Layer Display of Volume Data

• US 20140049542A1
• Filed: 08/15/2013
• Published: 02/20/2014
• Est. Priority Date: 08/16/2012
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Engel, Klaus
• Application Number:
  US13/968,041
• Publication Number:
  US 20140049542A1
• Time in Patent Office: Days
• US Class Current: 345/426
• CPC Class Codes: G06T 15/08 Volume rendering
• CPC Class Codes: G06T 15/506 Illumination models
• CPC Class Codes: G06T 15/83 Phong shading
• CPC Class Codes: G06T 19/20 Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts

Abstract

A layer display of volume data is provided. A layer orientation for the layer display of the volume data is selected. At least one layer is calculated in accordance with the selected orientation. A virtual light source is selected for the inclusion of light effects in the display of the layers. A calculation is performed of a light effect generated by the virtual light source with the help of a reflection model for the at least one layer. The at least one layer is displayed, taking account of the light effect.

Claims

1. A method for layer display of volume data, the method comprising:

selecting a layer orientation for a layer display of volume data;

calculating at least one layer in accordance with the selected layer orientation;

selecting a virtual light source for inclusion of light effects when displaying layers;

calculating a light effect generated by the virtual light source with the help of a reflection model for the at least one layer; and

displaying the at least one layer, taking account of the light effect.

2. The method as claimed in claim 1, further comprising:

recording measured data in connection with an imaging method; and

determining the volume data from the recorded measured data.

3. The method as claimed in claim 1, wherein the layer display is effected in connection with a multi-planar reconstruction (MPR) procedure.

4. The method as claimed in claim 1, wherein the reflection model is a local reflection model based on modification of a pixel calculation, and

wherein the method further comprises:

determining, using a locally calculated gradient, a portion occasioned by diffuse scattered light due to the reflection model; and

using, for the locally calculated gradient, a weighted sum from a normal vector determined for the at least one layer and a gradient determined with at least one plane from the volume data at an intersection point of a beam generated for pixel calculation.

5. The method as claimed in claim 1, wherein Phong shading or a local reflection model is used as the reflection model.

6. The method as claimed in claim 2, wherein the layer display is effected in connection with a multi-planar reconstruction (MPR) procedure.

7. The method as claimed in claim 2, wherein the reflection model is a local reflection model based on modification of a pixel calculation, and

wherein the method further comprises:

determining, using a locally calculated gradient, a portion occasioned by diffuse scattered light due to the reflection model; and

using, for the locally calculated gradient, a weighted sum from a normal vector determined for the at least one layer and a gradient determined with at least one plane from the volume data at an intersection point of a beam generated for pixel calculation.

8. The method as claimed in claim 3, wherein the reflection model is a local reflection model based on modification of a pixel calculation, and

wherein the method further comprises:

determining, using a locally calculated gradient, a portion occasioned by diffuse scattered light due to the reflection model; and

using, for the locally calculated gradient, a weighted sum from a normal vector determined for the at least one layer and a gradient determined with at least one plane from the volume data at an intersection point of a beam generated for pixel calculation.

9. The method as claimed in claim 2, wherein Phong shading or a related local reflection model is used as the reflection model.

10. The method as claimed in claim 3, wherein Phong shading or a related local reflection model is used as the reflection model.

11. The method as claimed in claim 4, wherein Phong shading or a related local reflection model is used as the reflection model.

12. A device for layer display of volume data, the device comprising:

an input interface for selecting an orientation of layers for a layer display of volume data;

a computing element configured to;

calculate layers in accordance with the selected orientation; and

calculate a light effect generated by a virtual light source with a reflection model for at least one of the layers, the virtual light source being automatically or manually selectable for inclusion of light effects when displaying the layers; and

a screen configured to display the at least one layer, taking account of the light effect.

13. In a non-transitory computer-readable storage medium that stores instructions executable by a computer for layer display of volume data, the instructions comprising:

selecting a layer orientation for a layer display of volume data;

calculating at least one layer in accordance with the selected layer orientation;

determining a virtual light source for inclusion of light effects when displaying layers;

calculating a light effect generated by the virtual light source with the help of a reflection model for the at least one layer; and

displaying the at least one layer, taking account of the light effect.

14. The non-transitory computer-readable storage medium as claimed in claim 13, wherein the instructions further comprise:

recording measured data in connection with an imaging method; and

determining the volume data from the recorded measured data.

15. The non-transitory computer-readable storage medium as claimed in claim 13, wherein the layer display is effected in connection with a multi-planar reconstruction (MPR) procedure.

16. The non-transitory computer-readable storage medium as claimed in claim 13, wherein the reflection model is a local reflection model based on modification of a pixel calculation, and

wherein the instructions further comprise:

determining, using a locally calculated gradient, a portion occasioned by diffuse scattered light due to the reflection model; and

using, for the locally calculated gradient, a weighted sum from a normal vector determined for the at least one layer and a gradient determined with at least one plane from the volume data at an intersection point of a beam generated for pixel calculation.

17. The non-transitory computer-readable storage medium as claimed in claim 13, wherein Phong shading or a local reflection model is used as the reflection model.

18. The non-transitory computer-readable storage medium as claimed in claim 14, wherein the layer display is effected in connection with a multi-planar reconstruction (MPR) procedure.

19. The non-transitory computer-readable storage medium as claimed in claim 14, wherein the reflection model is a local reflection model based on modification of a pixel calculation, and

wherein the instructions further comprise:

determining, using a locally calculated gradient, a portion occasioned by diffuse scattered light due to the reflection model; and

using, for the locally calculated gradient, a weighted sum from a normal vector determined for the at least one layer and a gradient determined with at least one plane from the volume data at an intersection point of a beam generated for pixel calculation.

20. The non-transitory computer-readable storage medium as claimed in claim 14, wherein Phong shading or a local reflection model is used as the reflection model.