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核医学是一门只有30多年历史的新兴学科,它主要是指核素(以前常称同位素)在医学中的应用,也包括核射线的应用。核医学仪器是从事核医学工作必需的工具。因为射线不能被人们的感觉器官直接感知,只有藉某些测量手段才能得知放射性核素的存在、分布和数量。随着核医学的发展和应用范围日益扩大,核医学仪器亦不断出现新的品种,至今已形成一个较为完整的系统。构成医学仪器领域中一个突出的分支。本文就核医学仪器的基本原理作一概括的介绍。一、射线和探测器大家知道,每种元素的原子都不是只存在一种,同一元素原子核中的质子数相同而中子数可以不
Nuclear medicine is a new discipline with a history of more than 30 years. It mainly refers to the application of nuclides (formerly known as isotopes) in medicine, and the application of nuclear rays. Nuclear medicine instruments are necessary tools for nuclear medicine. Because rays can not be directly sensed by people’s sensory organs, the presence, distribution and number of radionuclides can only be known by some means of measurement. With the development and application of nuclear medicine increasing in scope, new varieties of nuclear medicine equipment are constantly emerging, and a relatively complete system has been formed so far. Constitute a prominent branch in the field of medical instruments. This article gives a general introduction of the basic principles of nuclear medicine instruments. First, the ray and the detector We all know that each element of the atom is not only one, the same element in the nucleus of the same number of protons and neutrons may not