What exactly is the cure for disease? What actually cures a patient’s disease, is it injections? Is it a shot? Is it a pill? Or is it cured by the scalpel? Taking lung cancer as an example, in 2005, there were 172,000 cases of lung cancer in the United States, and 163,000 cases of lung cancer died, and the five-year survival rate was less than 15%; 22 countries in Europe jointly investigated 42 kinds of cancers, covering 1.8 million people, and the five-year survival rate was less than 20%; and our country’s five-year survival rate was less than 10%, and the average was 6-7%. In other words, middle and late-stage lung cancer cannot be cured no matter where it goes and no matter what methods are used. The situation of other tumors is basically the same. However, if diagnosed and treated early, the 5-year survival rate will be more than 90%, and many of them can survive for 10-20 years or even longer. Thus, the fundamental way out to prolong the survival of tumor patients lies in early diagnosis. For some acute diseases, such as heart attack, cerebral infarction, pulmonary embolism, etc., if thrombolysis can be done within 2 hours, the therapeutic effect is 100%; if thrombolysis is done after 6 hours, the effect will be reduced by half; if treatment is done after 12 hours, it will be ineffective. From the perspective of chronic diseases, such as: rheumatoid arthritis, early diagnosis, early treatment, the patient is not disabled, not rigid; if the misdiagnosis of 2 years, 50% of the patients become disabled. Infectious disease is the same, tuberculosis can be cured within a year K; and once misdiagnosed, can infect 22 normal people. Trauma is also the same, to timely reset and fixation, misdiagnosis after the failure to timely reset will cause bone not connected. Therefore, the best medicine, the best surgery is time, only in the early diagnosis of the prerequisite, those drugs, the knife can play the biggest role, once late, what methods are useless. Can medical imaging diagnose diseases at an early stage? For a hospital, there is no clinical department, the hospital runs as usual; however, there can not be no medical imaging department, on this point, the medical imaging department has established its role and status in the hospital. So, does medical imaging have the ability to achieve early diagnosis of diseases? The answer is yes. Medical imaging can detect lesions at an early stage, locate and characterize them accurately, stage the development of the disease, help clinical evaluation of the treatment effect, and follow up. Take pituitary microadenomas for example, clinicians can not see, can not touch, and even in the past film can not see; hyperacute cerebral infarction, ordinary CT, MR can not be seen, will be missed. But now it is different, there are contrast enhancement, dynamic observation, diffusion weighted, perfusion imaging and some other new technologies, can be qualitatively diagnosed before the treatment of the disease, reducing the preoperative “dissection of the chest, abdominal exploration” in the past, improving the prognosis of the patient, prolonging the patient’s life and improving the quality of life. Is early diagnosis based on diagnostic imaging or imaging technology? And who does it depend on to find and discover these signs and evidence that can be characterized? The discovery of diagnostic evidence does not rely on the diagnostician, he or she only plays a role in recognizing and evaluating the diagnostic evidence, which is equivalent to a “judge”. The search for evidence, the collection is by the imaging technician to complete, he (she) is equivalent to the search for evidence of the “detective”. However, the same equipment in the hands of various people, the results of its use is not the same, some lesions are in today’s best multi-row CT examination will also cause misdiagnosis, omission of diagnosis. For example, the same is a small nodule in the lungs, the technical level of the technician to the patient for examination, can only reflect a vague, isolated, slightly increased density of the hair glass-like shadow. The same patient, the same multislice CT scan, and a different imaging technician can produce very different results. He or she made full use of today’s digital technology, such as: plain scan, thin-layer, 3D-SSD reconstruction, injection of contrast, delay and post-processing, although the same cross-sectional scan, the nodule was found to be concave, irregularly lobulated, and poorly demarcated from the normal lung tissues, and was found to be stuck between the bronchi, with an expansive growth and pushing pressure on the surrounding structures, and even multiple nodular shadows were found, which were designated as a space-occupying lesion. For example, for a patient with hemoptysis, the internal medicine has limited efficacy, relying on taking antiemetic drugs and injecting antiemetic injections, which do not treat the root cause; the surgery does not know where the blood comes from; imaging intervention, 80% of which can find the bleeding vessels, but 1/4-1/5 of the patients will have to return after the intervention. Since there are more than 16 rows of high-grade CT, but found that the bleeding foci have several sets of blood vessels supply, which found the cause of treatment failure, followed by one by one to embolize. The same is true for gastrointestinal, urinary, and reproductive tract bleeding; therefore, treatment cannot be separated from diagnostic imaging, and diagnostic imaging cannot be separated from imaging technology. This is from a side more sure of the importance of the technologist, a variety of imaging techniques have to pay attention to, need equipment, technology, time, patience, responsibility. Imaging technologists are in urgent need of self-improvement and self-reliance The medical imaging technologists should strive to face the pressure of digital technology, the pressure of rapid updating of equipments, the pressure of updating knowledge, the pressure of network technology, and the improvement of knowledge level and the updating of concepts. The development of medical imaging is in urgent need of a large number of technical talents, and it is necessary to make full use of information network technology to obtain shared knowledge and accelerate the knowledge reserve. Based on the reality, strive for strength, look forward to the future, the future is bright. Courage to meet the challenges of the 21st century all-digital imaging section of the rapid development of digital technology!