JP2013027433A5

JP2013027433A5 -

Info

Publication number: JP2013027433A5
Application number: JP2011163688A
Authority: JP
Filing date: 2011-07-26
Publication date: 2014-07-31
Anticipated expiration: 2031-07-26

Description

本発明の目的を達成するため、例えば、本発明の画像処理装置は、被検体のボリュームデータを用いてボリュームレンダリングを行うことで、所望の視点から見た該ボリュームデータの画像を生成するレンダリング手段と、
前記画像を表示する表示手段と
を有する画像処理装置であって、
超音波プローブによって得られる前記被検体の超音波断層像を取得する取得手段と、
前記ボリュームレンダリングの過程で前記ボリュームデータ中の各位置における不透明度を設定する際、該不透明度を求めるために前記視点から追跡する光線が、前記ボリュームデータ中の前記超音波断層像に対応する断面と交差していれば、前記光線において前記ボリュームデータの各位置における不透明度を、前記断面からの距離がより大きい位置における不透明度がより小さくなるように設定するよう前記レンダリング手段を制御する制御手段と
を備えることを特徴とする。 In order to achieve the object of the present invention, for example, the image processing apparatus of the present invention performs rendering of a volume using volume data of a subject, thereby rendering an image of the volume data viewed from a desired viewpoint. When,
An image processing apparatus having display means for displaying the image,
An acquisition means for acquiring an ultrasonic tomographic image of the subject obtained by an ultrasonic probe;
When setting the opacity at each position in the volume data in the volume rendering process, a ray traced from the viewpoint to obtain the opacity corresponds to the ultrasonic tomographic image in the volume data. Control means for controlling the rendering means so as to set the opacity at each position of the volume data in the ray so that the opacity at a position where the distance from the cross section is larger is smaller. It is characterized by including these.

Claims

Rendering means for generating an image of the volume data viewed from a desired viewpoint by performing volume rendering using the volume data of the subject;
An image processing apparatus having display means for displaying the image,
An acquisition means for acquiring an ultrasonic tomographic image of the subject obtained by an ultrasonic probe;
When setting the opacity at each position in the volume data in the volume rendering process, a ray traced from the viewpoint to obtain the opacity corresponds to the ultrasonic tomographic image in the volume data. Control means for controlling the rendering means so as to set the opacity at each position of the volume data in the ray so that the opacity at a position where the distance from the cross section is larger is smaller. An image processing apparatus comprising:

The control means includes
Judgment for determining whether or not a ray passing through the viewpoint and the pixel intersects the cross-section for each pixel on the projection plane arranged between the viewpoint and the volume data to generate the image Means,
If it is determined that a ray passing through the viewpoint and the pixel of interest does not intersect the cross section, a first function that returns greater opacity as the voxel value is larger is selected, and a ray passing through the viewpoint and the pixel of interest is And selecting means for selecting a second function that returns greater opacity as the voxel value is larger and returns smaller opacity as the distance from the cross section is greater,
The rendering means is in the process of volume rendering,
When the selection unit selects the first function, the opacity obtained by inputting the voxel value at each position of the volume data to the first function with respect to the light ray passing through the viewpoint and the pixel of interest. Set the opacity at the position,
When the selection unit selects the second function, the voxel value at each position of the volume data and the distance from the position to the cross-section are input to the second function in the light ray passing through the viewpoint and the target pixel. 2. The image processing apparatus according to claim 1, wherein the opacity at each position in the volume data is set by setting the opacity obtained as a result to the opacity at each position. 3.

Furthermore,
A binary image that detects a region including pixels having a predetermined pixel value in the ultrasonic tomogram as a region of a lesioned part, and represents the region of the lesioned part and a region within the region with different pixel values, or the two A generating unit that generates a filtered image by performing a filtering process using a low-pass filter on the value image;
When the selection unit selects the second function, the rendering unit includes, for each position of the volume data in a ray passing through the viewpoint and the pixel of interest, a perpendicular line drawn from the position to the cross section and the cross section. Obtaining an intersection position, specifying a pixel position at the coordinate position on the binary image corresponding to the intersection position or the coordinate position on the filtered image as a weight value of the position;
The opacity at the position is set as a result of multiplying the opacity obtained from the second function for the position by the weight value of the position for each of the positions. Image processing apparatus.

The image processing apparatus according to claim 1, wherein the display unit further displays the ultrasonic tomographic image.

Rendering means for generating an image of the volume data viewed from a desired viewpoint by performing volume rendering using the volume data of the subject;
An image processing method performed by an image processing apparatus having display means for displaying the image,
An acquisition step in which the acquisition unit of the image processing apparatus acquires an ultrasonic tomographic image of the subject obtained by an ultrasonic probe;
When the control means of the image processing apparatus sets opacity at each position in the volume data in the volume rendering process, a ray traced from the viewpoint to obtain the opacity is included in the volume data. If it intersects the cross section corresponding to the ultrasonic tomographic image, the opacity at each position of the volume data in the ray is set so that the opacity at a position where the distance from the cross section is larger is smaller. And a control step for controlling the rendering means.

The computer program for functioning a computer as each means of the image processing apparatus of any one of Claims 1 thru | or 4.

Rendering means for generating an image of the volume data viewed from a desired viewpoint by performing volume rendering using the volume data of the subject;
Display means for displaying the image;
An image processing apparatus comprising:
An acquisition means for acquiring an ultrasonic tomographic image of the subject obtained by an ultrasonic probe;
When setting the opacity at each position in the volume data in the volume rendering process, a ray traced from the viewpoint to obtain the opacity corresponds to the ultrasonic tomographic image in the volume data. Control means for controlling the rendering means so as to set the opacity at each position of the volume data in the ray according to the distance from the cross section.
An image processing apparatus comprising:

Rendering means for generating an image of the volume data viewed from a desired viewpoint by performing volume rendering using the volume data of the subject;
Display means for displaying the image;
An image processing method performed by an image processing apparatus having
An acquisition step in which the acquisition unit of the image processing apparatus acquires an ultrasonic tomographic image of the subject obtained by an ultrasonic probe;
When the control means of the image processing apparatus sets opacity at each position in the volume data in the volume rendering process, a ray traced from the viewpoint to obtain the opacity is included in the volume data. A control step of controlling the rendering means so as to set the opacity at each position of the volume data in the light beam according to the distance from the cross section if it intersects a cross section corresponding to the ultrasonic tomographic image;
An image processing method comprising:

A computer program for causing a computer to function as each unit of the image processing apparatus according to claim 7.