3D Vascular Imaging via Single Injection Merging
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Solution Overview
Problem
Conventional angiographic x-ray imaging requires separate three-dimensional acquisitions for arteries and veins, necessitating multiple contrast medium injections and x-ray exposures, which increases patient radiation and processing complexity for coherent image presentation.
Innovation Solution
A system that acquires projection images of arterial and venous fill volumes using a single contrast medium injection, combining these images to generate a three-dimensional image of both arteries and veins, reducing the need for additional injections and exposures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate three-dimensional acquisitions are performed for arteries and veins, then complete vascular imaging is achieved, but patient radiation exposure and contrast medium injection次数 increase
Solution Approach 1:
The patent combines arterial and venous imaging into a single three-dimensional acquisition process. The system acquires projection images during one contrast medium circulation cycle, capturing both arterial and venous phases, then reconstructs a unified 3D volume containing both vascular territories. This eliminates the need for separate acquisitions and reduces radiation exposure.
Solution Approach 2:
The system performs preliminary image acquisition and processing during a single contrast medium circulation cycle. By capturing projection images from multiple angles throughout the circulation and performing real-time processing, the system prepares the data for unified 3D reconstruction, allowing both arterial and venous structures to be imaged before the contrast medium is fully cleared.
2Measurement precision
If separate three-dimensional acquisitions are performed for arteries and veins, then complete vascular imaging is achieved, but processing complexity increases
Solution Approach 1:
The patent merges the processing of arterial and venous images into a unified workflow. The system processes projection images from a single acquisition cycle through a combined reconstruction algorithm that simultaneously generates a unified 3D volume containing both arterial and venous structures, eliminating the need to process and register four separate volumes.
Solution Approach 2:
The imaging system is designed with multi-functional capability to handle both arterial and venous imaging within a single acquisition and processing pipeline. The reconstruction algorithm is universal, capable of processing projection data from either phase and generating coherent 3D representations of both vascular territories using the same processing steps.
3Measurement precision
If multiple contrast medium injections are administered, then arterial and venous contrast enhancement is achieved, but patient exposure to contrast medium increases
Solution Approach 1:
The patent combines arterial and venous contrast enhancement into a single contrast medium injection. The system captures projection images during the circulation of one contrast bolus, acquiring arterial phase images when the contrast is in the arteries and venous phase images when the contrast reaches the veins, thereby achieving dual-phase enhancement with one injection.
Solution Approach 2:
The system continuously acquires projection images throughout the entire contrast medium circulation cycle, from arterial injection through venous return. This continuous acquisition ensures that both arterial and venous phases are captured within the single circulation cycle, maintaining contrast enhancement for both vascular territories without requiring a second injection.
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
This approach efficiently generates three-dimensional images of blood-carrying components while minimizing patient exposure to radiation and contrast medium, simplifying image processing and presentation.
Implementation Method 1
an x-ray image of the volume is acquired while the medium is located within the volume. In the x-ray image, structures which contain the medium (e.g., veins and arteries) appear darker
Data Source
AI summary
A system and method includes reception of first two-dimensional projection images of a patient volume, each of the first two-dimensional projection images having been acquired from substantially a respective one of a plurality of projection angles during presence of at least a portion of contrast medium in arteries within the patient volume, reception of second two-dimensional projection images of the patient volume, each of the second two-dimensional projection images having been acquired from substantially a respective one of the plurality of projection angles during presence of at least a portion of the contrast medium in veins within the patient volume, generation, for each of the plurality of projection angles, of a composite two-dimensional image based on one of the first two-dimensional projection images acquired from substantially the projection angle and one of the second two-dimensional projection images acquired from substantially the projection angle, generation of a three-dimensional image based on the generated composite two-dimensional images, and display of an image based on the three-dimensional image.