| Objective: Coronary heart disease (CHD) seriously harms human health. Selective coronary angiography (CAG) remains the gold standard to diagnosis of CHD so far. However, the invasive procedure is costly and dangerously. What's more, according to the literature report, there was one million people underwent CAG every year, approximately 72% of all are done to exclude significant stenosis of coronary artery and not followed by percutaneous coronary intervention (PCI). So an alternative non-invasive technique to evaluate coronary arterial stenosis severity would be of great benefit. Recently with the technical development and significantly improved image quality, multi-slice spiral computed tomography (MSCT), as a kind of non-invasive technique, plays a potential role in diagnosis of the patiens with CHD. It is more easily accepted by people than the invasive CAG . The aim of our study is to evaluate the accuracy of 64-slice spiral computed tomography in detecting on coronary artery disease, compared with CAG, using a new retrospectively ECG-gated reconstruction method.Methods: From October 2004 to November 2005, 42 patients (29 males and 13 females; age range 38-75 years ; mean age 61 ± 11 years) suspected CHD were included in our study.
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