The purpose of this paper was to discuss the possibility of predicting chemical components of stones in urinary system with digital image processing technique. The paper adopts the method of scanning and analysing multiple stones with a diameter of more than 15mm in urinary system by using related digital image processing technique, and mainly, predicating the chemical components by CT illumination. Results indicate that the CT values presented by the stones of the urinary system under different voltages are not completely consistent, and the CT value under the voltage of 120KV is closest to the actual value. A conclusion can be drawn that the chemical components of the stones in urinary system can be predicted by using the digital processing technique, and the prediction results are the most accurate when the prediction is performed under the voltage of 120kv.
