Multi-source Cone Beam CT with Rotating Divergent Sources
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Solution Overview
Problem
Conventional CT technologies face limitations in achieving high image accuracy and efficiency, particularly in applications like implantology and interventional radiology, due to the need for longer scan times and higher radiation doses compared to cone beam computed tomography (CBCT).
Innovation Solution
The apparatus employs two divergent radiation sources and an image sensor that rotate around the object, with a controller managing the activation and blocking of radiation sources, and a collimator with radiation transmitting and blocking zones to optimize image capture, allowing for the stitching of images from different portions of the object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional CT technology is used to achieve high image accuracy, then image quality is improved, but scan time increases and radiation dose increases
Solution Approach 1:
The patent divides the imaging task into multiple segments by using multiple radiation sources positioned at different locations. Each source captures a specific portion of the object, and the images are later stitched together to form a complete high-accuracy image, thereby reducing the time required compared to conventional single-source CT scanning.
Solution Approach 2:
The patent transitions from a single-source sequential imaging approach to a multi-source parallel imaging approach. By adding the dimension of multiple radiation sources operating simultaneously at different angular positions, the system achieves both high image accuracy and reduced scan time.
2Measurement precision
If conventional CT technology is used to achieve high image accuracy, then image quality is improved, but radiation dose increases
Solution Approach 1:
The patent segments the radiation exposure by using multiple sources that each illuminate only a specific portion of the object. This localized approach reduces the total radiation dose compared to conventional CT which exposes the entire object to high doses sequentially, while still achieving high image accuracy through image stitching.
Solution Approach 2:
The patent applies partial action by having each radiation source illuminate only the necessary portion of the object rather than the entire object. This reduces the cumulative radiation dose while maintaining sufficient image quality for the imaged regions through coordinated multi-source capture and stitching.
3Productivity
If multiple radiation sources are used to reduce scan time and radiation dose, then imaging efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple radiation sources and their corresponding detection systems into a single integrated apparatus. The sources are positioned at fixed angular locations around the object, and their images are computationally stitched together, creating a unified multi-source imaging system that improves efficiency while managing complexity through integration.
Solution Approach 2:
The patent creates a universal imaging apparatus that can perform both conventional sequential imaging and accelerated multi-source parallel imaging. The system maintains compatibility with standard imaging protocols while adding the capability for rapid multi-source capture, thereby improving productivity without completely redesigning the base system.
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 improved image accuracy and reduced radiation doses by allowing for efficient image stitching and precise control over radiation exposure, enhancing the capabilities of CBCT in various medical applications.
Implementation Method 1
a first radiation source configured to produce a first divergent beam of radiation toward an object; a second radiation source configured to produce a second divergent beam of radiation toward the object
Implementation Method 2
The radiation blocking zone is configured to block radiation that would otherwise incident on a dead zone of the image sensor, and the radiation transmitting zones are configured to transmit at least a portion of radiation that would incident on active areas of the image sensor
Data Source
AI summary
Disclosed herein is an apparatus comprising: a first radiation source configured to produce a first divergent beam of radiation toward an object; a second radiation source configured to produce a second divergent beam of radiation toward the object; and an image sensor. The image sensor, the first radiation source and the second radiation source are configured to rotate around the object, and relative positions among the image sensor, the first radiation source and the second radiation source are fixed during rotation around the object. The method of using the apparatus is also disclosed herein.