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三維超聲系統(tǒng)越來(lái)越多地被應(yīng)用到微創(chuàng)手術(shù)過(guò)程中,但是,在三維超聲系統(tǒng)使用前必須對(duì)三維超聲系統(tǒng)進(jìn)行標(biāo)定求解出超聲圖像平面坐標(biāo)系和附屬在超聲探頭上定位裝置坐標(biāo)系之間的轉(zhuǎn)換關(guān)系,傳統(tǒng)的標(biāo)定方法比較繁瑣,為此,開發(fā)了一種多"N"形線框標(biāo)定模板.首先自動(dòng)提取幾張圖像的特征點(diǎn),利用相似三角形原理,得到超聲圖像特征點(diǎn)在模板中的同源點(diǎn),利用直接求解方法快速地標(biāo)定出結(jié)果.實(shí)驗(yàn)結(jié)果證明,整個(gè)標(biāo)定過(guò)程在3min之內(nèi),滿足臨床應(yīng)用的需求,同時(shí),該方法同樣具有高精度.

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