Skip to main content
. Author manuscript; available in PMC: 2008 Apr 4.
Published in final edited form as: IEEE Trans Nucl Sci. 2007;54(3):475–479. doi: 10.1109/TNS.2007.897826

Fig. 5.

Fig. 5

Illustration of the 2D disk sampling sufficiency condition using fan-beam collimation in a single-camera SPECT with a (180 + 2α) degree circular rotation (a), and a triple-camera SPECT with a (60 + 2α) circular rotation per camera (b). In (a), F and F' are the initial and final positions of the collimator focal point circling around the disk. In (b), F1, F2 and F3 are the circular trajectories of the focal points of three collimators on a triple-camera SPECT system. The solid curves correspond to the 60-degree rotation of the cameras, while the dotted curves show the additional 2α-degree rotation needed for sufficient sampling.