联邦德国的林业专家制成了一种利用X光透视病树的便携式电子计算机。仪器向树木发出X光射线,它能被装在树干另一面的检波器接收到。根据接收情况,电脑能确定树木的什么部位含有水份,什么部位已干枯,因为树木的干燥部位穿透X光能力比有水份的部位要差。利用这种电脑,不用在树上钻孔,研究人员就能获得树干内部的三维图像。根据这个图像就能准确地知道,树根的生存能力如何,该树是否还有生长能力。 Forestry experts in the Federal Republic of Germany made a portable electronic computer using an X-ray tree. The instrument emits X-rays to the trees, which can be received by geophones mounted on the other side of the tree trunk. Depending on the receiving situation, the computer can determine what parts of the tree contain water and what parts have dried up, because the dry part of the tree is less capable of penetrating X-rays than the part with moisture. Using this computer, researchers can obtain a three-dimensional image of the inside of a trunk without drilling holes in the tree. According to this image, we can accurately know how well the tree roots survive and whether the tree still has the ability to grow.