Stationary Cone-Beam Breast CT Imaging for Lesion Localization
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Solution Overview
Problem
Current breast imaging techniques, such as mammography and conventional cone beam breast CT (CBBCT), suffer from low sensitivity and specificity in detecting small breast cancers due to poor contrast detectability and tissue overlap, leading to high false-positive rates and patient discomfort from breast compression, which complicates lesion localization and biopsy procedures.
Innovation Solution
A CBBCT system with stationary scan techniques that allow for x-ray imaging along a longitudinal axis normal to the breast section, using supplementary stabilization and compression apparatus to capture detailed images without gantry motion, enhancing image resolution and reducing breast displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional mammography is used for breast imaging, then the imaging process is simple and widely available, but the sensitivity and specificity for detecting small breast cancers are low due to poor contrast detectability and tissue overlap
Solution Approach 1:
The patent segments the breast into multiple cross-sectional slices using cone beam CT imaging, allowing independent analysis of each slice's contrast characteristics. This segmentation enables improved contrast detectability by eliminating overlapping tissue structures that plague conventional mammography, while the modular nature of the imaging system maintains relative simplicity.
Solution Approach 2:
The invention transitions from two-dimensional projection imaging (mammography) to three-dimensional volumetric imaging (cone beam CT). By adding the longitudinal dimension, the system resolves tissue overlap problems and enhances contrast detectability through multi-planar reformats, while the standardized cone beam geometry keeps the system complexity manageable.
2Measurement precision
If breast compression is applied to improve imaging quality, then image detail is enhanced, but patient discomfort increases and breast displacement occurs complicating lesion localization
Solution Approach 1:
The patent employs dynamic compression mechanisms that can be adjusted during the imaging process. The compression force can be modulated to achieve optimal image quality while minimizing patient discomfort, and the system can adapt compression levels based on real-time feedback, thereby reducing breast displacement and improving lesion localization.
Solution Approach 2:
The invention changes the compression parameters by using controlled, variable force application rather than constant high compression. The system can adjust compression magnitude and duration to achieve sufficient tissue stabilization for high-resolution imaging while maintaining patient comfort and preventing excessive breast displacement that would complicate lesion localization.
3Measurement precision
If stationary scan techniques are used without gantry motion, then image resolution is enhanced and breast displacement is reduced, but imaging time increases
Solution Approach 1:
The patent segments the imaging process into multiple stationary scan acquisitions at different positions, each capturing high-resolution data without gantry motion. By acquiring data at discrete stationary positions rather than continuously moving, the system achieves high image resolution while the segmented acquisition pattern manages imaging time through efficient data collection and reconstruction.
Solution Approach 2:
The invention maintains continuity of useful action by performing multiple stationary scans in rapid succession, with the breast remaining in a stable, compressed position throughout. This continuous stabilization approach allows high-resolution imaging without the time penalties of repeated patient repositioning, as the breast remains held in place by the compression mechanism across all stationary acquisition positions.
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
The system provides exceptional detail of the breast and specific regions, improving diagnostic accuracy and reducing patient discomfort by minimizing breast compression, thus enhancing lesion detection and localization.
Implementation Method 1
A CBBCT system with stationary scan techniques that allow for x-ray imaging along a longitudinal axis normal to the breast section
Data Source
AI summary
A cone beam breast computer tomographic imaging system includes a subsystem for stationary scanning such that the same system can produce a cone beam breast computer tomographic image and a 2D stationary scan image.