Method and device for detecting object by using forward scattered radiation

Abstract

The invention discloses a method and a device for detecting an object by using forward scattered radiation. The method comprises the following steps: detecting a first penetration value after the interaction between first radiation generated by a radiation source and a detected object; making second radiation generated by the radiation source interact with a scatterer so as to generate the forward scattered radiation having a preset angle with the second radiation; detecting a second penetration value after the interaction between the forward scattered radiation and the detected object; and obtaining material attribute information of the detected object by using the detected first penetration value and the second penetration value. The method and the device can be applied to detection of goods without opening boxes at customs houses, harbors and airports, and can also be applied to biological studies or medical detections.

Description

technical field [0001] The invention relates to radiation inspection of objects, in particular to a method and equipment for inspection of materials in large and medium-sized objects such as shipping and air containers. Background technique [0002] In the existing field of X-ray radiation imaging, the main method used in the early stage is to let the single-energy ray interact with the object to be inspected, and then detect the ray after interacting with the object to be inspected to obtain an image. This method can reflect changes in the shape and mass thickness of the inspected object, but it cannot identify the material of the object. Later, the method of using the dual-energy method to identify the effective atomic number of a substance was proposed, and was soon applied to various fields such as medical imaging and luggage detection. The theoretical basis of the dual-energy method for identifying matter is that when X-rays of different energies interact with an objec...

AI Technical Summary

Problems solved by technology

In Patent Document 3, the difference between the energy spectra of the two beams of X-rays obtained by the material absorption method is limited, resulting in a limited range of accurate material identification, and the method of alternately generating high and low energy rays with different energy spectrums by the accelerator has a great impact on Accelerator stability requirements are too stringent, making it difficult to apply the method

[0006] Patent Document 4 (US 2007 / 0098142A1) proposes a method of simultaneously detecting backscattered radiation and forwardscattered radiation to increase the amount of information, but does not propose to apply it to material identification

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