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Updated: Jun 21, 2026
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Retrospective Cardiac Gating with A Prototype Small-Animal X-ray Computed Tomograph
Published on: February 21, 2025
Gating in small-animal cardio-thoracic CT
Soenke H Bartling1, Jan Kuntz, Wolfhard Semmler
1Department of Medical Physics in Radiology, German Cancer Research Center, Germany. soenkebartling@gmx.de
Methods (San Diego, Calif.)
|August 5, 2009
Summary
Gating is essential for small-animal CT imaging to minimize motion artifacts. This study explores various gating techniques, highlighting intrinsic methods for improved flexibility and accessibility in cardio-thoracic imaging.
Area of Science:
- Medical Imaging
- Veterinary Radiology
- Biomedical Engineering
Background:
- Cardio-thoracic small-animal imaging necessitates gating due to physiological motion during scans.
- Projection-based gating is common in small-animal CT due to scan durations exceeding motion cycles.
Purpose of the Study:
- To present and discuss diverse gating concepts for small-animal CT.
- To provide examples of concrete gating implementations and discuss suitable methods for various scanner systems.
Main Methods:
- Exploration of extrinsic (hardware-based) and intrinsic (data-based) gating signal acquisition.
- Discussion of retrospective and prospective gating strategies based on phase or amplitude.
- Analysis of gating methods tailored to diagnostic needs, scanner types, animal models, and anesthesia.
Main Results:
- Software-based intrinsic gating offers researchers independence from hardware limitations.
- Various gating approaches provide different advantages and challenges depending on the application.
Conclusions:
- Optimizing gating methods is crucial and depends on specific experimental setups and requirements.
- Intrinsic gating represents a significant advancement, enhancing accessibility and flexibility in small-animal cardio-thoracic CT imaging.
