The bone density test report is divided into two parts: a graphical and a numerical part, the graphical part is to show the trend of bone density between the patient and the normal age group, and the numerical part is to show the T value and Z value, the T value is to show the standard deviation value of the bone quality of the patient compared with the normal healthy young people. If the T value is between -1 and 1, it means that the patient has normal bone density, and if it is between -2.5 and -1, it means that there is osteoporosis and bone loss. If it is less than -2.5, it indicates that the subject has very severe osteoporosis. In addition, the Z value, which is based on the comparison results of normal people of the same age, if this value is less than or equal to -2, it means that the patient’s bone density is lower than the standard of normal people of the same age, that is, there is osteoporosis compared with people of the same age.