Comparison of Diagnostic Accuracy Between XTR004 PET MPI and the Composite Index of Quantitative Coronary Angiography (QCA) and Fractional Flow Reserve (FFR)

Inclusion Criteria: * Participants aged 18 to 80 years, male or female. * Suspected or confirmed patients with stable coronary heart disease. Those suspected of having stable coronary heart disease must meet at least one of the following risk factors: hypertension, hyperlipidemia, diabetes, obesity (BMI ≥28), a history of alcohol abuse, a smoking history, a family history of coronary heart disease, postmenopausal status, or age 60 years or older. * Participants can communicate well with investigators, understand and comply with clinical trial requirements, voluntarily participate in the study, and sign an informed consent form. Exclusion Criteria: * Participants with severe cardiovascular diseases, including but not limited to unstable angina (Canadian Cardiac Society (CCS) Grade III/IV angina pectoris), uncontrolled hypertension (systolic blood pressure ≥ 180 mmHg and/or diastolic ≥110 mmHg despite long-term regular antihypertensive medication), hypotension (resting systolic blood pressure \<90 mmHg), acute myocardial infarction, second or third-degree atrioventricular block, sinoatrial node disease, NYHA Class III/IV heart failure, dilated or hypertrophic cardiomyopathy, pericarditis, valvular heart disease, aortic dissection, uncontrolled severe arrhythmias, congenital heart disease, those who have undergone coronary artery bypass grafting or interventional procedures within three months, and those determined unsuitable for participation in this study by investigators; …