The risk level of moderately echogenic plaques is in between that of strongly and weakly echogenic plaques, and is also assessed in relation to the size, location, symptoms and medical history of the plaque. 1. When the plaque is large, the degree of stenosis is severe, and it is easier to block the blood vessel, so the degree of risk is higher, and vice versa. 2. Plaques located in the carotid artery are more likely to lead to cerebral ischemia and are more dangerous than those located in the arteries of the lower limbs, which are less dangerous. 3. If the plaque is located in the carotid artery, if it is accompanied by transient dizziness, aphasia and other manifestations, it indicates that there are already symptoms of cerebral ischemia, and the risk is greater than that of those who do not have clinical manifestations. 4. If the patient is elderly, has a history of diabetes mellitus or hypertension, and has poor daily glycemic or blood pressure control, the risk is greater than that of a younger person, a person without a history of chronic disease, or a person with a history of disease who has stabilized blood glucose and blood pressure with medication. The term moderate echogenic plaque is usually described in vascular ultrasound reports. Ultrasound describes strong echogenic plaques as stable, weak echogenic plaques as unstable, and moderate echogenic plaques as in-between in terms of stability, indicating that the plaque is in a transitional stage and is at some risk for active treatment and regular review.