First experimental results from a prototype rotating slit-slat collimator

We have previously found and validated expressions for slit-slat (SS) geometric efficiency and resolution. These expressions have suggested that SS may be a good choice for imaging mid-size objects or objects that are long axially since (i) the geometric efficiency increases near the slit as h⁻1 (instead of h⁻² for pinhole (PIN) and either decreasing near the collimator for fan-beam (FB) or constant for parallel-beam (PB)), where h is the distance from a point to the slit plane; (ii) the transverse resolution is comparable to PIN, which is better than FB and PB for small objects; (iii) the axial resolution is worse than PIN since there is no axial magnification; (iv) there is a large axial FOV, unlike PIN, which is likely to be useful when imaging mid-size or long objects; and (v) there is no need for 3D orbits (e.g., helical) since each slice is complete (like PB and FB).