3D Posture-Based Radiation Source Positioning for Radiography
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Solution Overview
Problem
Existing radiography technologies face challenges in capturing appropriate radiation images when subjects fail to assume predetermined postures due to body shape, physical ability, or injury, leading to difficulties in observing the imaging part effectively.
Innovation Solution
An information processing apparatus and method that acquires a three-dimensional shape of the subject, derives movement amounts for a radiation source based on the difference between a predetermined reference posture and an estimated posture, and controls the radiation source to adjust its position and orientation for optimal imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the subject takes a predetermined posture for radiography, then the imaging part can be observed in an appropriate state, but it becomes difficult to capture appropriate radiation images when the subject cannot maintain the predetermined posture due to body shape, physical ability, or injury
Solution Approach 1:
The radiation source position and angle are made dynamically adjustable based on the subject's actual posture. The system calculates the deviation from the reference posture and automatically adjusts the radiation source's position and irradiation angle to compensate for the posture deviation, enabling appropriate imaging even when the subject cannot maintain the predetermined posture
Solution Approach 2:
The system changes the parameters of the radiation source (position coordinates and irradiation angle) based on the measured posture deviation. By calculating the required movement amount and angle adjustment based on the difference between reference posture and actual posture, the system adapts the imaging parameters to match the subject's actual state
2Measurement precision
If manual positioning is performed by adjusting the subject posture and radiation source position, then appropriate imaging can be achieved, but the operation becomes complex and time-consuming
Solution Approach 1:
The system performs automatic positioning by measuring the subject's actual posture using three-dimensional shape data, calculating the required radiation source adjustment, and executing the position and angle changes automatically. This eliminates the need for manual positioning operations by doctors or technicians, reducing operational complexity and time
Solution Approach 2:
The system measures the subject's actual posture and uses this feedback information to calculate and execute the necessary radiation source adjustments. The closed-loop feedback mechanism automatically compensates for posture deviations, replacing complex manual positioning operations with automated control
Data Source
AI summary
An information processing apparatus comprising at least one processor, wherein the processor is configured to: acquire a three-dimensional shape of a subject; derive a movement amount of a radiation source that irradiates the subject with radiation based on a difference between a predetermined reference posture and an estimated posture estimated based on the three-dimensional shape for a posture of the subject in a case of capturing a radiation image of the subject; and control the radiation source to move according to the movement amount.