Title: Method for correcting inhomogeneity of spatial intensity in acquired MR image
Application Number: 97125951 Application Date: 1997.12.30
Publication Number: 1191709 Publication Date: 1998.09.02
Approval Pub. Date: 2004.09.29 Granted Pub. Date: 2004.09.29
International Classifi-cation: A61B5/055;G01R33/565
Applicant(s) Name: General Electric Co. Address:
Inventor(s) Name: Gopal B. Avinash
Attorney & Agent: wang yong
Abstract:
    A method is provided for correcting an imaging function g acquired by and MR surface coil having associated spatial inhomogeneity. A shrinking operation is applied to the function g. Pixels of the function gshrunk are compared with a threshold value to produce a thresholded function THRESH[g]shrunk and a low pass filtering operation is applied to both gshrunk and THRESH[g]shrunk to generate filtered shrunk and filtered thresholded functions, respectively. A first function representing the filtered shrunk function is divided by a second function representing the filtered thresholded function to produce a distortion function hshrunk. The function hshrunk is expanded to provide a distortion function h, representing a profile of the spatial inhomogeneity. Acquired function g and the computed distortion function h are used to provide a corrected function f, and effects of the inhomogeneity have been substantially reduced.
Time: 18