Image reconstruction for a novel SPECT system with rotating slant-hole collimators

We are investigating the use of rotating slant-hole (RSH) collimators on conventional SPECT machines. The main interest in this configuration is the potential for increased photon sensitivity over standard parallel-hole collimator systems. Projection data from an RSH-SPECT system presents a novel but tractable image reconstruction problem. Special features of RSH-SPECT, such as the dimensions of the field-of-view and the rotation requirements of the detector head, are discussed, and image reconstruction is presented in some detail. Data from a Jaszczak cardiac phantom were acquired on an experimental RSH system and reconstructed. Limited-angle artifacts were clearly seen on images reconstructed from a single set of data (classical RSH). The reconstructions from multi-view datasets verify the full tomographic capability of the RSH-SPECT system.<
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