Dynamic X-Ray Modulation for CBCT Dose and Image Quality
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Solution Overview
Problem
Current Cone Beam Computed Tomography (CBCT) systems face issues with unnecessary overexposure to imaging radiation and poor image quality due to varying patient anatomy attenuation during 360-degree acquisitions, as technique parameters are fixed and do not account for changing attenuation levels.
Innovation Solution
The system modulates the x-ray beam parameters, such as kilovoltage peak (kVp) and milliampere-seconds (mAs), based on real-time attenuation data from the detector, adjusting these parameters to maintain signal within optimal bounds during the 3D acquisition, ensuring consistent image quality and minimizing patient exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed technique parameters are used during 360-degree acquisitions, then the imaging system is simple to operate, but image quality deteriorates due to varying patient anatomy attenuation
Solution Approach 1:
The patent applies dynamics by transitioning from fixed technique parameters to dynamic, real-time modulation of x-ray beam parameters (kVp, mAs, pulse width) based on detected attenuation levels. The system continuously adjusts parameters during the 360-degree acquisition to maintain optimal signal-to-noise ratio, resolving the contradiction between operational simplicity and image quality through automated adaptive control.
Solution Approach 2:
The patent implements feedback by using detector signals that monitor radiation beam attenuation in real-time to control the x-ray source parameters. The system closes the loop by adjusting kVp, mAs, and pulse width based on actual attenuation measurements, ensuring consistent image quality despite varying patient anatomy throughout the acquisition cycle.
2Device complexity
If fixed technique parameters are used, then the device complexity is low, but patient radiation dose increases due to overexposure
Solution Approach 1:
The system dynamically modulates x-ray beam parameters based on real-time attenuation detection, reducing radiation dose during low-attenuation regions and increasing it only when necessary. This eliminates unnecessary overexposure while maintaining adequate signal levels, resolving the contradiction between device complexity and patient radiation dose through intelligent parameter modulation.
Solution Approach 2:
The patent changes physical parameters (kVp, mAs, pulse width) of the x-ray beam based on detected attenuation levels. By continuously adjusting these parameters rather than using fixed settings, the system optimizes radiation dose delivery to match actual anatomical requirements, reducing overall patient exposure while maintaining image quality.
3Manufacturing precision
If dynamic beam parameter adjustment is implemented, then image quality is optimized and patient dose is reduced, but device complexity increases
Solution Approach 1:
The patent makes the x-ray source multi-functional by enabling it to perform both imaging and self-regulation through integrated attenuation detection and automated parameter modulation. The same hardware components (detector, processor, x-ray source) work together to achieve real-time optimization, reducing the need for separate complex subsystems while maintaining high image quality and dose control.
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 optimizes image quality by adjusting beam parameters dynamically, reducing overexposure and improving contrast, while minimizing patient radiation dose by maintaining signal within predetermined boundaries.
Implementation Method 1
an imaging source emitting a radiation beam that is received by the imaging detector
Data Source
AI summary
A system according to at least one embodiment of the present disclosure includes: an imaging source; an imaging detector; a processor; and a memory coupled to the processor and storing data thereon that, when executed by the processor, enable the processor to: initiate a multi-dimensional scan of patient anatomy that includes the imaging source emitting a radiation beam that is received by the imaging detector; receive radiation beam information associated with the radiation beam received by the imaging detector; compare the radiation beam information to a beam threshold value; and instruct, based on the comparing, the imaging source to adjust at least one beam parameter of the radiation beam such that the radiation beam information is compliant with the beam threshold value.