# US 2025/0155591 A1 · Radiation imaging apparatus, method for evaluating radiation imaging apparatus, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0155591 A1 - Document ID: US20250155591A1 - Status: Published application - Kind: A1 - Application number: 18/942,263 - Filed: 2024-11-08 - Published: 2025-05-15 - Earliest claimed: 2023-11-14 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Masao INA; Masato OFUJI; Kazuaki UMEKAWA - Web page: https://patentgrep.com/patent/US20250155591A1 ## CPC - G01T 7/00: Details of radiation-measuring instruments - G01T: MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N23/00; tubes for determining the presence, intensity, density or energy of radiation or particles H01J47/00) ## Abstract A radiation imaging apparatus includes an acquisition unit configured to acquire an image from an imaging unit having a plurality of pixels for detecting a radiation, an estimation unit configured to estimate a degradation degree of the radiation imaging apparatus based on the image acquired by the acquisition unit, and a prediction unit configured to predict a life of the radiation imaging apparatus based on a prediction of a transition of the degradation degree of the radiation imaging apparatus acquired by the estimation unit. ## Claims ### Claim 1 A radiation imaging apparatus comprising: an acquisition unit configured to acquire an image from an imaging unit having a plurality of pixels for detecting a radiation; an estimation unit configured to estimate a degradation degree of the radiation imaging apparatus based on the image acquired by the acquisition unit; and a prediction unit configured to predict a life of the radiation imaging apparatus based on a prediction of a transition of the degradation degree of the radiation imaging apparatus acquired by the estimation unit. ### Claim 2 (depends on 1) The radiation imaging apparatus according to claim 1, wherein the prediction unit comprises: a calculation unit configured to predict a transition of the degradation degree based on the degradation degree of the radiation imaging apparatus acquired by the estimation unit; and a determination unit configured to determine the life of the radiation imaging apparatus based on a result of the prediction of the degradation degree by the calculating unit and a determination threshold value. ### Claim 3 (depends on 1) The radiation imaging apparatus according to claim 1, wherein the estimation unit estimates a variation of a threshold voltage of a switching element included in the pixel based on the acquired image, and wherein the prediction unit predicts a transition of the variation of the threshold voltage of the switching element. ### Claim 4 (depends on 1) The radiation imaging apparatus according to claim 1, wherein the estimation unit estimates the number of defective pixels of the imaging unit based on the acquired image, and wherein the prediction unit predicts a transition of the number of defective pixels. ### Claim 5 (depends on 1) The radiation imaging apparatus according to claim 1, wherein the estimation unit estimates an image average output of the imaging unit based on the acquired image, and wherein the prediction unit predicts a transition of the image average output. ### Claim 6 (depends on 1) The radiation imaging apparatus according to claim 1, further comprising a time measurement unit configured to measure irradiation time of a radiation, wherein the prediction unit predicts of a transition of the degradation degree of the radiation imaging apparatus over the irradiation time. ### Claim 7 (depends on 1) The radiation imaging apparatus according to claim 1, further comprising a dose measurement unit configured to measure a cumulative dose of a radiated radiation, wherein the prediction unit predicts a transition of the degradation degree of the radiation imaging apparatus with respect to the cumulative radiation dose. ### Claim 8 (depends on 1) The radiation imaging apparatus according to claim 1, wherein the prediction unit predicts the degradation degree of the radiation imaging apparatus by using an approximation curve. ### Claim 9 (depends on 1) The radiation imaging apparatus according to claim 1, wherein the prediction unit predicts a transition of the degradation degree of the radiation imaging apparatus based on results of a predetermined number of previously acquired degradation degrees of the radiation imaging apparatus acquired by the estimation unit. ### Claim 10 (depends on 1) The radiation imaging apparatus according to claim 1, wherein the estimation unit estimates the degradation degree of the radiation imaging apparatus based on a representative value for each region of the acquired image. ### Claim 11 (depends on 1) The radiation imaging apparatus according to claim 1, wherein the estimation unit estimates the degradation degree of the radiation imaging apparatus by using a part of the acquired image. ### Claim 12 A method for evaluating a radiation imaging apparatus, the method comprising: acquiring an image from an imaging unit having a plurality of pixels for detecting a radiation; estimating a degradation degree of the radiation imaging apparatus based on the image acquired in the acquisition; and predicting a life of the radiation imaging apparatus based on a prediction of a transition of the degradation degree of the radiation imaging apparatus acquired in the estimation. ### Claim 13 A non-transitory computer readable storage medium that stores a program for causing a computer of a radiation imaging apparatus to execute a method comprising: acquiring an image from an imaging unit having a plurality of pixels for detecting a radiation; estimating a degradation degree of the radiation imaging apparatus based on the image acquired in the acquisition; and predicting a life of the radiation imaging apparatus based on a prediction of a transition of the degradation degree of the radiation imaging apparatus acquired in the estimation.