Mammography Paddle Contact Area Measurement via Capacitance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mammography apparatuses face challenges in reliably and accurately measuring the contact area between the breast and the paddle, which affects the standardization of mammography operations and patient comfort due to variable pressure application.
Innovation Solution
The use of laminates composed of electrically insulating and low resistance materials on the paddle and x-ray detector, connected to a measurement circuit powered by an alternating current excitation source, allows for electrical measurement of the contact area based on capacitance changes, providing a reliable and accurate assessment of the contact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a contact area measuring device is added to the mammography apparatus, then measurement precision of contact area is improved, but device complexity increases
Solution Approach 1:
The contact area measuring device is integrated into the existing mammography apparatus by combining the paddle structure with the measuring device. The paddle serves dual functions: compression and measurement, eliminating the need for separate measurement equipment and reducing overall system complexity.
Solution Approach 2:
The paddle is designed to perform multiple functions: it acts as both the compression element and the contact area measuring device. This multi-functionality reduces the number of components needed and simplifies the apparatus structure while maintaining measurement precision.
2Manufacturing precision
If pressure is increased to improve image quality, then imaging accuracy is improved, but patient discomfort increases
Solution Approach 1:
The contact area measuring device provides real-time feedback on the compression applied to the breast. This feedback mechanism allows the system to monitor and control pressure levels, ensuring optimal compression for image quality while preventing excessive pressure that would cause patient discomfort.
Solution Approach 2:
The system dynamically adjusts compression parameters based on measured contact area and patient response. By changing pressure parameters in real-time based on feedback, the system optimizes the balance between imaging accuracy and patient comfort.
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 solution enables precise measurement of the contact area, ensuring consistent compression pressure and improved accuracy in mammography imaging while minimizing patient discomfort, facilitating easier retrofitting of existing systems with a flexible and x-ray transparent laminate design.
Implementation Method 1
electrical measurement of the contact area based on capacitance changes
Implementation Method 2
connected to a measurement circuit powered by an alternating current excitation source
Data Source
AI summary
A mammography apparatus is provided for detecting malignant cells in a breast, comprising an x-ray source and an x-ray detector that cooperates with the x-ray source for providing an x-ray image of said breast, and further comprising a paddle for flattening the breast by pressing it against said x-ray detector, and comprising a contact area measuring device for measuring a contact area between the breast and the paddle, wherein the contact area measuring device is embodied with at least a first laminate of an electrically insulating material and an electrically low resistance material, which first laminate is provided on a side of the paddle facing the breast, and wherein the electrically low resistance material is sandwiched between the paddle and the insulating material.