# US 11,308,622 B2 · Information processing apparatus and method for controlling the same to generate a difference image from first and second inspection images > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,308,622 B2 - Document ID: US11308622B2 - Status: Granted - Kind: B2 - Application number: 16/616,184 - Filed: 2018-05-21 - Published: 2020-05-21 - Granted: 2022-04-19 - Earliest claimed: 2017-05-31 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Kazuhiro Miyasa; Daisuke Kibe; Yukari Nakashoji; Kiyohide Satoh - Web page: https://patentgrep.com/patent/US11308622B2 ## CPC - G06T 7/0016: {involving temporal comparison} - G09G 5/377: for mixing or overlaying two or more graphic patterns (G09G5/02, G09G5/397 take precedence) - G16H 30/40: for processing medical images, e.g. editing - G06T 2207/10081: Computed x-ray tomography [CT] - G06T 2207/10088: Magnetic resonance imaging [MRI] - G06T 2207/10132: Ultrasound image - G06T 2207/20224: Image subtraction - G06T 2207/30061: Lung - G09G 2380/08: Biomedical applications - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA ## Abstract An information processing apparatus includes an image obtaining unit configured to obtain a first inspection image having first supplemental information and a second inspection image having second supplemental information, a difference image obtaining unit configured to obtain a difference image generated using the first and second inspection images, a difference information obtaining unit configured to obtain difference information on a difference between the first supplemental information and the second supplemental information, and an association unit configured to associate the difference information with the difference image. ## Claims ### Claim 1 An information processing apparatus comprising: an image obtaining unit configured to obtain a first inspection image having first supplemental information and a second inspection image having second supplemental information, wherein the first supplemental information is information relating to at least one of first imaging parameters and first reconstruction parameters related to the first inspection image and to be added when the first inspection image is captured or generated, and the second supplemental information is information relating to at least one of second imaging parameters and second reconstruction parameters related to the second inspection image and to be added when the second inspection image is captured or generated; a difference image obtaining unit configured to obtain a difference image generated using the first and second inspection images; a difference information obtaining unit configured to obtain difference information on a difference between the first supplemental information and the second supplemental information; and an association unit configured to associate the difference information with the difference image, wherein the association unit associates the difference information with the difference image by recording the difference information in third supplemental information included in the difference image, and wherein the third supplemental information includes a first tag defined in advance and a second tag uniquely defined, and the association unit records the difference information in the second tag included in the third supplemental information. ### Claim 2 (depends on 1) The information processing apparatus according to claim 1, further comprising a display control unit configured to display the difference information and the difference image which are associated with each other in a display unit. ### Claim 3 (depends on 2) The information processing apparatus according to claim 2, wherein the display control unit displays the associated difference information such that the difference information is superposed on the difference image. ### Claim 4 (depends on 2) The information processing apparatus according to claim 2, wherein each of the first supplemental information and the second supplemental information includes at least one item, and wherein the difference information is obtained by obtaining differences between items of the first supplemental information and corresponding items of the second supplemental information. ### Claim 5 (depends on 4) The information processing apparatus according to claim 4, wherein the display control unit further displays at least one of the items of the first supplemental information and of the second supplemental information, and wherein the display control unit displays the difference information corresponding to a displayed item and the difference image. ### Claim 6 (depends on 5) The information processing apparatus according to claim 5, wherein the display control unit displays a list of the difference information corresponding to the items which are not being displayed. ### Claim 7 (depends on 4) The information processing apparatus according to claim 4, wherein the first supplemental information includes at least an item indicating a first obtaining date when the first inspection image is obtained, wherein the second supplemental information includes at least an item indicating a second obtaining date when the second inspection image is obtained, and wherein the difference information includes at least a difference between the first and second obtaining dates. ### Claim 8 (depends on 4) The information processing apparatus according to claim 4, wherein the display control unit differentiates a display form of the item in which a difference is generated from a display form of an item in which a difference is not generated. ### Claim 9 (depends on 8) The information processing apparatus according to claim 8, wherein the display control unit does not display the difference information of the item in which a difference is not generated. ### Claim 10 (depends on 4) The information processing apparatus according to claim 4, wherein the display control unit differentiates display forms of the difference information of the items in accordance with degrees of influence of the differences of the items on the difference image. ### Claim 11 (depends on 1) The information processing apparatus according to claim 1, wherein the association unit generates the third supplemental information and records the difference information in the third supplemental information. ### Claim 12 (depends on 1) The information processing apparatus according to claim 1 wherein the imaging parameters are parameters that include information on at least one of an imaging state and a body position, and wherein the reconstruction parameters are parameters that include information on at least one of a reconfiguration function and a slice thickness. ### Claim 13 (depends on 1) The information processing apparatus according to claim 1 wherein the image obtaining unit further obtains imaging date and time and inspection date and time as supplemental information. ### Claim 14 A method for controlling an information processing apparatus, the method comprising: obtaining a first inspection image having first supplemental information and a second inspection image having second supplemental information, wherein the first supplemental information is information relating to at least one of first imaging parameters and first reconstruction parameters related to the first inspection image and to be added when the first inspection image is captured or generated, and the second supplemental information is information relating to at least one of second imaging parameters and second reconstruction parameters related to the second inspection image and to be added when the second inspection image is captured or generated; obtaining a difference image generated using the first and second inspection images; obtaining difference information on a difference between the first supplemental information and the second supplemental information; and associating the difference information with the difference image by recording the difference information in third supplemental information included in the difference image, wherein the third supplemental information includes a first tag defined in advance and a second tag uniquely defined, and the association unit records the difference information in the second tag included in the third supplemental information. ### Claim 15 An information processing apparatus comprising: an image obtaining unit configured to obtain a first inspection image having first supplemental information and a second inspection image having second supplemental information, wherein the first supplemental information is information relating to at least one of first imaging parameters and first reconstruction parameters related to the first inspection image and to be added when the first inspection image is captured or generated, and the second supplemental information is information relating to at least one of second imaging parameters and second reconstruction parameters related to the second inspection image and to be added when the second inspection image is captured or generated; a difference image obtaining unit configured to obtain a difference image generated using the first and second inspection images; a difference information obtaining unit configured to obtain difference information on a difference between the first supplemental information and the second supplemental information; a calculation unit configured to calculate a degree of reliability of the difference image based on the difference information; and a display control unit configured to display information on the degree of reliability and the difference image which are associated with each other in a display unit, wherein each of the first supplemental information and the second supplemental information includes at least one item, wherein the difference information is obtained by obtaining differences between items of the first supplemental information and corresponding items of the second supplemental information, and wherein the calculation unit calculates the degree of reliability of the difference image based on the number of items in which a difference is generated and which are included in the difference information and degrees of differences for individual items. ### Claim 16 (depends on 15) The information processing apparatus according to claim 15, wherein the calculation unit further calculates the degree of reliability of the difference image based on weights set for individual items. ### Claim 17 (depends on 15) The information processing apparatus according to claim 15, wherein the display control unit displays, in a display unit, information on the degree of reliability and the difference image which are associated with each other by superposing information on the degree of reliability on the difference image. ### Claim 18 A method for controlling an image processing apparatus, the method comprising: obtaining a first inspection image having first supplemental information and a second inspection image having second supplemental information, wherein the first supplemental information is information relating to at least one of first imaging parameters and first reconstruction parameters related to the first inspection image and to be added when the first inspection image is captured or generated, and the second supplemental information is information relating to at least one of second imaging parameters and second reconstruction parameters related to the second inspection image and to be added when the second inspection image is captured or generated; obtaining a difference image generated using the first and second inspection images; obtaining difference information on a difference between the first supplemental information and the second supplemental information; calculating a degree of reliability of the difference image based on the difference information; and displaying information on the degree of reliability and the difference image which are associated with each other in a display unit, wherein each of the first supplemental information and the second supplemental information includes at least one item, wherein the difference information is obtained by obtaining differences between items of the first supplemental information and corresponding items of the second supplemental information, and wherein the degree of reliability of the difference image is calculated based on the number of items in which a difference is generated and which are included in the difference information and degrees of differences for individual items.