Title:
Ｘ線ＣＴにおけるＣＴボリュームの表面抽出方法
Document Type and Number:
Japanese Patent JP7216953
Kind Code:
B2
Abstract:
An isosurface mesh M is generated by extracting voxels having a certain CT value from volume data obtained by X-ray CT. A gradient vector g of a CT value is calculated at each vertex p of the isosurface mesh M. A plurality of sample points S are generated in positive and negative directions of the calculated gradient vector g. Gradient norms N of CT values at the respective generated sample points S are calculated. The vertex p of the isosurface mesh is moved and corrected to a sample point Sm having the maximum norm Nm calculated.
Inventors:
Yutaka Ohtake
Choe Nagai
Satoshi Goto
Seiji Sasaki
Masato now
Choe Nagai
Satoshi Goto
Seiji Sasaki
Masato now
Application Number:
JP2018226040A
Publication Date:
February 02, 2023
Filing Date:
November 30, 2018
Export Citation:
Assignee:
National University Corporation The University of Tokyo
Mitutoyo Corporation
Mitutoyo Corporation
International Classes:
G01N23/046; G01B15/04
Domestic Patent References:
| JP2008257333A | ||||
| JP2018040790A |
Foreign References:
| WO2013005455A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation MTS International Patent Office
Satoshi Takaya
Keisuke Matsuyama
Takashi Fujita
Shuzo Sudo
Satoshi Takaya
Keisuke Matsuyama
Takashi Fujita
Shuzo Sudo