Focal plane tracking for optical microtomography

摘要

A method for tracking an object (414) in a system for optical tomography, where the object (414) is contained in a tube (410) having a center of rotation (422), the object (414) has a centroid (415), and the object (414) is offset from the center of rotation. Image data is acquired by scanning the object (414) through an extended depth of field while the object (414) is being rotated. A distance value of the object (414) centroid (415) from the center of rotation is calculated from the image data, A rotation angle value (&bgr;R) is caicuiated from the acquired image data. An extent of the object (414) is determined limiting the extended depth of field being scanned to less than or equal to the extent of the object (414) so as to increase image resolution in a resultant pseudoprojection image.