The application of elastography, the principle of its many online, are introduced, here do not repeat, mainly to be able to determine the softness of the tissue, the measured value of the shear wave velocity (acoustic pulse radiation force elastography ARFI) in the form of digital representation, to give a sense of accuracy, the actual and how? Here are a few of my experience in the use of the willingness to communicate with you, there may be errors, would like to listen to the correction of teachers. Using the machine is Siemens S – 2000, ARFI technical support for superficial and abdominal probes. First, poor repeatability. The same site, the same conditions, the interval of 30 seconds measured value, each time is different, some appear normal or abnormal reversal. For example, the thyroid, liver testing. Second, the same site the more repeated testing the higher the measured value, the more lose confidence in testing. Third, the same part of the different conditions measured different values. For example, the liver test, inspiratory breath-holding conditions or natural exhalation breath-holding measurement value is very different, here have avoided the vascular parts. Fourth, the measured value of malignant tumors is higher than the measured value of benign tumors, which has a certain reference value, but each time the measured value is different (pathological review). Fifth, some benign and malignant tumors have similar measurement values, which have no reference value (pathology review). Sixth, the accuracy is poor, and it is almost impossible to distinguish the pathological changes between the two by the measured values, such as identifying the chronic liver fibrosis grading. The above is my clinical experience, and I feel that this technology is immature and needs to be developed. As long as the accuracy of the measurement value can be guaranteed, the potential of its clinical application value is still great.