--%>

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 Window manager Window manager :

    Window manager: This is a window manager which provides a computer user with a virtual desktop having one or more windows and working regions in which individual programs might be run. Window managers permit the contents of a user's desktop to be arra

  • Q : State De Morgans Theorem De Morgan's

    De Morgan's Theorem: The two rules which can help to simplify Boolean expressions comprising multiple logical-not operators in combination with the other Boolean operators.

  • Q : Define Method header Method header : It

    Method header: It is the header of a method, comprising of the method name, its outcome type, formal arguments and any exceptions thrown. Also termed as a method signature.

  • Q : What is Hash function Hash function : A

    Hash function: A function employed to generate a hash code from the random contents of an object. The classes can override the hash Value method, inherited from the Object class, to state their own hash function.

  • Q : Explain Information hiding Information

    Information hiding: The practice of making sure that only as much information is exposed regarding the implementation of a class as is strictly needed. Hiding needless knowledge of implementation makes it not as much of likely that other classes will

  • Q : Use of System Dynamic and System Runtime

    What is the use of System.Dynamic and System.Runtime.CompilerServices namespaces?

  • Q : What is Leverage Model-Based Design

    Leverage Model-Based Design: Model-based design provides useful hints of how a large system can be reduced so that its state space becomes searchable. If not inherently visible in the design (for example, by means of using a “State” design

  • Q : What is Append mode Append mode : It is

    Append mode: It is a file writing mode, in which the existing contents of a file are maintained whenever the file is opened. Novel contents are appended to the existing.

  • Q : Define Function Function : The name

    Function: The name given to assembly of statements which does some particular task and might return a value. Function can be invoked (or called) any number of time and anywhere in the program.

  • Q : Define Data type Data type : There are

    Data type: There are 8 primitive data types in Java; five of such symbolize numerical types of changeable range and precision - float, double, int, long and short. The remaining three are employed to symbolizing single-bit values (that is, Boolean), s