Tomographic Slice Projection for Vascular Recognition
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Solution Overview
Problem
Current techniques for displaying tomographic images of slices in 3D medical images face challenges in recognizing vascular structures without degrading spatial resolution, particularly during the registration of 3D images from different modalities, which affects the precision of image alignment.
Innovation Solution
The method involves identifying slices of interest in 3D medical images, applying projection processing to regions wider than the slice width in the slice axis direction, and displaying projection images to enhance vascular structure recognition without compromising spatial resolution, allowing for precise registration of vascular bifurcations between images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the slice width is set to a relatively small value to improve spatial resolution, then spatial resolution of the tomographic image is enhanced, but information on tissue structures especially vascular structures is reduced making recognition difficult
Solution Approach 1:
The patent divides the image processing into two distinct modes: a first mode for high-resolution tomographic images with narrow slice width to preserve spatial resolution, and a second mode for vascular structure recognition with wider slice width. This segmentation allows each mode to be optimized for its specific purpose without compromising the other.
Solution Approach 2:
The patent introduces a new dimension by generating maximum intensity projection (MIP) images from the 3D medical image data. These MIP images provide a different visual representation that enhances vascular structure recognition while the original narrow-slice tomographic images maintain spatial resolution for detailed anatomical examination.
2Loss of information
If the slice width is excessively increased to improve vascular structure recognition, then more tissue information is contained in the slice, but spatial resolution of the slice is lowered which deteriorates precision of registration
Solution Approach 1:
The patent segments the display system into two separate display regions: one showing high-resolution narrow-slice tomographic images for precise spatial localization and registration, and another showing MIP images with enhanced vascular structure visibility. This allows wide slice width for vascular recognition without compromising the spatial resolution needed for registration precision.
Solution Approach 2:
The MIP images serve as an intermediary representation that translates the 3D vascular information into a 2D projection format optimized for vascular structure recognition. This intermediary allows the system to display enhanced vascular information without altering the original high-resolution tomographic data used for registration.
3Loss of information
If projection processing is applied to regions wider than slice width, then vascular structure recognition is improved, but the processing complexity increases
Solution Approach 1:
The patent performs maximum intensity projection processing in advance on the 3D medical image data to generate MIP images before display. This preliminary action allows the vascular structure information to be pre-enhanced and stored in an optimized format, reducing real-time processing requirements during image display and registration operations.
Data Source
AI summary
Method and apparatus are used to display a slice of tomographic image in a three-dimensional (3D) medical image, for the purpose of achieving better recognition of a vascular structure contained in the slice without degrading spatial resolution of the slice. An example method includes identifying a slice of interest in a 3D medical image representing an anatomical part including a blood vessel; and projecting along a slice axis direction orthogonal to the slice of interest for a region in the 3D medical image including the slice and wider than the slice.