Examination technology and experience: Different doctors have different technical level and experience, which will affect the observation and evaluation of lymph nodes. Experienced doctors can judge the size, shape and structure of lymph nodes more accurately.
2. Subjective factors: doctors' subjective judgments will be different. Doctors will make an evaluation based on their own experience and observation, and will get different results.
3. Inspection conditions and equipment: Different medical institutions use different color ultrasound equipment, and the inspection conditions and quality of the equipment will also have an impact on the results.