Ultrasound examination is completed with countless different sections, so the ultrasound probe each time a slight lateral movement of the position of a little, resulting in a section, each section produces a different diameter, no matter how regular the detection of the organ, the different sections will be a different diameter. Ultrasound measurements of the standard diameter, there is a prescribed site, section, position, but that is not a guarantee that the measurement of the data are not bad every time, there are too many human factors. There are too many human factors. The same part of the body is measured differently by each person, and even by the same person, the measurement value will be different every time, one of which is that it is difficult to master the technique, and the standardized diameter line is not so precise as to be infallible, and another is that each doctor’s understanding is also different. Therefore, when you get an ultrasound report, compared with the previous times there is an error, do not be too surprised, ultrasound measurements are like this. The difference of 1 millimeter, 2 millimeters, or even 3 or 4 millimeters in general measurements is not a big problem. However, the doctor will take special care of the key measurements, and the doctor will pay attention to them when he sees the report card, or tell you clearly. When the doctor does not indicate that your key measurements have changed, please do not have too much concern, such as the size of the liver, the size of the spleen, the size of the mass, etc. There are errors.