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US 6,549,645 B1Granted
Image processing method and apparatus adapted for radiotherapy treatment planning using digitally reconstructed radiograph
AssigneesHitachi, Ltd., Hitachi Medical Corporation
InventorsMichio Oikawa, Kenichi Kaneki, Yusuke Shimizu, Youichi Seto
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Abstract
Three-dimensional data is generated by measuring an affected part using a computed tomography unit. Then, color information is allocated so as to correspond to voxel values of the three-dimensional data, and the allocated color information is added up along a ray irradiated from a radiation source. As a result, a digitally reconstructed radiograph (DRR) is generated and displayed.
Claims36
An image processing apparatus comprising:
- a memory for storing three-dimensional data;
- a table for allocating color information so as to correspond to voxel values;
- an operation section for generating a DRR (Digitally Reconstructed Radiograph) by interpolating voxel values on a ray irradiated from a radiation source and adding up color information along the ray, the color information being obtained by converting the interpolated voxel values based on said table;
- and
- a display unit for displaying said generated DRR image.
2 more elements
An image processing apparatus comprising:
- a memory for storing three-dimensional data;
- an operation section for calculating a standard deviation of said three-dimensional data and then calculating a second version of three-dimensional data in which said three-dimensional data is expressed using the standard deviation,
- the operation section for generating a DRR (Digitally Reconstructed Radiograph) by interpolating voxel values of the second version of the three-dimensional data on a ray irradiated from a radiation source and adding up said voxel values interpolated along the ray;
- and
- a display unit for displaying said generated DRR.
2 more elements
An image processing method comprising:
- a step of generating three-dimensional data;
- a step of setting radiation conditions;
- a step of setting a table for allocating color information so as to correspond to voxel values;
- a step of interpolating voxel values on a ray irradiated from a radiation source;
- a step of generating a DRR (Digitally Reconstructed Radiograph) by adding up color information along said ray, the color information being obtained by converting the interpolated voxel values based on said table;
- and
- a step of displaying said DRR generated.
4 more elements
An image processing method comprising:
- a step of generating three-dimensional data;
- a step of calculating a second version of three-dimensional data by calculating a standard deviation of said three-dimensional data;
- a step of setting radiation conditions;
- a step for interpolating voxel values of the second version of the three-dimensional data, on a ray irradiated from a radiation source;
- a step of generating a DRR (Digitally Reconstructed Radiograph) by adding up the voxel values interpolated along said ray;
- and
- a step of displaying said DRR generated.
4 more elements
Dependencies are inferred from the claim text.