Description: 图像重建常常被转化为解非线性无约束极值问题, 通过范数极小化推导出共扼梯度法的
一般算法。通过对模拟数据和实际工件断层扫描数据进行图像重建, 估计了算法的有效性, 结果表明, 与最速下降法相比, 此算法更适用于不完全投影数据的图像重建, 在保证重建图像拟合度的同时, 大大提高了重建速度。-Image reconstruction has often been transformed into solving nonlinear unconstrained extremum problem, through the norm minimization derived conjugate gradient method the general algorithm. Through the simulation data and actual data workpiece tomography image reconstruction, it is estimated that the effectiveness of the algorithm, the results showed that compared to steepest descent method, this algorithm is more applicable to incomplete projection data image reconstruction, in ensuring that the reconstructed image fit at the same time, greatly improving the speed of reconstruction. Platform: |
Size: 364544 |
Author:孙翔 |
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Description: CT算法中很经典一个算法 读者可以直接使用 系统矩阵可以套用以前的-Computed tomography (CT) algorithm is classic reader can directly use an algorithm to the system matrix can be used Platform: |
Size: 1024 |
Author:sb |
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Description: 简单计算机层析成像投影图像仿真软件,具体功能为射线与图像相交，所得到的线段的长度。用于X射线投影有关用途。-Simple computer tomography projection image simulation software, the specific function is getting the segment length of the ray with the image. It is for X-ray projection . Platform: |
Size: 4014080 |
Author:刘旸 |
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Description: 用Matlab实现的后向投影算法，一个经典的投影算法，常用语CT断层成像中-After using Matlab implementation of the algorithm to the projection, the projection of a classical algorithm, commonly used terms in CT tomography Platform: |
Size: 2048 |
Author:九龙 |
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Description: matlab应用于医学数字信号处理的外文参考文献，既有程序也有理论说明。-Digital signal processing (DSP) techniques, like Radon transformation, Projection
techniques, Fourier transformation in polar form, Hankel transformation, etc., are
used in Medical imaging techniques like Computed Tomography (CT) and
Magnetic Resonance Imaging (MRI) during the process of imaging Platform: |
Size: 5510144 |
Author:罗雨轩 |
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Description: PARALLEL-BEAM TOMOGRAPHIC IMAGE RECONSTRUCTION
This projects reproduces results of procedures regarding CT Image Reconstruction. The application will applied to computed tomography single photon emission (SPECT) data . In particular, the following steps-commands are used : reading / presenting two-dimensional sectional image data using function normalization volume [0,1] output intersection projections (imitonogramma - transformation radon 360 angles) using linear (linear) interpolation , projection filter (filter setting a cut-off frequency of the filter 90 of the maximum frequency), and the end use of iradon function for reconstruction. The results in the reconstructed images are compared on the basis of specific data line (improfile)-PARALLEL-BEAM TOMOGRAPHIC IMAGE RECONSTRUCTION
This projects reproduces results of procedures regarding CT Image Reconstruction. The application will applied to computed tomography single photon emission (SPECT) data . In particular, the following steps-commands are used : reading / presenting two-dimensional sectional image data using function normalization volume [0,1] output intersection projections (imitonogramma - transformation radon 360 angles) using linear (linear) interpolation , projection filter (filter setting a cut-off frequency of the filter 90 of the maximum frequency), and the end use of iradon function for reconstruction. The results in the reconstructed images are compared on the basis of specific data line (improfile) Platform: |
Size: 404480 |
Author:staNou |
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Description: 图像重建的最典型的应用是医学上的计算机断层摄影技术（CT技术）。它用于人体头部、腹部等内部器官的无损伤诊断，其基本方法就是根据人体截面投影，经过计算机处理来重建截面图像。在人体中把需要扫描的部分取出一定厚度的断层面，再把断层面分成许多小的方块。当一束较窄的射线通过每个方块后强度就有一定程度的衰减，衰减的量由此方块的分子构成和组织密度决定。如果通过各种角度重复上述过程以获得一系列强度分布曲线，就有可能从这些数据中计算每一方块的衰减量。这样就能够重建断层或三维图像。(The most typical application of image reconstruction is computed tomography (CT) technique in medicine. It is used in the diagnosis of internal organs such as the head and abdomen, and the basic method is to reconstruct the cross-section image according to the projection of the human body. In the human body, the part that needs to be scanned takes out a certain thickness of the fault plane, and then divides the fault plane into many small squares. When a narrow beam of radiation passes through each square, the intensity has a certain degree of attenuation, and the amount of attenuation is determined by the molecular composition and organizational density of the square. If the process is repeated in various ways to obtain a series of intensity distribution curves, it is possible to calculate the attenuation of each square from these data. This allows the reconstruction of a fault or a three-dimensional image.) Platform: |
Size: 10240 |
Author:梁LHM |
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Description: Computerized Tomographic Imaging Simulation with Fan Beam Projection and Algebraic Reconstruction
This repo contains a Matlab simulation for the Computerized Tomography using x-rays. In this work four different algorithms are implemented; ART, SART, SIRT, M-SART (Modified SART). With the help of GUI parameters such as: image size, distance of ray projector, number of detectors and projection angle step size can be adjusted. Also tests can be ran for varying number of these parameters. Platform: |
Size: 195599 |
Author:835695959@qq.com |
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Search - tomography projection