1) Filter back-projection
滤波反投影
1.
The simulation results demonstrate that the boundary of an object,and the boundary and density of a flaw can be distinguished obviously by filter back-projection reconstruction using ρ-filter along the cone in the scanning mode of cone incidence of X-ray source.
对扁平构件的仿真结果表明:在射线源为锥束入射扫描方式下,通过分布在锥面上的ρ滤波器进行滤波反投影重建,得到的重建切片图像能够明显区分物体的边界及内部缺陷的边界和密度,空间分辨率可达到2 lp/mm,密度分辨率达到了1%,验证了该重建算法的可行性。
2.
Its projection data rebin pre-processing method and filter back-projection reconstruction algorithm were deduced.
为解决大尺寸构件快速ICT(Industrial Computed Tomography)成像问题,提出了一种通过检台2次偏置扩大扫描视场的ICT成像方法,并基于三代ICT投影数据存在的冗余特征,推导了它的投影数据重排预处理方法和滤波反投影(FBP,Filter Back-Projection)重建算法。
3.
The fan-beam filter back-projection algorithm is analyzed,and according to the characters of this algorithm,a method to accelerate the running speed of this algorithm is proposed.
介绍了由投影重建图像的基本原理,对扇束滤波反投影重建算法进行了分析,并针对该算法的特点提出了一种提高算法求解速度的方法。
2) filtered back projection
滤波反投影
1.
The filtered back projection(FBP) algorithm is mostly used in image reconstruction at present.
目前CT图像重建算法多采用滤波反投影算法。
2.
Finally the two methods is applied to image reconstruction based on filtered back projection algorithm and the two methods\'influence on the reconstructed image\'s quality is analyzed in the circumstances of different sample interval of projections.
分析了常用的插值技术,从一维插值的角度,从理论和实验两个方面分析了线性插值和样条插值的性能,将两种方法应用到滤波反投影法图像重建中,分析了两种方法在不同的投影采样间隔的情况下对重建图像的质量影响。
3.
Firstly, the method is used to preprocess the projection data of metal region and is reconstruct by filtered back projection(FBP) method.
它先对金属区域投影数据进行自适应衰减和滤波,通过滤波反投影(FBP)重建图像,再利用原始投影数据对金属区域进行最大期望值(EM)重建,最后根据迭代重建的结果,对衰减和滤波后重建的图像中的金属区域进行补偿。
3) filtered backprojection
滤波反投影
1.
We propose a fast filtered backprojection (FBP) algorithm for CT fan- beam involving collinear equispaced detectors.
我们提出了一种快速的扇束等距CT滤波反投影重建算法。
2.
The main work of this paper is as follows:(1)We propose a fast filtered backprojection(FBP) algorithm, which is based on regular hexagonal pixels, for CT fan-beam involving collinear equispaced detectors.
针对以上问题,本文主要工作和创新点如下:(1)提出一种基于正六边形像素的扇束等距滤波反投影(FBP)快速CT图像重建算法。
4) filtered back-projection
滤波反投影
1.
Due to X-ray absorption through plasma region,an iterative algorithm with attenuation correction for axial symmetric reconstruction was proposed based on filtered back-projection(FBP) algorithm.
本文在滤波反投影法(FBP)的基础上,结合X射线在等离子体中的吸收规律,提出了带吸收校正的FBP迭代算法。
5) filter backprojection
滤波反投影
1.
Single circular orbit and filter backprojection is a common method in3-D CT.
在三维CT的图像重建过程中,单圆轨迹锥形束扫描是一种常用的方法,其算法普遍采用滤波反投影的形式(FBP)实现。
6) back projection filtered
反投影滤波
补充资料：滤波反投影或卷积反投影
滤波反投影或卷积反投影
影像学术语。当代影像学设备进行影像重建的数学方法。在直接用扫描后所获得的投影轨迹剖面图反投影重建出的CT图像中，无法避免角度卷入条纹伪影(angular aliasing streaks)造成的模糊和失真。这种现象与被扫描层面的空间频率中高频信息的损失有关。使用一种精密的数学方法去除这种模糊。称为“展现”(unfolding)或去卷积(deconvolution)，即在反投影前使用一种数学的“滤器”或卷积函数对原始数据进行修正，然后再进行反投影。两步数学处理过程合称为滤波(修正后)反投影或卷积(后)反投影。这种方法的优点是处理过程简单，速度快，所得图像逼真、清晰。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条