# US 2017/0281114 A1 · System and method for adjusting a radiation dose during imaging of an object within a subject > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0281114 A1 - Document ID: US20170281114A1 - Status: Published application - Kind: A1 - Application number: 15/087,304 - Filed: 2016-03-31 - Published: 2017-10-05 - Earliest claimed: 2016-03-31 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: CYRIL RIDDELL; RÉGIS VAILLANT; KETAN SHRINKANT BACCHUWAR - Web page: https://patentgrep.com/patent/US20170281114A1 ## CPC - A61B 6/542: {involving control of exposure} - A61B 6/06: Diaphragms - A61B 6/12: Arrangements for detecting or locating foreign bodies - A61B 6/405: {Source units specially adapted to modify characteristics of the beam during the data acquisition process (A61B6/4021, A61B6/4035 take precedence)} - A61B 6/481: {involving the use of contrast agents} - A61B 6/487: {involving fluoroscopy} - A61B 6/504: {for diagnosis of blood vessels, e.g. by angiography} - A61B 6/5211: {involving processing of medical diagnostic data} - G06T 7/0012: {Biomedical image inspection} - G16H 50/20: for computer-aided diagnosis, e.g. based on medical expert systems - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA ## Abstract A method for adjusting a radiation dose during imaging of an object within a subject is provided. The method includes identifying a task in a first frame that contains the object, the first frame generated via exposing the subject to a radiation beam; and adjusting the radiation beam based at least in part on the task prior to generating a second frame that contains the object, the second frame generated via exposing the subject to the radiation beam. ## Claims ### Claim 1 A method for adjusting a radiation dose during imaging of an object within a subject, the method comprising: identifying a task in a first frame that contains the object, the first frame generated via exposing the subject to a radiation beam; and adjusting the radiation beam based at least in part on the task prior to generating a second frame that contains the object, the second frame generated via exposing the subject to the radiation beam. ### Claim 2 (depends on 1) The method of claim 1, wherein adjusting the radiation beam based at least in part on the task prior to generating a second frame that contains the object, the second frame generated via exposing the subject to the radiation beam, comprises: adjusting at least one of an image quality of the second frame, a frame rate between the first frame and the second frame, a field of view of the second frame, and a collimation of the adjusted radiation beam. ### Claim 3 (depends on 1) The method of claim 1, wherein adjusting the radiation beam based at least in part on the task prior to generating a second frame that contains the object, the second frame generated via exposing the subject to the radiation beam, comprises: determining a difficulty level of the task. ### Claim 4 (depends on 3) The method of claim 3, wherein determining a difficulty level of the task comprises: performing a semantic analysis of the first frame. ### Claim 5 (depends on 4) The method of claim 4, wherein performing a semantic analysis of the first frame comprises: identifying in the first frame at least one of a number of tools, a status of a catheter, and a step of the task. ### Claim 6 (depends on 1) The method of claim 1, wherein adjusting the radiation beam based at least in part on the task prior to generating a second frame that contains the object, the second frame generated via exposing the subject to the radiation beam, comprises: adjusting the radiation beam such that the adjusted radiation beam conforms to a radiation exposure strategy. ### Claim 7 (depends on 6) The method of claim 6, wherein adjusting the radiation beam based at least in part on the task prior to generating a second frame that contains the object, the second frame generated via exposing the subject to the radiation beam, further comprises: overriding the radiation exposure strategy such that the adjusted radiation beam does not conform to the radiation exposure strategy. ### Claim 8 (depends on 1) The method of claim 1, wherein identifying a task in a first frame that contains the object, the first frame generated via exposing the subject to the radiation beam, comprises: determining in the first frame whether the imaged object is at least one of high contrast and low contrast. ### Claim 9 (depends on 1) The method of claim 1, wherein adjusting the radiation beam based at least in part on the task prior to generating a second frame that contains the object, the second frame generated via exposing the subject to the radiation beam, comprises: identifying a structure in the first frame; and subtracting the identified structure from the first frame. ### Claim 10 (depends on 9) The method of claim 9, wherein the subject is a patient, the imaged object is a blood vessel of the patient that is infused with a high contrast medium, and the identified structure includes at least one of an organ of the patient other than the blood vessel, and a medical device. ### Claim 11 (depends on 1) The method of claim 1, wherein the first frame and the second frame are based at least in part on a mask, and adjusting the radiation beam based at least in part on the task prior to generating a second frame that contains the object, the second frame generated via exposing the subject to the radiation beam, comprises: generating an intermediate frame via exposing the subject to the radiation beam before generating the second frame, the intermediate frame containing the object and based at least in part on the mask; comparing the first frame with the intermediate frame to obtain a contrast indicator; and adjusting the mask based at least in part on the contrast indicator. ### Claim 12 A method for adjusting a radiation dose during imaging of an object within a subject, the method comprising: generating a first frame that contains the object via applying a mask to a first image obtained via exposing the subject to a radiation beam; identifying a task in the first frame; generating a second frame that contains the object via applying the mask to a second image obtained via exposing the subject to the radiation beam; comparing the first frame with the second frame to obtain a contrast indicator; adjusting the mask based at least in part on the contrast indicator; and adjusting the radiation beam based at least in part on at least one of the task and the adjusted mask. ### Claim 13 (depends on 12) The method of claim 12, wherein comparing the first frame with the second frame to obtain a contrast indicator comprises: detecting an area common between the first frame and the second frame that does not exhibit significant contrast. ### Claim 14 (depends on 12) The method of claim 12, wherein adjusting the mask based at least in part on the contrast indicator comprises: reducing the mask. ### Claim 15 (depends on 12) The method of claim 12, wherein adjusting the radiation beam based at least in part on at least one of the task and the adjusted mask comprises: identifying a structure in the first frame; and subtracting the identified structure from the first frame. ### Claim 16 An imaging system that adjusts a radiation dose during imaging of an object within a subject, the imaging system comprising: a controller configured to generate a first frame that contains the object via exposing the subject to a radiation beam; and wherein the controller is further configured to identify a task in the first frame and adjust the radiation beam based at least in part on the identified task prior to generating a second frame that contains the object via exposing the subject to the radiation beam. ### Claim 17 (depends on 16) The system of claim 16, wherein the subject is a patient, the imaged object is a blood vessel of the patient that is infused with a high contrast medium, and the controller is further configured to determine a difficulty level of the identified task. ### Claim 18 (depends on 17) The system of claim 17, wherein the controller is further configured to determine the difficulty level of the identified task via performing a semantic analysis of the first frame. ### Claim 19 (depends on 16) The system of claim 16, wherein the controller is further configured to adjust the radiation beam via identifying a structure in the first frame and subtracting the identified structure from the first frame. ### Claim 20 (depends on 16) The system of claim 16, wherein the first frame and the second frame are based at least in part on a mask, and the controller is further configured to generate an intermediate frame after generating the first frame and before generating the second frame, the intermediate frame containing the object via exposing the subject to the radiation beam and also based at least in part on the mask; compare the first frame with the intermediate frame to obtain a contrast indicator; adjust the mask based at least in part on the contrast indicator; and adjust the radiation beam based at least in part on the adjusted mask prior to generating the second frame. ### Claim 21 A method for adjusting a radiation dose during imaging of an object within a subject, the method comprising: acquiring a first series of images in rotation around the subject prior to injection of a contrast agent; acquiring a second series of images in rotation around the subject after injection of the contract agent; and wherein a pattern is identified in a first image of the second series of images, and subsequent images of the second series of images acquired after the first image are optimized based at least in part on the identified pattern.