Tomographic simulations with a binary 3-D phantom.
(a, b) Projection images of the phantom tilted about the axis at -50° and -32°, respectively. (c-e) 2-D cross-section of the reconstructed phantom from registering the data with different alignment techniques. (c) Result from our center of alignment method. (d) Result from cross-correlation. (e) Result from originally proposed center-of-mass technique.