# US 2013/0156154 A1 · X-ray diagnosis apparatus and control method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0156154 A1 - Document ID: US20130156154A1 - Status: Published application - Kind: A1 - Application number: 13/709,327 - Filed: 2012-12-10 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Assignees: Toshiba Medical Systems Corporation - Inventors: Koichiro Watanabe; Hisato Takemoto; Takayuki Ishikawa; Takuya Sakaguchi - Web page: https://patentgrep.com/patent/US20130156154A1 ## CPC - A61B 6/022: {Stereoscopic imaging} - A61B 6/06: Diaphragms - A61B 6/487: {involving fluoroscopy} - A61B 6/5229: {combining image data of a patient, e.g. combining a functional image with an anatomical image} - A61B 6/4233: {using matrix detectors} - A61B 6/4291: {the detector being combined with a grid or grating} - A61B 6/4441: {the rigid structure being a C-arm or U-arm} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An X-ray diagnosis apparatus includes a radiography image generating unit, a fluoroscopy image generating unit, a display control unit and an irradiation field changing unit. The radiography image generating unit controls an X-ray irradiation device, an X-ray detection device, a retainer, and a bed system, and generates a radiography image by using a radiography irradiation field. The fluoroscopy image generating unit controls the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and generates a fluoroscopy image by using a fluoroscopy irradiation field, the fluoroscopy irradiation field being narrower than the radiography irradiation field. The display control unit generates a superimposed image in which the fluoroscopy image is superimposed on a part of the radiography image, and displays the superimposed image on a display device. The irradiation field changing unit changes the fluoroscopy irradiation field with the superimposed image being displayed. ## Claims ### Claim 1 An X-ray diagnosis apparatus comprising: an X-ray irradiation device configured to irradiate an object with an X-ray, the device including an X-ray source configured to generate an X-ray and a movable aperture device configured to form an X-ray irradiation field; an X-ray detection device disposed to be opposed to the X-ray irradiation device and configured to detect the X-ray; a retainer configured to retain the X-ray irradiation device and the X-ray detection device; a bed system provided between the X-ray irradiation device and the X-ray detection device, and configured to place an object thereon; a radiography image generating unit configured to control the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and to generate a radiography image as a static image by using a radiography irradiation field as the X-ray irradiation field; a fluoroscopy image generating unit configured to control the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and to generate a fluoroscopy image as a dynamic image by using a fluoroscopy irradiation field as the X-ray irradiation field, the fluoroscopy irradiation field being narrower than the radiography irradiation field; a display control unit configured to generate a superimposed image in which the fluoroscopy image is superimposed on a part of the radiography image, and to display the superimposed image on a display device; and an irradiation field changing unit configured to change the fluoroscopy irradiation field with the superimposed image being displayed. ### Claim 2 (depends on 1) The X-ray diagnosis apparatus according to claim 1, wherein when relative positions of the object and the X-ray detection device are changed with the superimposed image being displayed, the irradiation field changing unit controls the movable aperture device so as to change the X-ray irradiation field within the radiography irradiation field without changing the fluoroscopy position of the object. ### Claim 3 (depends on 2) The X-ray diagnosis apparatus according to claim 2, wherein the irradiation field changing unit slides the fluoroscopy irradiation field in accordance with at least one of amounts of slides of the X-ray detection device and the retainer. ### Claim 4 (depends on 2) The X-ray diagnosis apparatus according to claim 2, wherein the irradiation field changing unit controls the movable aperture device so as to slide the fluoroscopy irradiation field in accordance with an amount of rotational motion and an amount of arc motion of the retainer. ### Claim 5 (depends on 1) The X-ray diagnosis apparatus according to claim 1, wherein the irradiation field changing unit controls, while the superimposed image is displayed, the movable aperture device so as to slide the fluoroscopy irradiation field within the radiography irradiation field in accordance with an amount of movement of a catheter tip end detected on the fluoroscopy image in such a manner that the catheter tip end is always recognized on the fluoroscopy image. ### Claim 6 (depends on 1) The X-ray diagnosis apparatus according to claim 1, further comprising: an input device configured to instruct the irradiation field changing unit to change the fluoroscopy irradiation field while the superimposed image is displayed. ### Claim 7 (depends on 1) The X-ray diagnosis apparatus according to claim 1, wherein the radiography image generating unit updates the radiography image superimposed on the superimposed image by temporarily interrupting generation of the fluoroscopy image after initiation of the generation of the fluoroscopy image, and generating the radiography image during the interruption. ### Claim 8 (depends on 7) The X-ray diagnosis apparatus according to claim 7, wherein the radiography image generating unit intermittently interrupts the generation of the fluoroscopy image at a predetermined time interval, and generates the radiography image during the interruption. ### Claim 9 (depends on 7) The X-ray diagnosis apparatus according to claim 7, wherein the radiography image generating unit interrupts the generation of the fluoroscopy image after relative positions of the object and the X-ray detection device are changed, and generates the radiography image during the interruption. ### Claim 10 An X-ray diagnosis apparatus comprising: an X-ray irradiation device configured to irradiate an object with an X-ray, the device including an X-ray source configured to generate an X-ray and a movable aperture device configured to form an X-ray irradiation field; an X-ray detection device disposed to be opposed to the X-ray irradiation device and configured to detect the X-ray; a retainer configured to retain the X-ray irradiation device and the X-ray detection device; a bed system provided between the X-ray irradiation device and the X-ray detection device, and configured to place an object thereon; a radiography image generation unit configured to control the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and to generate a radiography image as a static image by using a radiography irradiation field as the X-ray irradiation field; a fluoroscopy image generation unit configured to control the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and to generate a fluoroscopy image as a dynamic image by using a fluoroscopy irradiation field as the X-ray irradiation field, the fluoroscopy irradiation field being narrower than the radiography irradiation field; a display control unit configured to generate a superimposed image in which the fluoroscopy image is superimposed on a part of the radiography image, and to display the superimposed image on a display device; and an irradiation field changing unit configured to enlarge/contract the fluoroscopy irradiation field with a fluoroscopy irradiation field center as a center, while the superimposed image is displayed. ### Claim 11 (depends on 10) The X-ray diagnosis apparatus according to claim 10, wherein the irradiation field changing unit controls the movable aperture device so as to zoom-in and zoom-out the fluoroscopy image with the fluoroscopy irradiation field center as a center, while the superimposed image is displayed. ### Claim 12 A control method for an X-ray diagnosis apparatus including: an X-ray irradiation device configured to irradiate an object with an X-ray, the device including an X-ray source configured to generate an X-ray and a movable aperture device configured to form an X-ray irradiation field; an X-ray detection device disposed to be opposed to the X-ray irradiation device and configured to detect the X-ray; a retainer configured to retain the X-ray irradiation device and the X-ray detection device; and a bed system provided between the X-ray irradiation device and the X-ray detection device, and configured to place an object thereon, comprising: controlling the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and to generate a radiography image as a static image by using a radiography irradiation field as the X-ray irradiation field; controlling the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and generating a fluoroscopy image as a dynamic image by using a fluoroscopy irradiation field as the X-ray irradiation field, the fluoroscopy irradiation field being narrower than the radiography irradiation field; generating a superimposed image in which the fluoroscopy image is superimposed on a part of the radiography image, and displaying the superimposed image on a display device; and changing the fluoroscopy irradiation field with the superimposed image being displayed. ### Claim 13 (depends on 12) The control method according to claim 12, wherein when relative positions of the object and the X-ray detection device are changed with the superimposed image being displayed, the fluoroscopy irradiation field changing controls the movable aperture device so as to change the X-ray irradiation field within the radiography irradiation field without changing the fluoroscopy position of the object. ### Claim 14 (depends on 13) The control method according to claim 13, wherein the fluoroscopy irradiation field changing slides the fluoroscopy irradiation field in accordance with at least one of amounts of slides of the X-ray detection device and the retainer. ### Claim 15 (depends on 13) The control method according to claim 13, wherein the fluoroscopy irradiation field changing controls the movable aperture device so as to slide the fluoroscopy irradiation field in accordance with an amount of rotational motion and an amount of arc motion of the retainer. ### Claim 16 (depends on 12) The control method according to claim 12, wherein the fluoroscopy irradiation field changing controls, while the superimposed image is displayed, the movable aperture device so as to slide the fluoroscopy irradiation field within the radiography irradiation field in accordance with an amount of movement of a catheter tip end detected on the fluoroscopy image in such a manner that the catheter tip end is always recognized on the fluoroscopy image. ### Claim 17 (depends on 12) The control method according to claim 12, wherein the radiography image generating updates the radiography image superimposed on the superimposed image by temporarily interrupting generation of the fluoroscopy image after initiation of the generation of the fluoroscopy image, and generating the radiography image during the interruption. ### Claim 18 (depends on 17) The control method according to claim 17, wherein the radiography image generating intermittently interrupts the generation of the fluoroscopy image at a predetermined time interval, and generates the radiography image during the interruption. ### Claim 19 (depends on 17) The control method according to claim 17, wherein the radiography image generating interrupts the generation of the fluoroscopy image after relative positions of the object and the X-ray detection device are changed, and generates the radiography image during the interruption.