{'fraction_non_alphanumeric': 0.025727069351230425, 'fraction_numerical': 0.0, 'mean_word_length': 4.59375, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Cardiac Micro-CT Using ECG Gating Signal for Small Animal Imaging

Micro-CT system is widely used for small laboratory animals imaging as a pre-clinical technique. The image quality for in vivo micro-CT system is substantially influenced by the physiological motion, e.g. cardiac motion and respiratory motion. In this paper, a cardiac micro-CT system with a CMOS flat panel detector and a pulse generated X-ray tube is presented in details to address this issue. ECG detection circuit is designed to provide a cardiac gating signal as a synchronized trigger for the pulsed Xray generation. In this method, projection images are acquired at each step angle with exact R peak of ECG signal. The CT image is reconstructed using the cone beam FDK algorithm. The proposed method will be used in our micro-CT system to restrain heart motion artifacts. Keywords-Micro-CT, cardiac gating, small animal