疾病是危害人体健康及生命最主要的因素之一，而早期诊断及治疗是防治疾病的关键。随着医疗水平的发展，许多先进医疗仪器（如彩色B超、各种内窥镜、CT、核磁共振等）广泛应用于临床，使疾病的诊断率及治愈率有了很大提高。但是这些仪器检查特别是对于疾病的性质与分类的判别， Disease is one of the most important factors that endanger human health and life, and early diagnosis and treatment are the key to disease prevention. With the development of medical treatment, many advanced medical instruments (such as color B ultrasound, various endoscopes, CT, nuclear magnetic resonance, etc.) are widely used in clinic, so that the diagnosis rate and the cure rate of diseases have been greatly improved. However, these instruments check especially for the identification of the nature and classification of the disease,