X-ray imaging device and treatment tool recognition method
AssigneeFUJIFILM Healthcare Corporation
InventorsKazuki MATSUZAKI, Toru SHIRAI
Life of this patent
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Abstract
Provided is a technique capable of calculating a three-dimensional position of a treatment tool only by processing an X-ray image without using an external signal of a body movement monitor or the like and capable of eliminating an influence of body movement. A plurality of combinations of a plurality of X-ray images from a plurality of X-ray images acquired at different angles or times are used to obtain a parameter serving as an index of calculation accuracy of a three-dimensional position of a treatment tool for each combination and to calculate the three-dimensional position of the treatment tool based on a combination of X-ray images serving as a parameter having the highest accuracy.
Claims12
An x-ray imaging device, comprising:
- an X-ray source that emits X-rays;
- an X-ray detector that faces the X-ray source across an inspection object;
- a data processing unit that generates an X-ray image of the inspection object based on the X-rays transmitted through the inspection object and detected by the X-ray detector;
- and
- an imaging control unit that controls irradiation and an irradiation angle of the X-rays with respect to the inspection object, wherein
- the data processing unit includes a treatment tool position calculation unit that analyzes the X-ray image of the inspection object and that calculates a three-dimensional position of a treatment tool in the inspection object,
- the imaging control unit controls the X-ray source and the X-ray detector to perform imaging a plurality of times at a plurality of imaging positions having different irradiation angles or within a predetermined angle range of the irradiation angle, and
- the treatment tool position calculation unit includes:
- a parameter calculation unit that calculates a parameter for three-dimensional position calculation of the treatment tool for each combination using a plurality of combinations of two or more X-ray images having different imaging positions among a plurality of X-ray images obtained by performing the imaging a plurality of times;
- a parameter comparison unit that compares parameters of the combinations and that selects a combination as a parameter having the highest accuracy of three-dimensional position calculation;
- and
- a three-dimensional position calculation unit that calculates a three-dimensional position of the treatment tool using the parameter calculated by the parameter calculation unit for the combination selected by the parameter comparison unit.
A treatment tool recognition method of analyzing a plurality of X-ray images obtained by performing imaging a plurality of times at a plurality of imaging positions at which X-ray irradiation angles with respect to an inspection object are different or within a predetermined angle range of the irradiation angles, and recognizing a three-dimensional position of a treatment tool inserted into the inspection object during X-ray imaging, the treatment tool recognition method comprising:
- a parameter calculating step of calculating a parameter for three-dimensional position calculation of the treatment tool for each combination using a plurality of combinations of two or more X-ray images having different imaging positions among the plurality of X-ray images;
- a selecting step of selecting, based on the parameter, a combination that is a parameter having the highest accuracy of three-dimensional position calculation among a plurality of combinations;
- and
- a step of calculating a three-dimensional position of the treatment tool using the parameter calculated in the parameter calculating step for the combination selected in the selecting step.
Dependencies are inferred from the claim text.