X-ray imaging apparatus that displays analysis image with taken image, X-ray imaging method, and image processing apparatus
View Patent ↗Positioning images are created by a projection-image creating unit before imaging, and the positioning images are grouped and stored by a projection-image storage unit for each preset. When imaging is started, a positioning-information calculating unit calculates positioning parameters using the positioning images stored in the projection-image storage unit. An analysis-image-for-synthesis creating unit creates an analysis image using the positioning parameters, and an analysis-image synthesizing and displaying unit synthesizes the analysis image with a live image and displays a synthesized image. When an imaging direction of an X-ray angiography apparatus is changed, a positioning-information updating unit directly updates the positioning parameters based on an amount of change of the imaging direction.
1. An image processing apparatus comprising:
an image obtaining unit that obtains an X-ray projection image of a subject;
a positioning-image creating unit connected to the image obtaining unit for creating positioning images with a subject center being changed within a certain range, under a condition that a point of view and a projection plane are fixed, for each of a plurality of different projection conditions using volume data collected from the subject by a medical imaging apparatus;
a projection-condition obtaining unit connected to the positioning-image creating unit for selecting an image most analogous to the X-ray projection image of the subject from the positioning images, and obtains a projection condition of the selected positioning image;
a target-region storage unit that stores volume data of a target region, among the volume data collected, as target-region volume data; and
an image display unit connected to the target-region storage unit and the projection-condition obtaining unit for creating and displaying an image of the target region based on the target-region volume data stored in the target-region storage unit and the projection condition obtained by the projection-condition obtaining unit.
2. An X-ray imaging apparatus comprising:
an imaging unit that irradiates X-rays on a subject and detects X-rays penetrating the subject to generate an X-ray projection image of the subject;
a positioning-image creating unit connected to the imaging unit for creating positioning images with a subject center being changed within a certain range, under a condition that a point of view and a projection plane are fixed, for each of a plurality of different projection conditions using volume data collected from the subject by a medical imaging apparatus;
a projection-condition obtaining unit connected to the positioning-image creating unit for selecting an image most analogous to the X-ray projection image of the subject from the positioning images, and obtains a projection condition of the selected positioning image;
a target-region storage unit that stores volume data of a target region, among the volume data collected, as target-region volume data; and
an image display unit connected to the target-region storage unit and the projection-condition obtaining unit for creating and displaying an image of the target region based on the target-region volume data stored in the target-region storage unit and the projection condition obtained by the projection-condition obtaining unit.
3. The X-ray imaging apparatus according to claim 2 , further comprising a synthesized-image display unit that synthesizes an image created by the image display unit with an X-ray projection image being taken, and displays a synthesized image.
4. The X-ray imaging apparatus according to claim 3 , further comprising a projection-condition updating unit that updates the projection condition corresponding to a change of an imaging condition based on the obtained projection condition, when the imaging condition of the subject is changed.
5. The X-ray imaging apparatus according to claim 4 , wherein
the synthesized-image display unit can simultaneously display a plurality of types of images, and
the X-ray imaging apparatus further comprises a display setting unit that sets a plurality of types of images and display positions displayed by the synthesized-image display unit.
6. The X-ray imaging apparatus according to claim 3 , wherein the positioning-image creating unit has a function of creating a plurality of positioning images beforehand for each imaging condition preset in the X-ray imaging apparatus and storing the positioning images in an image database, and
the projection-condition obtaining unit has a function of selecting the positioning images corresponding to the imaging condition selected at a time of X-ray imaging of the subject from the image database.
7. The X-ray imaging apparatus according to claim 6 , wherein
the synthesized-image display unit can simultaneously display a plurality of types of images, and
the X-ray imaging apparatus further comprises a display setting unit that sets a plurality of types of images and display positions displayed by the synthesized-image display unit.
8. The X-ray imaging apparatus according to claim 3 , further comprising a target-region selecting unit that selects a target region to be synthesized and displayed from a plurality of target regions, wherein
the target-region storage unit stores volume data of the target regions, and
the image display unit creates and displays an image of the target region selected by the target-region selecting unit.
9. The X-ray imaging apparatus according to claim 8 , wherein
the synthesized-image display unit can simultaneously display a plurality of types of images, and
the X-ray imaging apparatus further comprises a display setting unit that sets a plurality of types of images and display positions displayed by the synthesized-image display unit.
10. The X-ray imaging apparatus according to claim 2 , wherein
the synthesized-image display unit can simultaneously display a plurality of types of images, and
the X-ray imaging apparatus further comprises a display setting unit that sets a plurality of types of images and display positions displayed by the synthesized-image display unit.
11. The X-ray imaging apparatus according to claim 2 , further comprising a projection-condition updating unit that updates the projection condition corresponding to a change of an imaging condition based on the obtained projection condition, when the imaging condition of the subject is changed.
12. The X-ray imaging apparatus according to claim 11 , wherein the positioning-image creating unit has a function of creating a plurality of positioning images beforehand for each imaging condition preset in the X-ray imaging apparatus and storing the positioning images in an image database, and
the projection-condition obtaining unit has a function of selecting the positioning images corresponding to the imaging condition selected at a time of X-ray imaging of the subject from the image database.
13. The X-ray imaging apparatus according to claim 11 , further comprising a target-region selecting unit that selects a target region to be synthesized and displayed from a plurality of target regions, wherein
the target-region storage unit stores volume data of the target regions, and
the image display unit creates and displays an image of the target region selected by the target-region selecting unit.
14. The X-ray imaging apparatus according to claim 2 , wherein the positioning-image creating unit has a function of creating a plurality of positioning images beforehand for each imaging condition preset in the X-ray imaging apparatus and storing the positioning images in an image database, and
the projection-condition obtaining unit has a function of selecting the positioning images corresponding to the imaging condition selected at a time of X-ray imaging of the subject from the image database.
15. The X-ray imaging apparatus according to claim 14 , further comprising a target-region selecting unit that selects a target region to be synthesized and displayed from a plurality of target regions, wherein
the target-region storage unit stores volume data of the target regions, and
the image display unit creates and displays an image of the target region selected by the target-region selecting unit.
16. The X-ray imaging apparatus according to claim 2 , further comprising a target-region selecting unit that selects a target region to be synthesized and displayed from a plurality of target regions, wherein
the target-region storage unit stores volume data of the target regions, and
the image display unit creates and displays an image of the target region selected by the target-region selecting unit.
17. The X-ray imaging apparatus according to claim 2 , wherein
the volume data is time-series volume data,
the X-ray imaging apparatus further comprises a volume-data extracting unit that extracts one time-phase volume data from the time-series volume data, and
the positioning-image creating unit creates a plurality of positioning images based on an imaging condition of the X-ray imaging apparatus, using the volume data extracted by the volume-data extracting unit.
18. An X-ray imaging method comprising:
irradiating X-rays on a subject;
detecting X-rays penetrating the subject;
generating an X-ray projection image of the subject;
creating positioning images with a subject center being changed within a certain range, under a condition that a point of view and a projection plane are fixed, for each of a plurality of different projection conditions using volume data collected from the subject by a medical imaging apparatus;
selecting an image most analogous to the X-ray projection image of the subject from the positioning images;
obtaining a projection condition of the selected positioning image;
storing volume data of a target region, among the volume data collected, as target-region volume data; and
creating and displaying an image of the target region based on the target-region volume data and the projection condition.