Patent ID: 7747056

Claim:
An image data area extracting system, comprising: a threshold value setting unit configured to set a threshold value for three dimensional image data of an object, the three dimensional image data being derived from an image diagnosis apparatus; an input unit configured to receive an inputted threshold value from a user as the set threshold value; an area managing unit configured to set an existing area of the three dimensional image data and to extract a threshold value area of the three dimensional image data in the existing area based on the threshold value; a three dimensional projection image display unit configured to display a three dimensional projection image by providing three dimensional projection image data to an image display unit, the three dimensional projection image data being constructed from the three dimensional image data included in the existing area, the three dimensional projection image display unit being configured to display the threshold value area; a starting point designating unit configured to designate a starting point for a connected area to be deleted from the three dimensional projection image displayed on the image display unit or a starting point for a connected area being displayed on the image display unit, wherein the input unit is configured to receive an input of the starting point from a user operation on the displayed threshold value area; a connected area extraction unit configured to acquire the threshold value area that connects to the designated starting point as the connected area; and an extracted connected area deleting unit configured to renew the existing area by deleting the connected area, wherein the input unit is configured to receive an additional input from the user for changing the threshold value after the connected area is deleted.