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一、X射线与物质的相互作用 1.X射线的物理性质大量实验表明,X射线具有双重特性。在空间传播过程中象波的运动,属电磁波的一种。而在发射或被接收时,又呈现离散的能量粒子的形式,就是通常所说的量子或光子。在医学放射学中,X射线呈现一系列的特性:(1)对物质的穿透性;(2)对物质原子产生电离和辐射;(3)能使某些材料发生荧光(可见光);(4)对照相胶片有感光作用;(5)在生物体中产生生物效应。
First, the X-ray interaction with the material 1. X-ray physical properties A large number of experiments show that X-ray has a dual nature. In the process of space spread like wave movement, is a kind of electromagnetic wave. When launched or received, it presents discrete forms of energy particles, known as quantum or photons. In medical radiology, X-rays exhibit a series of properties: (1) penetration into matter; (2) ionization and radiation of matter atoms; (3) fluorescence of certain materials (visible light); 4) sensitive to photographic film; and (5) biological effects in living organisms.