X-ray Collimator Auto-Alignment via 3D Camera Detection
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Solution Overview
Problem
X-ray imaging devices with mobile detectors face challenges in aligning the X-ray source and collimator to restrict the X-ray field to the active area of the detector, leading to increased X-ray doses due to manual and time-consuming adjustments.
Innovation Solution
A method and system for automatically detecting the position of the X-ray detector relative to the X-ray source and adjusting the collimator using a 3-D camera and processing device to align the collimated field with the active area of the detector, including automatic adjustments of the collimator's height, width, and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of the collimator is used to align the light field with the detector active area, then the X-ray field can be restricted to the active area, but the adjustment process is time-consuming and requires several iterations
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with an automated optical-mechanical system. A capturing device (camera) detects the detector position and the processing device automatically calculates and adjusts the collimator position, eliminating the need for operator manual adjustment while achieving precise alignment in a single automated operation.
Solution Approach 2:
The system performs self-adjustment by automatically detecting the detector arrangement, calculating the required collimator adjustment, and executing the adjustment without human intervention. The processing device uses the captured detector position information to autonomously control the collimator positioning mechanism.
2Adaptability or versatility
If the X-ray source and detector are freely arranged for mobile detector applications, then flexibility in examination positioning is improved, but the light field may extend beyond the active area causing increased X-ray dose
Solution Approach 1:
The patent implements a feedback control system where the capturing device continuously monitors the detector position and the processing device uses this information to adjust the collimator settings. This closed-loop feedback ensures that regardless of how freely the detector is positioned, the collimator automatically adapts to restrict the light field precisely to the active area, preventing excessive X-ray exposure.
Solution Approach 2:
The system dynamically adjusts the collimator parameters based on the real-time detected detector position. As the detector can be freely moved to different locations and orientations, the collimator automatically changes its configuration to maintain optimal alignment, enabling flexible positioning without compromising radiation safety.
Data Source
AI summary
A method is disclosed for adjusting a collimator of an X-ray source. In an embodiment, the method includes detecting an arrangement of an X-ray detector with respect to the X-ray source; automatically determining an adjustment for the collimator based on the detected position of the X-ray detector with respect to the X-ray source; and automatically adjusting the collimator based on the determined adjustment for the collimator. An X-ray device and computer readable medium are also disclosed.