The inclusion and exclusion criteria for the participants
| Inclusion criteria | Exclusion criteria |
| 1. Older than 18 years | 1. Negative ischaemic stroke on DWI or transient ischaemic attack |
| 2. Ischaemic stroke within 7 days of symptom onset | 2. Diagnosis of other cerebrovascular diseases (cerebral haemorrhage, subarachnoid haemorrhage, cerebral venous sinus thrombosis, etc） |
| 3. Ischaemic stroke confirmed by imaging of the brain | 3. Diagnosis of other diseases (epilepsy, central nervous system infection, metabolic encephalopathy, etc） |
| 4. Hospitalisation from emergency or outpatient department | 4. Pregnancy or delivery within the 6 weeks before the study |
| 5. Participants or their legal guardians give their permission to conduct the study by signing an informed consent | 5. Participation in other pharmaceutical or device-based interventional studies |
| 6. With terminal diseases (life expectancy<3 months) or cannot commit to completing the study due to other reasons |
DWI, diffusion weighted imaging.