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Synchronization Design of X-Ray Source and Detector on CBCT Equipment Based on Adaptive Scanning and Time Compensation Algorithm
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DOI：10.1002/ima.70402.png)
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Abstract
En 中文
Cone Beam Computed Tomography (CBCT) is widely used in medical head imaging due to its high resolution, low radiation dose, and excellent three-dimensional imaging capabilities. However, synchronization issues between the stepper motor of the rotating gimbal and the X-ray detector components in head CBCT equipment can degrade CT image quality. This paper proposes an adaptive scanning strategy to intelligently adjust the rotation speed of the stepper motor based on differences in detector acquisition and exposure speed, ensuring the detector obtains continuous and uniform projection data. Additionally, a time compensation algorithm is designed to trigger image acquisition by the X-ray flat panel detector immediately when the gimbal rotates by a specific angle, enabling equally spaced projection image capture. An experimental platform was established for validation, and results demonstrate that the combination of the adaptive scanning strategy and the time compensation algorithm effectively reduces artifacts, distortion, and blurring in CBCT images, significantly improving image quality. This method offers a new solution to the engineering challenge of temporal asynchrony between the rotating gimbal and the X-ray detector in various types of CBCT equipment.
Keywords:
adaptive scanning
CBCT
stepper motor
time compensation
X-ray detector
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