is studied, and the distance between marking points is obtained. The influence of the number and other factors on the positioning accuracy is discussed, and the distribution characteristics of the positioning error in space are given. It is shown that increasing the number and spacing of marking points is helpful to reduce the location error, and that the distribution topology of five-point quadrilateral is better than that of four-point rectangle and four-point triangle when the radius of envelope outer circle is equal.
【作者單位】： 北京航空航天大學(xué)生物與醫(yī)學(xué)工程學(xué)院;
【基金】：國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)項(xiàng)目(2015AA043201)
【分類號(hào)】：R687;TP391.7

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