defaultalt Technical University of Denmark
CT image of lungs and heart 31655 Medical Imaging Systems
    Main page
DTU Teaching Center for Fast
Ultrasound Imaging
Field II JAJ

Plan

Menu Line

Teams 2023

Menu Line

Course material

Menu Line
Programs
Menu Line

Exercises

Menu Line

Ultrasound Data

Menu Line
CT Data
Menu Line
   Circle phantom
   Shepp-Logan
   Torso
   Thorax
   Head
   Assignment data
Menu Line

Papers

Menu Line

Teachers

Menu Line

Description

Menu Line
Learning objectives
Menu Line
News
Menu Line

About this site

Menu Line


The circle phantom


The development of reconstruction algorithms is greatly eased by using standard phantoms with know properties. The simplest possible phantom consists of a circle centered at the origo of the image. The projection of this phantom is readily understood, and it is suitable for the first testing of a reconstruction algorithm. An image of the phantom is shown below.

Circle phantom

A Matlab function has been made that can generate projection data for this phantom. The file can be found at the ftp-server in the directory:

https://courses.healthtech.dtu.dk/22485/files/ct_programs/pht_circle.m

It is possible to generate images of different sizes and vary the number of projections generated. Instruction are found by writing help pht_circle at the Matlab prompt. The function can also easily be modified for generating off-centered circles and ellipses.


/31545/ct_data/ct_circle.html
Last updated: 8:31 on Thu, 22-Oct-2020