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SemiSPECT: A Small-animal Imaging System Based on Eight CdZnTe Pixel Detectors
Todd E Peterson1, Hyunki Kim2, Michael J Crawford2
1Department of Radiology, University of Arizona, Tucson, AZ 85724 USA.
IEEE Nuclear Science Symposium Conference Record. Nuclear Science Symposium
|November 17, 2015
Summary
A new single-photon emission computed tomography (SPECT) system for small animals was built using eight cadmium zinc telluride (CdZnTe) pixel detectors. This novel system offers detailed imaging capabilities for preclinical research.
Area of Science:
- Medical Imaging
- Nuclear Medicine
- Preclinical Research
Background:
- Small animal imaging is crucial for understanding disease mechanisms and testing therapeutics.
- Existing SPECT systems may have limitations in resolution or sensitivity for specific preclinical applications.
Purpose of the Study:
- To construct and characterize a novel SPECT system optimized for small animal imaging.
- To evaluate the performance of a system utilizing cadmium zinc telluride (CdZnTe) pixel detectors.
Main Methods:
- A SPECT system was designed with eight CdZnTe pixel detectors in an octagonal ring configuration.
- Each detector features a 64x64 pixel array with a 380-micron pitch and 2 mm thickness.
- A listmode electronic readout system was developed to capture gamma-ray event data, including pulse heights of neighboring pixels.
Main Results:
- The system successfully integrated eight CdZnTe pixel detectors for small animal SPECT imaging.
- A specialized electronic readout system was implemented for efficient data acquisition.
- Details of the system design, electronics, and initial performance evaluations are presented.
Conclusions:
- The developed SPECT system provides a new tool for high-resolution small animal imaging.
- The use of CdZnTe pixel detectors and advanced readout electronics demonstrates promising performance for preclinical studies.
- Further characterization and application of this system are warranted for advancing biomedical research.
