Photon Counting Imaging Modes for Radiation Dose Optimization
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Solution Overview
Problem
Radiation imaging systems using photon counting detector arrays face challenges in accurately counting and differentiating detection events due to scattering effects, which affect image quality and radiation dose requirements.
Innovation Solution
Implementing multiple imaging modes with distinct counting schemes in photon counting radiation imaging systems, allowing for selection based on the type of object being imaged to balance spatial resolution and radiation dose, and processing detection events differently to enhance image characteristics and spectral ability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If photon counting detector cells are used to count radiation photons, then measurement precision and noise performance are improved, but device complexity increases due to the need for multiple imaging modes and counting schemes
Solution Approach 1:
The system dynamically switches between different imaging modes (first and second imaging modes) depending on the imaging requirements. Each mode employs a different counting scheme that can be activated based on the specific imaging task, allowing the system to adapt its complexity to the actual needs rather than always operating in the most complex mode
Solution Approach 2:
The patent changes the counting parameters and schemes based on the selected imaging mode. By modifying how detection events are counted and processed (different counting schemes), the system optimizes measurement precision for different scenarios while managing overall system complexity through parameter adjustment rather than structural expansion
2Adaptability or versatility
If multiple imaging modes with different counting schemes are implemented, then adaptability and versatility are improved, but device complexity increases
Solution Approach 1:
The photon counting detector system is designed with multi-functionality by incorporating multiple imaging modes within a single detector architecture. The detector can perform different counting schemes (first counting scheme and second counting scheme) to address various imaging requirements such as different object types or spectral analysis needs, making one system serve multiple purposes
Solution Approach 2:
The system dynamically selects and switches between different imaging modes based on the imaging task requirements. This dynamic capability allows the system to be versatile without requiring multiple separate physical systems, as the same hardware can be reconfigured through software or control logic to operate in different modes
3Measurement precision
If photon counting detection is used instead of energy integrating detection, then measurement precision is improved, but the system becomes more sensitive to scattering effects
Solution Approach 1:
The patent converts the potentially harmful scattering effects into useful information by implementing imaging modes that can detect and analyze scattered photons. Instead of simply discarding scattered photons as noise, the system uses specific counting schemes to identify and process them, transforming a harmful factor into a source of additional imaging information that can improve image quality or provide complementary data
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 approach enables the system to produce images with varying spatial resolution and spectral information while optimizing radiation dose, effectively addressing the limitations of scattering effects in photon counting systems.
Implementation Method 1
the object is exposed to radiation comprising photons (e.g., X-rays, gamma rays, etc.)
Implementation Method 2
Respective detector cells are configured to indirectly or directly convert radiation photons impingent thereon into electrical charge
Data Source
AI summary
Among other things, one or more techniques and/or systems are described for defining imaging modes and for operating a photon counting radiation imaging system. A set of imaging modes with different counting schemes may be defined such that counting schemes will count detection events of a set of radiation events in different manners. For example, a first counting scheme may count primary detection events in a primary counter and secondary detection events in a secondary counter. A second counting scheme may count primary and secondary detection events in the primary counter. A third counting scheme may merely count detection events occurring within a primary detector cell associated with the primary counter. A fourth counting scheme may combine energy of detection events into merged energy. A selected imaging mode may be applied to the photon counting radiation imaging system in order to achieve desired image scanning characteristics (e.g., spatial resolution, dose savings, spectral ability).