由于内镜的有效长度和可到达的部位,限制了小肠的内镜检查。尽管有小肠镜,但其操作困难和部分患者对小肠镜检查难以耐受,使小肠镜未能广泛应用于临床。放射技术对小肠疾病的诊断,特别是对较小的、浸润性或炎性病灶的诊断相对不敏感,从而使小肠疾病缺乏有效的诊断手段。以色列GivenImaging公司制造的胶囊内镜使过去无法达到的胃肠道部位的 Due to the effective length of the endoscope and reachable site, limiting endoscopic examination of the small intestine. Despite the small bowel mirror, but its operation is difficult and some patients with refractory enteroscopy, so that the small bowel mirror can not be widely used in clinical. Radiological techniques are relatively insensitive to the diagnosis of small intestine disease, particularly to the diagnosis of small, infiltrative or inflammatory lesions, so that small bowel disease lacks an effective diagnostic tool. Capsule endoscopy made by Israel GivenImaging company in the past can not reach the gastrointestinal site