An algorithm for coded aperture CT using irregular sampling

Abstract

Coded aperture CT is one of emission CT techniques. It uses a gamma camera equipped with a coded aperture in place of a ordinary parallel collimator, and reconstructs three dimensional distribution of radionuclides from a projected data collected only from one direction. We have improved the reconstruction image by an algorithm using non-regular-intervals sampling which takes into consideration the difference between the reconstruction range on calculation and the view of an actual sensor.