Comparative Imaging of XTR004 PET and MIBI SPECT in Borderline Coronary Stenosis

Inclusion Criteria: * 1.Male or female participants aged 18 years or older. * 2.Suspected or known stable coronary artery disease with related symptoms and stable condition, and having at least one coronary artery disease risk factor, including: hypertension, hyperlipidemia, diabetes, obesity, alcohol abuse, smoking, family history of coronary artery disease, postmenopausal status in women, or advanced age. * 3.Underwent coronary CTA within the past 6 months showing 30%-90% stenosis, or indicating mild to moderate-to-severe stenosis. * 4.Able to communicate effectively with the investigators, understand and comply with the clinical study requirements, voluntarily participate in the study, and provide written informed consent. Exclusion Criteria: * 1\. Patients with a history of percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG). * 2.Patients with a prior diagnosis of myocardial infarction, congenital heart disease, cardiomyopathy, myocarditis, or other cardiac diseases. * 3.Patients known to have severe allergic reactions to alcohol. * 4.Patients known to have an allergy or other contraindications to adenosine. * 5.Patients known to be allergic to iodinated contrast agents. * 6.Individuals with significant occupational exposure to ionizing radiation within the past 10 years (e.g., exceeding 50 mSv/year), or exposure to radioactive substances or ionizing radiation for therapeutic or research purposes. * 7.Men and women of childbearing potenti…