SCANNING DEVICE AND METHOD FOR BACK-SCATTER IMAGING WITH A RADIATION BEAM

摘要

A device for ray beam scanning for back scattering imaging is provided. The scanning device includes: a radiation source, a fixed shield plate and a rotary shield body, which are both set between the radiation source and a scanning object. Wherein the fixed shield plate is fixed relative to the radiation source, the rotary shield body can rotate relative to the fixed shield plate. The fixed shield plate includes ray passing area that ray beam from the radiation source can pass through. A ray incidence area and a ray emission area are set respectively on the rotary shield body. The ray passing area of the fixed shield plate is intersected continuously with the ray incidence area and the ray emission area of the shield rotary body to form a scanning collimation hole when the rotary shield body is rotated for scanning. The ray passing area of the fixed shield plate is a linear aperture. The rotary shield body is a cylinder, the ray incidence area and the ray emission area are a series of discrete small holes set in a helix way respectively. In addition, a method for ray beam scanning for back scattering imaging is also provided.