Virtual endoscopic image generation device, method, and medium containing program
AssigneeFUJIFILM Corporation
InventorFutoshi Sakuragi
Life of this patent
Estimating the term…
Abstract
A structure extracting unit extracts a structure from a three-dimensional medical image, and a view point determining unit determines a view point position and a direction of line of sight of a virtual endoscopic image. An image generating unit calculates a distance between the view point position and the extracted structure, changes an opacity defined in a color template depending on the distance, and generates, from the three-dimensional medical image, a virtual endoscopic image containing the structure shown according to the color template with the changed opacity viewed from the view point position in the direction of line of sight. A display control unit displays the thus generated virtual endoscopic image on a WS display.
Claims6
A virtual endoscopic image generation device comprising:
- a memory to execute executable instructions;
- and
- a hardware processor to execute the stored instructions, which when executed by the hardware processor cause the hardware processor to perform the following operations:
- obtain a three-dimensional image of a subject containing a plurality of structures;
- extract at least one structure from the three-dimensional image;
- determine a virtual view point position and a virtual direction of line of sight in a body cavity of the subject;
- store a display attribute defined for each of the plurality of structures, the display attribute defining an opacity that is changed depending on a distance from the virtual view point position;
- and
- change the opacity defined in the display attribute of the extracted structure depending on a distance between the virtual view point position and the extracted structure, and generating, from the three-dimensional image, a virtual endoscopic image containing the extracted structure having the display attribute with the changed opacity viewed from the virtual view point position in the direction of line of sight,
- wherein the opacity is chanced such that the opacity is 0 when the distance is equal to or greater than a first threshold value and equal to or smaller than a second threshold value, and the opacity is 1 when the distance is equal to a third threshold value between the first and the second threshold values.
A virtual endoscopic image generation method comprising:
- obtaining a three-dimensional image of a subject containing a plurality of structures;
- extracting at least one structure from the three-dimensional image;
- determining a virtual view point position and a virtual direction of line of sight in a body cavity of the subject;
- and
- changing, depending on a distance between the virtual view point position and the extracted structure, an opacity defined in a display attribute defined for each of the plurality of structures, the display attribute defining the opacity that is changed depending on a distance from the virtual view point position, and generating, from the three-dimensional image, a virtual endoscopic image containing the extracted structure having the display attribute with the changed opacity viewed from the virtual view point position in the direction of line of sight,
- wherein the opacity is changed such that the opacity is 0 when the distance is equal to or greater than a first threshold value and equal to or smaller than a second threshold value, and the opacity is 1 when the distance is equal to a third threshold value between the first and the second threshold values.
A non-transitory recording medium containing a program for causing a computer to carry out a virtual endoscopic image generation method, the method comprising:
- obtaining a three-dimensional image of a subject containing a plurality of structures;
- extracting at least one structure from the three-dimensional image;
- determining a virtual view point position and a virtual direction of line of sight in a body cavity of the subject;
- and
- changing, depending on a distance between the virtual view point position and the extracted structure, an opacity defined in a display attribute defined for each of the plurality of structures, the display attribute defining the opacity that is changed depending on a distance from the virtual view point position, and generating, from the three-dimensional image, a virtual endoscopic image containing the extracted structure having the display attribute with the changed opacity viewed from the virtual view point position in the direction of line of sight,
- wherein the opacity is changed such that the capacity is 0 when the distance is equal to or greater than a first threshold value and equal to or smaller than a second threshold value, and the opacity is 1 when the distance is equal to a third threshold value between the first and the second threshold values.
Dependencies are inferred from the claim text.