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Updated: Apr 20, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
Published on: February 1, 2016
A stationary computed tomography system with cylindrically distributed sources and detectors
1School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
A novel stationary computed tomography (CT) system, helical interlaced source detector array (HISDA) CT, achieves high temporal resolution by eliminating gantry rotation. This advanced imaging architecture significantly reduces artifacts for improved 3D dynamic imaging.
Area of Science:
- Medical Imaging
- Radiological Technology
- Computed Tomography
Background:
- Current computed tomography (CT) systems face temporal resolution limitations due to gantry rotation speed.
- High temporal resolution is crucial for advanced 3D dynamic imaging applications.
Purpose of the Study:
- Introduce a stationary CT system, helical interlaced source detector array (HISDA) CT, to overcome temporal resolution limits.
- Achieve high temporal resolution in CT imaging without mechanical motion.
Main Methods:
- Utilize a stationary HISDA CT with distributed X-ray sources and detectors.
- Acquire projection data from multiple angles rapidly without object or system motion.
- Employ interpolation for missing data and a Katsevich-type algorithm for reconstruction.
Main Results:
- The HISDA CT system and reconstruction algorithm effectively suppressed cone beam and gap-induced artifacts.
- Increasing helical pitch can further reduce gap-induced artifacts in HISDA CT.
Conclusions:
- HISDA CT presents a promising stationary 3D dynamic imaging architecture.
- The system offers significant advantages in temporal resolution and stationary imaging capabilities.
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