RADIOGRAPHIC IMAGING SYSTEM, CONTROL METHOD, AND STORAGE MEDIUM

• US 20160287202A1
• Filed: 03/28/2016
• Published: 10/06/2016
• Est. Priority Date: 03/31/2015
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Miyachi, Norihiko
• Granted Patent: US 9,949,707 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 6/4266 characterised by using a plurality of detector units A61B6/4014 takes precedence
• CPC Class Codes: A61B 6/461 Displaying means of special interest
• CPC Class Codes: A61B 6/5241 combining overlapping images of the same imaging modality, e.g. by stitching

Abstract

A radiographic imaging system, which includes a plurality of radiographic imaging apparatuses each configured to acquire a radiographic image and a processing unit configured to combine a plurality of the radiographic images acquired from the plurality of radiographic imaging apparatuses to generate a stitched image, includes a correction image data determination unit configured to determine correction image data based on an irradiation condition of radiation to be emitted from the radiation source, and an image correction unit configured to correct an area of the stitched image corresponding to an area in which the plurality of radiographic imaging apparatuses overlap, by using the correction image data.

Claims

1. A radiographic imaging system including a plurality of radiographic imaging apparatuses each configured to acquire a radiographic image based on radiation emitted from a radiation source and a processing unit configured to combine a plurality of the radiographic images acquired from the plurality of radiographic imaging apparatuses to generate a stitched image, the radiographic imaging system comprising:

a correction image data determination unit configured to determine correction image data based on an irradiation condition of radiation emitted from the radiation source; and

an image correction unit configured to correct an area of the stitched image corresponding to an area in which the plurality of radiographic imaging apparatuses overlap each other, by using the correction image data.

2. The radiographic imaging system according to claim 1, wherein the irradiation condition includes position information about positions of the plurality of radiographic imaging apparatuses and the radiation source.

3. The radiographic imaging system according to claim 2, wherein the position information includes an incident angle between each of the radiographic imaging apparatuses and radiation emitted from the radiation source.

4. The radiographic imaging system according to claim 1, wherein the irradiation condition includes a value relating to a tube voltage of the radiation source.

5. The radiographic imaging system according to claim 1, wherein the correction image data includes image data including structure information of the radiographic imaging apparatus.

6. The radiographic imaging system according to claim 5, wherein the structure information includes information about a casing of the radiographic imaging apparatus or at least one of thickness and arrangement of a part housed in the casing.

7. The radiographic imaging system according to claim 1, further comprising a storage unit configured to store a plurality of pieces of the correction image data,

wherein, the correction image data determination unit determines correction image data to be used for correction of the stitched image based on the plurality of pieces of correction image data stored in the storage unit.

8. The radiographic imaging system according to claim 7, wherein the correction image data determination unit selects correction image data to be used for correction of the stitched image from the plurality of pieces of correction image data stored in the storage unit.

9. The radiographic imaging system according to claim 7, wherein the correction image data determination unit generates correction image data to be used for correction of the stitched image from the plurality of pieces of correction image data stored in the storage unit.

10. The radiographic imaging system according to claim 1, further comprising a transmission unit configured to transmit an irradiation condition corresponding to the correction image data to a radiation generation control unit controlling the radiation source.

11. The radiographic imaging system according to claim 10,

wherein the irradiation condition corresponding to the correction image data includes position information about positions of the plurality of radiographic imaging apparatuses and the radiation source at time of acquisition of the correction image data, and

wherein the radiation generation control unit includes a position display unit in which a display is changed based on a difference between the position information about the positions of the plurality of radiographic imaging apparatuses and the radiation source and position information transmitted from the transmission unit.

12. The radiographic imaging system according to claim 11, wherein the radiation generation control unit controls a position of the radiation source so that the difference is reduced.

13. The radiographic imaging system according to claim 11, wherein, in a case where the radiation source is arranged at a position at which a correction of the stitched image cannot be made based on the correction image data, the transmission unit transmits a signal for control of the radiation source to the radiation generation control unit so that radiation is not emitted.

14. The radiographic imaging system according to claim 1, wherein each of the radiographic imaging apparatuses includes a radiation detection panel configured to convert the emitted radiation into an image signal.

15. A control method for a radiographic imaging system including a plurality of radiographic imaging apparatuses each configured to acquire a radiographic image and a processing unit configured to combine a plurality of the radiographic images acquired from the plurality of radiographic imaging apparatuses to generate a stitched image, the control method comprising:

determining correction image data based on an irradiation condition of radiation emitted from a radiation source; and

correcting an area of the stitched image corresponding to an area in which the plurality of radiographic imaging apparatuses overlap, by using the correction image data.

16. A storage medium storing a program for causing a computer to perform the control method according to claim 15.