--%>
Assignment Help - homework help

Simulation of artifacts in CT using MATLAB

How is Simulation of artifacts in CT is done utilizing MATLAB?

E

Expert

Verified

Supposing that one of detectors (at l = l0) of a CT scanner is malfunction, which forever outputs a value of 0, i.e. g(l0, θ) = 0. The malfunctioned detector locates below the object however not in the center of the detector array as illustrated in the figure. The parallel ray geometry is supposed.

(1) If the projections are obtained with this CT scanner, display the sinogram for the object employed in Q1.

(2) Apply the inverse Radon transform to projections to re-construct the object. Display the re-constructed image.

(3) Discuss what types of artifacts are examined in the reconstructed image and what a technician must do to avoid such artifacts?

(4) In the inverse Radon transform (that is, ‘iradon’), use a distinct filter (that is, the default filter is Ram-Lak) and dispaly the reconstructed image. Discuss how and why the re-constructed image is enhanced.

859_matlab.jpg

   Related Questions in Programming Languages

  • Q : What is First in-first out First in,

    First in, first out: It is FIFO semantics of the queue data structure. Items are eliminated in the order in which they arrived in the queue; therefore older items are always eliminated before newer ones.

    		•
  • Q : Explain main quality of unsuitable life

    What are the main quality consequences of selecting an unsuitable life cycle model for a software project?

    		•
  • Q : Compute the Total Shopper Spending in

    Most of the reports produced from the system compute the total dollars in purchases for a shopper. Process the following steps to build a function named TOT_PURCH_SF which accepts a shopper id as input and returns the total dollars which the shopper has spent with com

    		•
  • Q : What is XLink What is XLink? Answer: It

    What is XLink? Answer: It is a part of the XLL specification which is concerned along with specifying links among documents.

    		•
  • Q : What is an Unchecked exception

    Unchecked exception: An exception for which it is not needed to give a local try statement or to propagate through a throws clause stated in the method header. An exception which is not handled will cause program annihilation when it is thrown.

    		•
  • Q : OCIW32 dll error Normal 0 false false

    Normal 0 false false

  • Q : Questions on java class Array 1.

    1. Suppose we have a class A which has a constructor that takes a single integer. (a) After the following statements have been executed, how many A objects will exist

  • Q : Explain Polling Polling : It is the

    Polling: It is the process of repeatedly testing until a situation becomes true. Polling can be incompetent when the time between tests is little compared with the time it will take for the condition to become true or right. A polling thread must slee

    		•
  • Q : Define Number base Number base : The

    Number base: The base employed to interpret the numerical characters. Binary notation is base 2 and decimal notation is base 10, for illustration.

    		•
  • Q : Describe Throw an exception Throw an

    Throw an exception: Whenever an exceptional circumstance occurs in a program - frequently as an outcome of a logical error and exception object is formed and thrown. When the exception is not caught by an exception handler, the program will finish wit

    		•