Cone-beam SPECT provides improved sensitivity for imaging small organs like the brain and heart. However, current cone-beam tomography with the focal point traversing a planar orbit does not acquire sufficient data to give an accurate reconstruction. In this paper, we employ a data-acquisition method which obtains complete data for cone-beam SPECT by simultaneously rotating the gamma camera and...

was vacuum-formed from one piece of clear tenite (Lus-Trus Corporation, Ypsilanti, Michigan). The trough is 5 cm wide, 10 cm deep, and filled with water to a depth of 5 cm. The trough is rotated 2 rpm on a turntable in a darkened chamber. The alternative of rotating the stimulus light, photoconductors, and electrodes around the stationary trough seemed less convenient. The stimulus light is a d...

We demonstrated fast terahertz spectral computed tomography by using real-time line projection of a terahertz beam. Two types of cross-sectional images of continuously rotating samples have been measured in only a few seconds. From temporal data, a peak-to-peak sinogram and cross sections have been reconstructed using a filtered backprojection algorithm. Using fast Fourier transform from tempor...

Using a focused laser beam we stir a 87Rb Bose-Einstein condensate confined in a magnetic trap. We observe that the steady states of the condensate correspond to an elliptic cloud, stationary in the rotating frame. These steady states depend nonlinearly on the stirring parameters (amplitude and frequency), and various solutions can be reached experimentally depending on the path followed in thi...