# US 2017/0281118 A1 · X-ray diagnostic imaging apparatus, monitoring server and anomaly detection method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0281118 A1 - Document ID: US20170281118A1 - Status: Published application - Kind: A1 - Application number: 15/529,108 - Filed: 2015-12-24 - Published: 2017-10-05 - Earliest claimed: 2014-12-26 - Assignees: Hitachi, Ltd. - Applicants: Hitachi, Ltd. - Inventors: Takeshi HIRAYU - Web page: https://patentgrep.com/patent/US20170281118A1 ## CPC - A61B 6/586: {Detection of faults or malfunction of the device} - A61B 6/03: Computed tomography [CT] - A61B 6/032: {Transmission computed tomography [CT]} - A61B 6/0407: {Supports, e.g. tables or beds, for the body or parts of the body} - A61B 6/40: Arrangements for generating radiation specially adapted for radiation diagnosis - A61B 6/4435: {the source unit and the detector unit being coupled by a rigid structure} - A61B 6/461: {Displaying means of special interest} - A61B 6/5205: {involving processing of raw data to produce diagnostic data} - A61B 6/54: {Control of apparatus or devices for radiation diagnosis} - H01J 35/153: {Spot position control} - H05G 1/52: Target size or shape; Direction of electron beam, e.g. in tubes with one anode and more than one cathode - A61B 6/4021: {involving movement of the focal spot} - H01J 35/14: Arrangements for concentrating, focusing, or directing the cathode ray - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) - H05G: X-RAY TECHNIQUE (investigating or analysing materials by the use of X-rays G01N23/00; apparatus for X-ray photography G03B42/02; X-ray tubes H01J35/00; TV systems having X-ray input H04N5/321) ## Abstract In order to provide an X-ray diagnostic imaging apparatus which can detect anomalies caused by factors other than wearing of a bearing of an X-ray tube, according to the present invention, there is provided an X-ray diagnostic imaging apparatus including an X-ray tube that irradiates an object with X-rays, an X-ray detector that detects X-rays having been transmitted through the object, an image creation unit that creates a medical image of the object on the basis of the output of the X-ray detector, a change amount measurement unit that measures a change amount of an X-ray focal point which is an X-ray generation point of the X-ray tube, and an anomaly detection unit that detects an anomaly in the X-ray tube on the basis of whether or not the change amount falls within a predetermined normal change range. ## Claims ### Claim 1 An X-ray diagnostic imaging apparatus comprising: an X-ray tube that irradiates an object with X-rays; an X-ray detector that detects X-rays having been transmitted through the object; an image creation unit that creates a medical image of the object on the basis of the output of the X-ray detector; a change amount measurement unit that measures a change amount of an X-ray focal point which is an X-ray generation point of the X-ray tube; and an anomaly detection unit that detects an anomaly in the X-ray tube on the basis of whether or not the change amount falls within a predetermined normal change range, wherein the anomaly detection unit includes a comparison unit that compares the change amount with the normal change range correlated with scanning conditions when the change amount is measured, so as to determine the presence or absence of an anomaly in the X-ray tube. ### Claim 2 (depends on 1) The X-ray diagnostic imaging apparatus according to claim 1, further comprising: a display control unit that receives a determination result of whether the X-ray tube is normal or abnormal from the comparison unit, and displays the determination result on a display device. ### Claim 3 (depends on 1) The X-ray diagnostic imaging apparatus according to claim 1, wherein the anomaly detection unit further includes a change amount recording unit that records the change amount and scanning conditions when the change amount is measured in correlation with each other. ### Claim 4 (depends on 1) The X-ray diagnostic imaging apparatus according to claim 1, further comprising: a storage unit that stores the normal change range in correlation with scanning conditions. ### Claim 5 (depends on 1) The X-ray diagnostic imaging apparatus according to claim 1, wherein the anomaly detection unit further includes an abnormal location specifying unit that specifies an abnormal location on the basis of a period in which the change amount falls within an abnormal change range other than the normal change range when the comparison unit determines that there is an anomaly. ### Claim 6 (depends on 5) The X-ray diagnostic imaging apparatus according to claim 5, wherein the abnormal location specifying unit specifies a cathode of the X-ray tube as an abnormal location in a case where a period in which the change amount falls within the abnormal change range is more than a set threshold value. ### Claim 7 (depends on 5) The X-ray diagnostic imaging apparatus according to claim 5, wherein the abnormal location specifying unit specifies a rotation body support of the X-ray tube as an abnormal location in a case where the change amount vibrates between the normal change range and the abnormal change range. ### Claim 8 (depends on 1) The X-ray diagnostic imaging apparatus according to claim 1, further comprising: a service life estimation unit that estimates the service life of the X-ray tube on the basis of a vibration amount of the X-ray focal point. ### Claim 9 (depends on 3) The X-ray diagnostic imaging apparatus according to claim 3, further comprising: a rotation disk that is mounted with the X-ray tube and the X-ray detector, wherein the anomaly detection unit further includes a component separating unit that separates the change amount recorded in correlation with the scanning conditions by the change amount recording unit into a thermal expansion component related to thermal expansion and a centrifugal force component related to centrifugal force. ### Claim 10 (depends on 9) The X-ray diagnostic imaging apparatus according to claim 9, wherein the comparison unit acquires the thermal expansion component and the centrifugal force component of the change amount from the component separating unit, and compares each of the thermal expansion component and the centrifugal force component with the normal change range. ### Claim 11 (depends on 1) A monitoring server connected to the X-ray diagnostic imaging apparatus according to claim 1 via a network, wherein the monitoring server receives data regarding the change amount or data regarding an output from the anomaly detection unit from the X-ray diagnostic imaging apparatus, and collectively manages the data. ### Claim 12 (depends on 11) The monitoring server according to claim 11, wherein the service life of the X-ray tube is estimated on the basis of the data, and the replacement time of the X-ray tube is planned and displayed on the basis of the estimated service life. ### Claim 13 (depends on 11) The monitoring server according to claim 11, wherein an abnormal location in the X-ray tube is specified on the basis of the data, and a location to be inspected in the X-ray diagnostic imaging apparatus is presented on the basis of the history of the specified abnormal location. ### Claim 14 An anomaly detection method of detecting an anomaly in an X-ray diagnostic imaging apparatus including an X-ray tube that irradiates an object with X-rays, an X-ray detector that detects X-rays having been transmitted through the object, and an image creation unit that creates a medical image of the object on the basis of the output of the X-ray detector, the method comprising: a measurement step of measuring a change amount of an X-ray focal point which is an X-ray generation point of the X-ray tube; and an anomaly detection step of detecting an anomaly in the X-ray tube on the basis of whether or not the change amount falls within a predetermined normal change range, wherein the anomaly detection step includes a comparison step of comparing the change amount with the normal change range correlated with scanning conditions when the change amount is measured, so as to determine the presence or absence of an anomaly in the X-ray tube.