Static CT imaging method based on multi-line array X-ray sources

Area of Science:

• Medical Imaging
• Physics
• Engineering

Background:

• Static computed tomography (CT) offers advantages in reducing motion artifacts, improving accuracy, and lowering radiation dose.
• Imaging moving organs, such as the heart, presents significant challenges for traditional CT systems due to motion-induced artifacts.
• Advanced 3D measurement technologies are crucial for precision imaging systems, especially for dynamic anatomical structures.

Purpose of the Study:

• To introduce a novel Multi-Array Stationary CT (MASCT) imaging architecture.
• To achieve dual innovations in temporal and spatial resolution for stationary CT systems.
• To validate the feasibility of a multi-array X-ray source-based static CT system.

Main Methods:

• Utilized cold-cathode carbon nanotube X-ray sources for rapid data acquisition.
• Implemented a densely arranged source array to enhance angular resolution.
• Employed a z-axis MAS configuration to extend scanning capacity for elongated objects.
• Incorporated iterative reconstruction algorithms to address the limited-angle problem.

Main Results:

• Achieved high temporal resolution suitable for dynamic imaging due to rapid X-ray source response, low power consumption, and compact design.
• Enhanced spatial resolution through a densely arranged source array and z-axis MAS configuration.
• Obtained diagnostically acceptable image quality by solving the limited-angle problem with iterative reconstruction.
• Validated the system's feasibility through numerical simulations and physical experiments.

Conclusions:

• The proposed MASCT architecture significantly advances stationary CT instrument design.
• The system demonstrates potential for high-quality imaging of moving organs and elongated objects.
• This novel approach offers a promising solution for dynamic imaging applications requiring high temporal and spatial resolution.