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随着现代医学和生物学的发展和进步,一种比 CT 更先进、更准确的新的医疗手段——PET 投入临床使用。PET 是正电子发射断层扫描(Positron Emission Tomography)的英文缩写。它是一种能够反映人体代谢活性的核医学显像仪器,能够从体外定量、动态地观察到人体内的生理、生化变化,从代谢活性、分子水平和受体角度等方面诊断疾病。它利用组成人体主要元素的超短半衰期同位素作为示踪器。这些同位素进入人体后,随人体进行生理、生化等代谢活动,通过计算机断层扫描,显示出人脑、心脏及全身器官的生理和病理活动及代谢状况,经过图像处理和重建,获得三维的人体 PET 图像。目前使用的 B 超、CT、核磁共振等医疗检测仪器,都是从形态
With the development and progress of modern medicine and biology, a more advanced and accurate new medical measure than CT, PET is put into clinical use. PET is an abbreviation for Positron Emission Tomography. It is a nuclear medicine imaging instrument that can reflect the metabolic activity of the human body. It can quantitatively and dynamically observe the physiological and biochemical changes in the human body from the outside and diagnose diseases from the aspects of metabolic activity, molecular level and receptor angle. It makes use of the ultra-short half-life isotopes that make up the major elements of the human body as trackers. These isotopes enter the human body, with the human body for physiological, biochemical and other metabolic activities, by computerized tomography, showing the human brain, heart and body organs of the physiological and pathological activities and metabolic status, after image processing and reconstruction, access to three-dimensional human PET image. Currently used B ultrasound, CT, MRI and other medical testing equipment, are from the form