Title:
MTF測定方法および装置
Document Type and Number:
Japanese Patent JP4102785
Kind Code:
B2
Abstract:
A method of measuring a modulation transfer function (MTF) includes detecting the center of a line spread function (LSF) image in order to calculate an MTF. For this purpose, an enlarged image of a portion of an image containing the LSF image is created, and binary-coded based on a threshold. A morphological operation is performed on the binary-coded image. Coordinates representing points that define the contour of the resultant image are sampled, and used to work out coordinates representing the center of a circle through Hough transform. The coordinates representing the center are transformed into coordinates representing a point in an original image.
Inventors:
One Seri
Yangon Way
Din Wei
Makoto Gono
Yangon Way
Din Wei
Makoto Gono
Application Number:
JP2004205729A
Publication Date:
June 18, 2008
Filing Date:
July 13, 2004
Export Citation:
Assignee:
GE Medical Systems Global Technology Company LLC
International Classes:
A61B6/03; G01M11/00; G01M11/02; G06F17/00; G06K9/00; G06K9/36; G06T1/00; G06T7/00; G06T7/60
Domestic Patent References:
| JP9204529A | ||||
| JP2001054514A | ||||
| JP2002529187A | ||||
| JP2003522576A |
Attorney, Agent or Firm:
Fujiharu Ijima
Nobushige Samejima
Nobushige Samejima