Value of Super-resolution Ultrasonography in Differentiating Benign and Malignant Lymph Nodes

Exclusion Criteria

• •(1) Pregnant and lactating women; (2)pathological results not indicating benign or malignant lymph nodes; (3) history of chemotherapy or radiotherapy ; (4) History of allergies to eggs, milk, and ultrasound contrast agents; (5) Patients with acute coronary syndrome, severe pulmonary hypertension, or acute respiratory distress syndrome.