Video X-Ray Imaging Alignment for Consistent ICU Physiology Analysis
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Solution Overview
Problem
Radiographic imaging in ICU environments faces challenges due to inconsistent x-ray acquisition geometry, technique settings, respiratory phase disparities, and grayscale variability, which complicate the accurate assessment of patient condition and support device positioning.
Innovation Solution
A method for radiographic imaging that captures and stores image acquisition factors for subsequent images, using a control processor to ensure consistent imaging setup and timing, including respiratory cycle tracking, and applies post-processing techniques like digital subtraction and grayscale normalization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If video x-ray imaging is used to monitor breathing mechanics, then respiratory physiology can be assessed non-invasively, but the system complexity and cost increase significantly
Solution Approach 1:
The patent creates a simplified 2D representation (copy) of the complex 3D respiratory mechanics by tracking marker positions on the chest wall during video x-ray imaging. This allows extraction of breathing parameters without requiring full 3D reconstruction or complex imaging processing, thus maintaining non-invasive assessment while reducing system complexity
Solution Approach 2:
The patent introduces markers as intermediary objects attached to the chest wall that serve as reference points for tracking respiratory motion. These markers act as mediators between the complex x-ray imaging system and the simple breathing parameter measurements, enabling easy extraction of tidal volume, respiratory rate, and other parameters without direct complex measurement of internal respiratory mechanics
2Device complexity
If traditional spirometry is used for breathing assessment, then the equipment is simple and inexpensive, but it provides limited information about respiratory mechanics
Solution Approach 1:
The patent makes the video x-ray imaging system multi-functional by enabling it to perform both its primary diagnostic imaging function and secondary respiratory mechanics assessment function. By overlaying marker tracking on existing video x-ray footage, the system extracts multiple breathing parameters (tidal volume, respiratory rate, inspiratory/expiratory times) from the same imaging data, providing comprehensive respiratory evaluation without requiring separate specialized equipment
3Measurement precision
If invasive methods are used for precise breathing measurement, then measurement precision is high, but patient comfort and safety deteriorate
Solution Approach 1:
The patent measures breathing mechanics indirectly by tracking the motion copy (marker positions) on the external chest wall surface rather than directly measuring internal respiratory parameters. This indirect measurement approach achieves sufficient precision for clinical assessment while completely avoiding invasive procedures, thus maintaining measurement accuracy while eliminating patient discomfort and safety risks
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves image consistency and suitability for machine learning analysis, enabling more accurate patient condition assessment and support device evaluation by aligning geometric and temporal features across multiple imaging sessions.
Implementation Method 1
A video x-ray system includes an x-ray source configured to emit a sequence of x-ray pulses through a subject
Implementation Method 2
an image detector configured to detect the x-ray pulses and emit video signals
Data Source
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AI summary
A method for radiographic imaging of a patient directs imaging radiation to an anatomy of the patient using a radiographic imaging apparatus. A first image of the patient anatomy is captured in a digital detector, and one or more image acquisition factors are electronically stored. A second radiographic image of the same patient anatomy is captured by accessing and using the stored one or more image acquisition factors. A combination of the first and second radiographic images is displayed or transmitted.