Maximum area sampling scheme for SOLSTICE rotating slat collimator system

A concept of a slat collimator mounted directly on a rotating Solid-State detector has been previously described (2001). The detector consists of a long and narrow CZT assembly spinning to get 2D imaging and revolving around the object to build 3D reconstruction. One fully expects the spinning of a linear detector to produce a circular field of view, which in turn may render the 3D reconstruction more elaborate and user visualization more complex. Choices are either to define the inscribed square (or rectangle) inside the circular field-of-view, or, more economically, define a different spinning scheme that would allow non-circular area of interest. This paper describes such a scheme based on a special case of the curve of constant width: the Reuleaux triangle. Implementation and performance are discussed.