Portable image acquisition geometry self-adaptive correction method

By setting up an inertial measurement unit and curvature sensor on a portable DR device, and combining it with a multi-degree-of-freedom robotic arm for real-time attitude and deformation compensation, the imaging quality problem of portable DR devices in non-standard environments is solved, and automated geometric correction and high-quality image output are achieved.

CN122272051APending Publication Date: 2026-06-26中国人民解放军总医院第八医学中心
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中国人民解放军总医院第八医学中心
Filing Date
2026-03-26
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing portable DR equipment struggles to achieve automated geometric correction in non-standard environments, resulting in image quality that relies heavily on technician experience, severe image distortion, and low diagnostic accuracy.

Method used

An inertial measurement unit and a curvature sensor are set up on the X-ray tube and the flexible imaging plate. Combined with a multi-degree-of-freedom robotic arm, the relative attitude and deformation of the X-ray tube and the imaging plate are detected and compensated in real time. Image correction is performed through a three-dimensional curved surface model and a dynamic exposure field model.

Benefits of technology

It enables automatic correction of imaging status in non-standard environments, eliminates geometric distortion, improves the success rate of first-shot shooting and the accuracy of image diagnosis, and reduces reliance on technician experience.

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Abstract

This invention discloses a portable image acquisition geometric adaptive correction method, belonging to the field of medical imaging technology. The method involves installing a first IMU at the X-ray tube end and a second IMU and an array of curvature sensors at the flexible imaging plate end to acquire relative attitude and flexible imaging plate deformation data in real time. When an angular deviation is detected between the X-ray tube axis and the equivalent principal normal of the imaging plate, a multi-degree-of-freedom robotic arm is driven to perform motion compensation. Simultaneously, a three-dimensional curved surface model of the flexible imaging plate is constructed based on the deformation data, and the original X-ray image is mapped back from the curved surface coordinate system to the standard planar coordinate system, outputting the corrected image. This invention achieves adaptive correction in non-standard environments, significantly reducing reliance on technician experience.
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