Hitachi, Ltd.

Hiroyuki Sekiguchi

Koichi Sano

Tetsuo Yokoyama

To efficiently, 3-dimensionally, perspectively project and display the extracting processing procedure of a predetermined region on a 3-dimensional image, the extracting process is executed while observing the displayed image. Further, the process is interrupted as necessary so that the process can progress or be returned. The result of the extraction at the interruption time point is edited on a 2-dimensional image and the result of the edition is immediately reflected onto the 3-dimensional image, so that whether the edition is proper or improper can be decided.

Method for displaying region extracting processing in an image

In a region extraction to be achieved by a concatenated region expansion processing, to improve reliability of extraction results and to reduce loads imposed on the operator, when a region other than an objective region is extracted as a result of the region extraction, a point belonging to the region other than the objective region is specified in a three-dimensional display image to execute deletion of the overflow region.

Method of and apparatus for region extraction in three-dimensional voxel

In order to ensure that region extraction for extracting a specified internal organ can be effected with high reliability, a region expansion method is applied by using a combination of an expansion condition taking the local density change into consideration and an expansion condition taking the global density change into consideration.

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Kawasaki, Japan

Hiroyuki Sekiguchi