jack810914/ct_filtered-back-projection

A Chinese software that shows how "filtered back projection (parallel beam)" algorithm in CT works. It may be helpful if you are getting started in this area. You may open the video: https://www.bilibili.com/video/BV1od4y1K71J/?spm_id_from=333.999.0.0&vd_source=6968856c8aca1ad25b542920e96c4e43 for further illustration.

You may open the video: https://www.bilibili.com/video/BV1od4y1K71J/?spm_id_from=333.999.0.0&vd_source=6968856c8aca1ad25b542920e96c4e43 for further illustration.

Introduction

该软件面向 CT滤波反投影算法的初学者，希望通过参数的交互，让使用者加深对该算法的理解。

编程及项目管理：Visual Studio 2019

图像处理：openCV 4.4.0（C++）

交互式界面设计：Qt 5.12.2（C++）

包含数字积分法和解析法（shepplogan模型）投影、S-L滤波、反投影过程。

用户交互性强，支持多个参数的修改。

本地图片支持彩色输入（输出为灰度图），支持长方形图片输入，图像类型支持*.png,.jpg,.bmp。

提供重建评价指标，便于重建效果评估。

注：该软件仅展示了平行束滤波反投影算法（不包含扇形束、锥形束等）

FILES

├── CT_application_boxed.exe               	// a software that can run independently
├── Test_pictures/         					
│   └── shepplogan.png       				// shepplogan-Created by program
├── Files/									//Illustration Files
│   ├── Introduction_of_What_These_Codes_Mean.pdf 
│   └── How_to_Use_the_Software.pdf        
├── Codes/              					// all the codes
│   ├── 1_CT_codes (without GUI)/	           	
│   └──	2_CT_application (with GUI)/			

Reference

1. Projection of SheppLogan Model parameters and analytic method

Avinash C. Kak, and Malcolm Slaney, “Principles of Computerized Tomographic Imaging”, IEEE Press, 1999. https://engineering.purdue.edu/~malcolm/pct/，Chapter 3. Algorithms for Reconstruction with Nondiffracting Sources.

2. integral projection algorithm

Siddon, Robert L. "Fast calculation of the exact radiological path for a three‐dimensional CT array." Medical physics 12.2 (1985): 252-255.