The main imaging methods for lumbar disc herniation are X-rays, CT and MRI. 1. Before the invention of CT and MRI, confirming the diagnosis of lumbar disc herniation and deciding to operate was a very difficult matter. Exploratory surgery is often the main method of treating lumbar disc herniation, with the very obvious disadvantage that the severity of the disease cannot be determined preoperatively. Only temporary responses can be made according to the intraoperative situation. 2, while the development of modern imaging provides doctors with a powerful weapon, so that they know the internal condition of the patient before surgery, and can establish a perfect surgery plan before surgery, which greatly reduces the blindness of exploratory surgery and ensures the success rate of surgery as much as possible. The necessary preoperative imaging tests for lumbar disc herniation include, x-ray, CT and MRI, one of which is missing. X-rays and CT alone, without MRI, often leave behind important disease in adjacent segments, such as tumors in other areas. X-rays and MRI alone without CT often leave behind calcified disc herniation, which affects the judgment of the scope of surgery and the difficulty of operation. Performing only CT and MRI without x-ray examination of the front and side, power and double oblique positions may miss the determination of isthmic fissure and lumbar instability. Therefore one of the three is not necessary. If it is a census rather than a decision to operate, MRI is the best because it has the largest scope of examination and can detect tumors that cannot be detected by CT and X-ray, and it is better than CT examination in determining the shape of herniated disc. 3. Because of the national conditions in China, there are many TCM doctors practicing in China. In clinical work, there are often patients who say: that doctor felt and said I have a slipped lumbar spine and a dislocated sacroiliac joint. That doctor felt it and said I have a herniated lumbar disc, so feel me too to see if I have a herniated lumbar disc? Strictly speaking, both of these problems are misconceptions caused by a lack of understanding of the disease, and of course, they are also related to some bad doctors who net big words. It should be said that without a very serious slippage, it is impossible for a doctor to diagnose a herniated lumbar disc or slipped lumbar spine by hand touch. Unless there is a serious car accident, it is even more nonsense to feel the sacroiliac joint dislocation with human hands.