Orthogonal Compensator Thickness Visualization for Radiation Therapy
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Solution Overview
Problem
Current radiation therapy planning systems face challenges in visualizing and modifying compensator thickness effectively, particularly in proton therapy, as technicians struggle to interpret the impact of compensator adjustments on dose distribution and target coverage due to overlapping elements in beam relative views and lack of clear correlation between compensator thickness and isodose levels.
Innovation Solution
A system that generates planar slice images with view axes parallel and perpendicular to the radiation beam, allowing graphical depiction and adjustment of compensator thickness, target, and dose representation, enabling dynamic updates and clear visualization of correlations, along with automatic updating of compensator thickness value tables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a beam relative view (BRV) is used to display compensator thickness map and dose distribution, then the visualization shows the relationship between compensator and dose, but all elements are overlaid in one plane making it difficult to distinguish individual elements
Solution Approach 1:
The patent divides the visualization into multiple orthogonal planes (axial, sagittal, coronal) rather than displaying all elements in a single beam relative view. Each plane shows specific elements separately, allowing technicians to distinguish individual components while maintaining the ability to navigate between views to understand their relationships.
Solution Approach 2:
The patent transitions from a single 2D beam relative view to a multi-planar 3D visualization system. By adding spatial dimensions through orthogonal planes, the system allows technicians to view compensator thickness and dose distribution from multiple perspectives without element overlap, improving distinguishability while maintaining comprehensive information display.
2Ease of operation
If manual editing of thickness values in a table is performed, then individual compensator thickness values can be modified, but the process is tedious and provides no spatial perspective
Solution Approach 1:
The patent creates a visual copy or representation of the compensator thickness data in the form of orthogonal plane images that mirror the spatial relationships shown in the table. This allows technicians to perform modifications based on spatial visualization rather than abstract table indices, reducing errors and time while maintaining the ability to edit individual values.
Solution Approach 2:
The patent introduces orthogonal plane visualizations as an intermediary between the table data and the technician's decision-making process. This intermediary provides spatial context that bridges the gap between numerical values and their physical locations, making the modification process more intuitive and efficient.
3Productivity
If system-calculated thickness compensator values are used, then the initial dose pattern is established, but the technician cannot quickly visualize the impact of modifications on dose distribution
Solution Approach 1:
The patent implements immediate visual feedback through orthogonal plane displays that update when compensator thickness values are modified. The system shows the relationship between thickness changes and dose distribution changes across multiple planes, allowing technicians to quickly assess the impact of modifications without losing the correlation between thickness and dose information.
Solution Approach 2:
The patent creates a dynamic visualization system where the orthogonal plane displays respond in real-time to compensator modifications. Rather than static images, the system dynamically updates to show how dose distribution changes with thickness adjustments, enabling rapid assessment and iterative optimization of treatment plans.
Data Source
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AI summary
A system (10) for visualizing and modifying the thickness of a compensator (26) for radiation therapy in the context of a desired target and dose coverage thereof includes planar slice image generation module (40), a visualization unit (42) and an adjustment module (44). The planar slice image generation module (40) generates a series of planar slice images (24) from a patient image data set (14) disposed with one axis parallel to a radiation beam and one axis perpendicular to the radiation beam (22). The visualization unit (42) graphically depicts a compensator thickness profile (26), a target of interest (28), and/or a dose representation on at least one of the series of planar slice images (24) all in the same plane lying in a beam's longitudinal direction. The adjustment module (44) receives user input of an adjustment of at least one compensator thickness value via a manipulation of the graphical depiction thereof.