Proposed a new structure of cone-beam volume CT, which adopts a raster scanning x-ray source on a trough-like surface, and a group of point detectors or linear array detectors distributing on a large circle plus an orthogonal line.

提出一種基于柵形掃描的凹面源和點狀或線狀探測器的錐形束CT的掃描結(jié)構(gòu)99热精品区，簡稱單次旋轉(zhuǎn)的直接體積CT8x成年视频在线观看免费，已申請國家發(fā)明專利，申請?zhí)枮椋?/p>

First, orthogonal circle operator was modeled in terms of Zernike orthogonal complex moment; the one-to-one mapping between the edge point and the parameters of the circle was established by the algorithm. Then, quadratic polynomial interpolation was adopted to further locate the edge points in the gradient direction.

首先根據(jù)Zernike正交復(fù)數(shù)矩建立圓物體邊緣點與邊緣參數(shù)之間的映射關(guān)系女人扒开腿让男人桶白浆动态视频，并提取邊緣點精品丝袜国产在线精品不卡；然后利用二次多項式插值在梯度方向上對提取出的邊緣點進行進一步定位；最后利用最小二乘法擬合插值后的邊緣點天天摸天天，得到亞像素精度的圓參數(shù)免费观看黄网站不卡影院视频。

It uses a small X-ray tube scanning on a cylinder surface to simulate the trough-like source, and a point detector or a linear array detector moving on a circle and an orthogonal line to acquire the projections.

首先，我們用一個小型的X射線源在凹面上沿"Z"字形掃描天天干天天透天天日，來模擬柵形掃描的凹面源客人的黄色一级片操操操。

orthogonal circle：正交圓

orthogonal basis 正交基 | orthogonal circle 正交圓 | orthogonal complement 正交補