DETERMINATION OF DENSITY

摘要

A method of radiological examination of an object for determining the volumetric electron density of a predetermined interrogation region of the object is described. The method comprises the steps of: irradiating the predetermined interrogation region of an object under test with high energy radiation such as x-rays or gamma-rays and collecting radiation emergent from the object at a suitable detector system in such manner that emergent radiation intensity data is collected for the interrogation region of the object under test; numerically processing the radiation intensity data to obtain a first data item correlated to the total number of electrons within the interrogation region; using a non-radiological measuring technique to obtain a second data item correlated the volume of the interrogation region; using the first and second data items to derive an indication of the mean volumetric electron density of the interrogation region.