--%>
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 : Different layers in Windows Architecture

    Explain how many different layers comprise in Windows Architecture?

    		•
  • Q : Write a program that prints out 20

    Write a program that prints out 20 random cards form a standard deck of 52 cards. Make sure the program prints out different sets of cards from one run to the next.

    		•
  • Q : Define Mixed Mode Mixed Mode : Permits

    Mixed Mode: Permits domain controllers executing both Windows 2000 and prior versions of Windows NT to co-exist in the domain. In mixed mode, the domain features from prior versions of Windows NT Server are still allowed, whereas some Windows 2000 fea

    		•
  • Q : What is Pointer Arithmetic Pointer

    Pointer Arithmetic: C and C++ provide the ability to modify a pointer’s target address with arithmetic operations. This is used, for example, to index arrays. MyObject* P = ...

    Q : Steps comprised in designing programming

    Write down some of the steps comprised in designing programming?

    		•
  • Q : What is an Integer What is an Integer :

    What is an Integer: It is a negative or positive whole number. The primitive types are: short, byte, int and long are utilized to hold integer values in narrower or broader ranges.

    		•
  • Q : Define Application Application : It is

    Application: It is frequently used, simply as a synonym for the program. Though, in Java, the word is particularly employed of programs with a Graphical User Interface (GUI) which are not applets.

    		•
  • Q : What is Low level programming languages

    Low level programming languages: It is frequently termed as `assembly languages’; these give little more than the fundamental instruction set of a particular Central Processing Unit. Therefore programs written in low level programming languages

    		•
  • Q : Explain Static variable Static variable

    Static variable: It is a static variable defined within a class body. Such a variable fits in to the class as a whole, and is, thus, shared by all objects of the class. The class variable may be employed to define the default value of an instance vari

    		•
  • Q : State Non-modal Non-modal : In this a

    Non-modal: In this a dialog is non-modal when its parent application is not blocked from additional activity whereas the dialog is being revealed.

    		•