Radiographic apparatus and method
AssigneeCanon Kabushiki Kaisha
InventorTatsuya Yamazaki
Life of this patent
Estimating the term…
Abstract
A radiographic apparatus for obtaining the radiation image of an object has a phototaking portion for phototaking the radiation image of the object, the phototaking portion being capable of obtaining the data of the radiation image passed through a grid, and a signal processing portion for providing the data of the image of the grid expected when the object is present, the signal processing portion effecting the process of removing the data of the expected image of the grid from the data of the radiation image of the object passed through the grid obtained by said phototaking portion.
Claims26
A radiographic apparatus for obtaining the radiation image of an object, comprising:
- a phototaking unit including a grid, being capable of obtaining radiation image data including grid pattern;
- and
- a processor effecting image processing to remove the grid pattern superimposed on the radiation image data obtained by said phototaking unit, the processor executing division process to divide said radiation image data by predetermined grid image data at each pixel,
- wherein said predetermined grid image data can be modified by said processor to make said predetermined grid image data resemble grid image data superimposed on the radiation image data.
A radiographic method for obtaining a radiation image of an object, comprising the steps of:
- obtaining radiation image data through a grid;
- and
- effecting image processing to remove grid pattern superimposed on the radiation image data, by division processing to divide the radiation image data with the object by predetermined grid image data at each pixel,
- wherein said predetermined grid image data can be modified to make said predetermined grid image data resemble grid image data superimposed on the radiation image data.
A radiographic method for obtaining a radiation image of an object, comprising the steps of:
- obtaining radiation image data through a grid in a state in which the object is absent;
- image-processing the radiation image data obtained through the grid in the state in which the object is absent to thereby obtain the data of the expected image of the grid during the presence of the object;
- obtaining the radiation image data of the object through the grid;
- and
- removing the data of the expected image of the grid from the radiation image data of the object,
- wherein the radiation image data obtained through the grid in the state in which said object is absent is imaginary radiation image data made by a computer.
A radiographic apparatus for obtaining the radiation image of an object, comprising:
- a phototaking unit including a grid, being capable of obtaining radiation image data including a grid pattern;
- a processor effecting image processing to remove the grid pattern superimposed on the radiation image data obtained by said phototaking unit, the processor executing a division process to divide said radiation image data by predetermined grid image data at each pixel,
- wherein said predetermined grid image data is radiation image data obtained by the actual phototaking of a scattered ray generating member instead of the object.
A radiographic method for obtaining a radiation image of an object, comprising the steps of:
- obtaining radiation image data through a grid;
- and
- effecting image processing to remove a grid pattern superimposed on the radiation image data, by division process to divide the radiation image data with the object by predetermined grid image data at each pixel,
- wherein the predetermined grid image data is obtained by effecting radiation image phototaking of a scattered ray generating member instead of the object through the grid.
Dependencies are inferred from the claim text.