Cylindrical multi-pinhole collimator and imaging device thereof

The invention relates to the technical field of collimators, in particular to a cylindrical multi-pinhole collimator and an imaging device thereof. The collimator comprises a shielding ring, a cylindrical collimation piece, a driving assembly and an imaging ring, a plurality of collimation holes with different radial sizes are formed in the cylindrical surface of the cylindrical collimation piece in a penetrating manner along different directions; the cylindrical collimation piece is installed in the adjusting rotating cavity, and the driving assembly is in transmission connection with the end of the cylindrical collimation piece, so that the cylindrical collimation piece can rotate in the adjusting rotating cavity in the axis direction of the cylindrical collimation piece. The sensitivity and the spatial resolution capability of the collimator can be flexibly adjusted; the imaging device can basically realize complete data sampling of 360-degree circumference of a scanning object in a scanning space; by rota