- Especially, the author made in-depth analysis on needle size selection and the number of biopsy specimens should be taken in each biopsy to ensure the safety and exact result of the intervention, which is considered to be the basis for applying in Vietnam - Describe the possible complications of needle biopsy in detail, evaluate the complication rate and special analysis of complication-related factors, prevention and management complications, which is useful to help the radiologists to prevent and manage complication effectively.