2016 Fiscal Year Final Research Report
Localization and Alignment of Non-rigid Organs by Exhaustive Search of Position, Orientation,Scale and Deformation Parameters
Project/Area Number |
26330212
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Perceptual information processing
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Research Institution | Ritsumeikan University |
Principal Investigator |
Xu Gang 立命館大学, 情報理工学部, 教授 (90226374)
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Keywords | 画像認識 / 医用画像処理 / 3次元 / アラインメント / 変形 / ボリュームデータ / CT / MRI |
Outline of Final Research Achievements |
This research shows that against the intuition of impossibility of exhaustive search of a relatively large number of parameters, by a number of techniques to reduce computational cost, we succeeded in localization and alignment of livers in MR volume data by exhaustive search of 15 parameters including 3 for position, 3 for orientation, 1 for scale, and 8 for deformation. Deformation is represented as a linear combination of principal components of a set of some 50 aligned 3D sample models. Using GPU for acceleration, we were able to find livers withour any human intervention at a speed of 1.5 minutes, which is now manually done by human operators at a speed of half a day.
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Free Research Field |
三次元画像認識
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