2D Angiographic Projection Selection Using Spatial-Angle Mapping

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Solution Overview

Problem

Existing methods for determining optimal two-dimensional angiographic images for 3D reconstruction are time-consuming and burdensome for patients due to the need for additional imaging and radiation exposure, as they rely on post-reconstruction analysis to assess image quality.

Innovation Solution

A method and apparatus that guide the selection of optimal projection images by calculating spatial and differential angles, considering overlap, to determine the best two-dimensional angiographic images without requiring a preliminary 3D reconstruction, using a data processing system to provide an optimal projection map.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If existing methods are used to determine optimal two-dimensional angiographic images for 3D reconstruction, then the accuracy of the three-dimensional reconstruction is improved, but the time consumption and patient burden increase due to additional imaging and radiation exposure

Engineering Contradiction:

Improveaccuracy of three-dimensional reconstructionVSAvoidtime consumption

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by calculating an optimal projection map before acquiring the second two-dimensional angiographic image. The system computes spatial angles and overlap parameters in advance to guide the selection of optimal projection perspectives, eliminating the need for post-reconstruction analysis and avoiding additional imaging procedures.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses the first acquired two-dimensional angiographic image itself to generate the optimal projection map, rather than requiring external or additional imaging data. The image processing unit extracts geometric information from the available image to guide subsequent image acquisition, making the system self-sufficient.

Inventive Principle:

Principle #25Self-service

2Measurement precision

Engineering Contradiction:

Improveaccuracy of three-dimensional reconstructionVSAvoidradiation exposure

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The optimal projection map is calculated before the second image acquisition using geometric parameters derived from the first image. This preliminary calculation identifies the optimal projection angle and overlap characteristics, allowing the system to acquire only the necessary second image without requiring additional corrective imaging procedures.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary optimal projection map that mediates between the first acquired image and the second image to be acquired. This map serves as a guide to select the optimal second projection, ensuring accurate 3D reconstruction while minimizing the number of images required and thus reducing radiation exposure.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of information

If existing methods are used to determine optimal two-dimensional angiographic images for 3D reconstruction, then the completeness of image information is improved, but the workflow complexity increases

Engineering Contradiction:

Improvecompleteness of image informationVSAvoidworkflow complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The system performs preliminary calculation of spatial angles and overlap parameters to generate an optimal projection map before the second image acquisition. This advance planning ensures that the second image will provide complementary information for accurate 3D reconstruction, eliminating the need for iterative analysis and complex post-processing workflows.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces manual trial-and-error image acquisition with an automated image processing unit that calculates optimal projections using geometric algorithms. The system substitutes mechanical workflow complexity with computational efficiency, automatically determining optimal angles and overlap characteristics without manual intervention.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP3206183B1Method and apparatus for user guidance for the choice of a two-dimensional angiographic projection

Publication Date: 2025.10.08 PIE MEDICAL IMAGING

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AI summary

Method for guidance for the choice of projection perspectives to obtain optimal projection images of an object, particularly an asymmetrical object, the method comprising the following steps: a) providing a bi-dimensional image of the object which have been obtained from a first perspective having a first spatial orientation with reference to a system of coordinates; b) defining a set of second perspectives; c) defining a first parameter; d) defining at least one scale of values between a minimum and a maximum for the first parameter with the maximum value being associated to the most optimal perspective and the minimum to the least optimal perspective or viceversa; e) associating a value to such first parameter on such a scale for each of the second perspectives; f) display the value of the first parameter with reference to the system of coordinates as guidance for the choice of an optimal perspective. A corresponding apparatus and computer program are also disclosed.