X-ray Diagnostic Apparatus Three-Dimensional Roadmap Reconstruction
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Solution Overview
Problem
Conventional X-ray diagnostic apparatuses face challenges in generating three-dimensional roadmap images efficiently, which are time-consuming to acquire and often not used due to increased radiation dose and prolonged procedure times, limiting their application in guiding catheter insertion during interventions.
Innovation Solution
The X-ray diagnostic apparatus employs a bi-plane acquisition mechanism and advanced image processing to reconstruct three-dimensional image data by obtaining transition information of contrast media in multiple directions, approximating voxel values to generate detailed blood vessel images, allowing for faster data acquisition and reduced radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional roadmap image acquisition is performed using conventional methods, then detailed blood vessel visualization is achieved, but procedure time is significantly prolonged
Solution Approach 1:
The system performs preliminary actions by acquiring mask images and contrast images in advance, then automatically generating three-dimensional roadmap images before catheter insertion. This allows the detailed blood vessel visualization to be prepared beforehand, eliminating the need for time-consuming real-time three-dimensional imaging during the procedure.
Solution Approach 2:
The system creates a three-dimensional roadmap image that serves as a copy or representation of the actual blood vessel structure. This roadmap image is then superimposed on real-time fluoroscopic images, providing detailed visualization without requiring continuous three-dimensional image acquisition during the procedure.
2Measurement precision
If three-dimensional roadmap image is used for blood vessel visualization, then catheter insertion accuracy is improved, but radiation dose increases
Solution Approach 1:
The system performs preliminary three-dimensional image acquisition and roadmap generation before the main procedure. By preparing the three-dimensional roadmap in advance with controlled radiation exposure, the system enables accurate catheter insertion without requiring prolonged real-time three-dimensional imaging, thus limiting total radiation dose.
Solution Approach 2:
The three-dimensional roadmap image serves as a reusable copy that can be displayed multiple times during the procedure without additional radiation exposure. This allows continuous reference to detailed blood vessel structures while maintaining low radiation doses during the actual catheter manipulation.
3Productivity
If two-dimensional roadmap function is used, then procedure time is reduced, but three-dimensional blood vessel structure understanding is limited
Solution Approach 1:
The system transitions from two-dimensional roadmap display to three-dimensional roadmap visualization by acquiring images in multiple directions and reconstructing volumetric data. This provides comprehensive three-dimensional structural information while maintaining procedural efficiency through automated processing and superimposition on real-time fluoroscopy.
Solution Approach 2:
The system creates a three-dimensional roadmap image that copies the actual blood vessel structure in three dimensions, then superimposes it on real-time fluoroscopic images. This provides complete three-dimensional information without requiring separate three-dimensional imaging during the procedure, thus maintaining procedural efficiency.
Data Source
AI summary
An obtaining unit obtains, with respect to a plurality of groups of time-course fluoroscopic images that are obtained by acquiring a subject, in at least two directions, each of which intersect, first transition information that indicates transition of a signal intensity of a contrast media in a proximal region to which the contrast media flows earlier than a region of interest. A three dimensional reconstruction unit reconstructs three-dimensional image data in the region of interest such that a value that is obtained by projecting a voxel value approximates a value of a corresponding pixel in each of the groups of time-course fluoroscopic images, the voxel value being represented by second transition information that is obtained by deforming the first transition information with a factor that is related to the contrast media. A display displays the fluoroscopic image with a blood vessel image based on the three-dimensional image data.