Distributed X-ray Source Array for Tomosynthesis Resolution
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Solution Overview
Problem
Current radiographic tomosynthesis systems have limited in-depth resolution due to limited angular scanning, and they often require multiple x-ray sources or complex source movements, which complicates the imaging process and increases the risk of patient damage during positioning.
Innovation Solution
A radiographic imaging system utilizing a single x-ray source assembly with multiple distributed x-ray sources, allowing for both standard projection radiography and tomosynthesis imaging, with adjustable collimation and anode sharing to reduce radiation dose and heat distribution, enabling improved in-depth resolution and flexible imaging modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple x-ray sources or complex source movements are used to achieve tomosynthesis, then imaging coverage and resolution are improved, but device complexity and positioning risk increase
Solution Approach 1:
The system divides the x-ray source into multiple distributed sources arranged in a circular pattern around the patient. Each source contributes to a specific angular sector, enabling tomosynthesis through parallel beam geometry without requiring complex single-source movement mechanisms.
Solution Approach 2:
The invention transitions from a single-point source to a distributed array of sources arranged in circular dimensions. This spatial distribution creates multiple projection angles simultaneously, achieving tomosynthesis capability through the geometric arrangement rather than temporal sequencing of source movement.
2Adaptability or versatility
If a single x-ray source assembly is used for both projection radiography and tomosynthesis, then device versatility is improved, but beam control complexity increases
Solution Approach 1:
The system employs dynamically adjustable collimators that can be reconfigured between projection and tomosynthesis modes. The collimators are positioned at different locations and can be independently adjusted to shape beams for either standard projection imaging or distributed tomosynthesis beam geometry.
Solution Approach 2:
A single x-ray source assembly is designed to perform multiple functions: projection radiography, tomosynthesis, and potentially other imaging modes. The source assembly includes multiple x-ray tubes that can be selectively activated and collimated for different imaging applications, eliminating the need for separate source assemblies for different modes.
3Measurement precision
If distributed x-ray sources are used for tomosynthesis, then in-depth resolution is improved, but radiation dose distribution becomes more complex
Solution Approach 1:
Each distributed x-ray source in the circular array is positioned to illuminate a specific local region of the patient's anatomy. The collimators are configured to direct beams only to the necessary regions, optimizing radiation dose distribution by limiting exposure to areas required for diagnostic information while minimizing unnecessary radiation to surrounding tissues.
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 achieves enhanced in-depth resolution and flexibility in imaging modes, allowing for portable and safer tomosynthesis imaging in clinical settings like ICUs and operating rooms, reducing patient risk and improving diagnostic capabilities.
Implementation Method 1
A first x-ray source (710) and a second x-ray source (720) of a radiographic imaging system can include a distributed array of x-ray sources
Data Source
AI summary
Radiographic imaging systems and/or methods embodiments capable of both tomosynthesis x-ray imaging and general projection radiography x-ray imaging can include a single x-ray source assembly including a plurality of distributed x-ray sources, where at least one of the plurality of distributed x-ray sources is configured to output a beam sufficient for standard projection radiography, and each of at least two of the plurality of distributed x-ray sources is configured to output a beam at a lower radiation dose sufficient for tomosynthesis. In one embodiment, radiographic imaging systems and/or methods embodiments can include a single x-ray source; a first collimator that is configured to be adjustable for at least two dimensions; and a second collimator that is configured to provide fixed collimation. In one embodiment, a single x-ray source can include a single radiation shield or a single vacuum chamber.