--%>
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 Datagram Datagram : It is a

    Datagram: It is a packet of information passed between the two communicating procedures across a network. Both the Transmission Control Protocol (abbreviated as TCP) and the User Datagram Protocol (abbreviated as UDP) are indirectly comprised in sendi

    		•
  • Q : Functions of Interrupts and system calls

    What are the various functions of Interrupts and system calls?

    		•
  • Q : Define Implements clause Implements

    Implements clause: That part of a class header which points out which interfaces are applied by the class. A class might implement for more than one interface.

    		•
  • Q : Define Octal Octal : Number

    Octal: Number representation of octal is base 8. In base 8, simply the digits 0 to 7 are employed. Digit positions symbolize successive powers of 8.

    		•
  • Q : XPATH selector Normal 0 false false

    Normal 0 false false

  • Q : Define Race hazard Race hazard : It is

    Race hazard: It is a situation which occurs between multiple threads sharing a resource. The race hazard occurs whenever one thread's suppositions regarding the state of a resource are invalidated by the actions of the other thread.

    		•
  • Q : What is Binary operator Binary operator

    Binary operator: It is an operator taking two operands. Java has numerous binary operators, like the arithmetic operators +, -, *, / and %, and the Boolean operators &&, || and ^, among others.

    		•
  • Q : Use the Processing program for the

    1. Here is a short program. It prints out the value of a variable "x". Ernie and Bert disagree about what will be printed: Ernie says, the value gets changed in "changeX" so it will print "7", and Bert says, no, when the function exits the changes get reversed and the value goes back to "5". Expl

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

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

    		•
  • Q : State Cout and Cin Cout: This is an

    Cout: This is an object of ostream_withassign class stated in iostream.h header file

    		•