What is the best test for chest and back pain is not clinically clear, but it can be diagnosed by CT examination, electrocardiogram, cardiac ultrasound, thoracic spine magnetic resonance and other tests. 1. CT examination: chest and back pain can be caused by a variety of etiological factors, which can be used to detect and diagnose the disease through chest CT and back CT, such as whether there is local inflammation, infection, tumors, and occupying lesions. 2. Electrocardiogram (ECG): Chest and back pain can also be examined by ECG, which can find out whether the patient has heart enlargement, myocardial ischemia, myocardial infarction, arrhythmia and other diseases. 3. Cardiac ultrasound: This examination can dynamically observe the blood flow and beating of the heart, evaluate the structure of the heart, and help diagnose heart valve disease, cardiomyopathy, heart failure, pericardial effusion, myocardial infarction and other diseases. 4. Thoracic spine magnetic resonance: The examination can clearly show the damage to the spinal cord, intervertebral discs, ligaments or nerves and other soft tissues, such as tumors secondary to intervertebral disc herniation, spinal stenosis and nerve compression. If you have chest and back pain, you can under the guidance of a doctor to carry out the above tests to clarify the cause of the disease and treat the symptoms.