X-ray Imaging System Positioning via 3D Spine Segmentation
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Solution Overview
Problem
During spine interventions, achieving precise alignment of the X-ray imaging system is challenging, requiring manual adjustments and multiple X-ray images, which increases patient and operator dose and is cumbersome due to varying positions for each vertebra level.
Innovation Solution
A device comprising a data storage unit, processing unit, and output unit that uses 3D image data of the spine to select and segment vertebrae, define a reference line based on anatomical features, and determine an optimal viewing direction for the X-ray imaging system, reducing the need for manual adjustments and minimizing X-ray exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of the X-ray imaging system is used to achieve precise alignment, then the desired viewing direction can be obtained, but the patient and operator dose increases due to multiple X-ray images required
Solution Approach 1:
The system performs preliminary action by calculating the optimal viewing direction in advance using 3D spine image data and anatomical feature analysis. The processing unit determines the precise orientation needed to visualize the target vertebra without overlap before any X-ray imaging occurs, allowing the X-ray system to be positioned correctly on the first attempt rather than requiring multiple trial images
Solution Approach 2:
The system uses a digital copy (3D image data) of the patient's spine anatomy to simulate and determine the optimal viewing direction virtually. By working with the digital model and its segmented anatomical features rather than physical trial-and-error positioning, the system identifies the correct orientation without exposing the patient to unnecessary radiation
2Measurement precision
If manual adjustment of the X-ray imaging system is used to achieve precise alignment, then the desired viewing direction can be obtained, but the workflow becomes cumbersome due to repeated adjustments for each vertebra level
Solution Approach 1:
The system performs self-service by automatically calculating and providing the optimal viewing direction without requiring manual trial-and-error adjustments. The processing unit autonomously analyzes the 3D spine data, segments the vertebrae, identifies anatomical features, and determines the precise orientation needed, eliminating the need for operators to repeatedly adjust the X-ray system for each vertebra level
Solution Approach 2:
The system performs preliminary action by pre-calculating the optimal viewing direction for each target vertebra before the actual X-ray imaging process. This advance calculation based on 3D anatomical data allows the operator to directly position the X-ray system according to the provided orientation without time-consuming manual adjustments during the procedure
3Measurement precision
If multiple X-ray images are taken to achieve precise alignment, then the desired viewing direction can be obtained, but the complexity of the positioning process increases
Solution Approach 1:
The system replaces the mechanical trial-and-error positioning process with a computational approach. Instead of physically adjusting the X-ray system based on visual feedback from multiple X-ray images, the system uses the processing unit to calculate the optimal viewing direction from 3D spine image data, substituting mechanical adjustment with algorithmic determination
Data Source
AI summary
A device for positioning of an X-ray imaging system. The device comprises a processor configured to obtain 3D image data of a spine region of interest of a subject comprising a spine structure. The processor is further configured to select at least one vertebra of the spine structure as target vertebra; segment the target vertebra in the 3D image data including identifying at least one anatomic feature of the target vertebra; define a position of a predetermined reference line based on a spatial arrangement of the at least one anatomic feature; determine a target viewing direction of the X-ray imaging system based on the predetermined reference line; and provide the target viewing direction for the X-ray imaging system.