--%>
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 : Explain Counters Counter variables are

    Counter variables are commonly used in many computer applications for different purposes. Here is a typical example where a variable is used to measures the progress of some activity of interest:

    Q : Explain One Dimensional array One

    One Dimensional array:1) An array is a continuous memory location having similar kind of data in a single row or single column. Declaration in c++ is as under: const int size = 20;int a[size] or int a[2

    		•
  • Q : "This" Pointer "this" pointer: In C++

    "this" pointer: In C++ uses a unique keyword called "this" to represent a object that

    		•
  • Q : What is Central Processing Unit Central

    Central Processing Unit: The Central Processing Unit (that is, CPU) is the heart of a computer as it is the portion that includes the computer's capability to follow instructions. Each kind of CPU has its own instruction set.

    		•
  • Q : Give some instances of XML DTDs or

    Give some instances of XML DTDs or schemas which you have worked with?

    		•
  • Q : Explain Method overriding Method

    Method overriding: It is a method stated in a super class might be overridden by a method of similar name stated in a sub class. The two methods should have similar name and number and types of formal arguments. Any checked exception thrown by sub-cla

    		•
  • Q : Networking Homework Assignment : A

    Homework Assignment : A Barbershop Problem Due: November 20, 2012 In this assignment, you are asked to write a multithreading problem to simulate the barbershop problem, which is a classical synchronization problem. The problem is taken from William Stallings's Operating Systems: Internals and D

    		•
  • Q : How can I get an exact image in a web

    How can I get an exact image in a web page?

    		•
  • Q : Define Applet Applet : The Applets are

    Applet: The Applets are Java programs based on the Applet or JApplet classes. They are closely related with the capability to give active content within the Web pages. They have numerous features that differentiate them from ordinary Java graphical ap

    		•
  • Q : What is Hash code Hash code : It is a

    Hash code: It is a value returned by a hash function. A hash code can be employed as an index into a random-access data structure, offering a proficient mapping between an object and its position. Employed by classes like HashMap.

    		•