Title:
核医学画像中の腫瘍輪郭を抽出する技術
Document Type and Number:
Japanese Patent JP6442311
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a tumor contour extraction program capable of reducing variations in results of extraction done by operators and reducing work to be done by operators in image analysis of nuclear medicine image data.SOLUTION: A computer program for extracting tumor contours from nuclear medicine image data performs steps including; highlighting a region with a tumor; setting a reference point in the highlighted region; scanning pixels three-dimensionally and radially from the reference point; producing a pixel value profile in each scanning direction; producing a gradient strength profile for the pixel value profile or a smoothing-processed version of the pixel value profile; extracting a range in which the pixel value monotonically increases or monotonically decreases from the pixel value profile or the smoothing-processed pixel value profile and designating the extracted range as a contour determination range; and determining tumor contour points in the pixel value profile based on a peak with the maximum kurtosis within the contour determination range on the corresponding gradient strength profile or a smoothing-processed version of the gradient strength profile.SELECTED DRAWING: Figure 7A
Inventors:
Kazuo Hamada
Large Saki Yomitsu
Kazumasa Nishida
Large Saki Yomitsu
Kazumasa Nishida
Application Number:
JP2015019833A
Publication Date:
December 19, 2018
Filing Date:
February 04, 2015
Export Citation:
Assignee:
Nihon Medi-Physics Co., Ltd.
International Classes:
G01T1/161; A61B6/03; G06T1/00
Domestic Patent References:
| JP2013088386A | ||||
| JP2014174654A | ||||
| JP2010004940A | ||||
| JP2007014706A | ||||
| JP2011076198A |
Attorney, Agent or Firm:
Kawamori Mitsunori