flying_focal_spot

odl.tomo.util.source_detector_shifts.flying_focal_spot(angle, apart, shifts)

Flying focal spot shifts for divergent beam geometries. Shifts are defined only for grid points of angular partition. For all other angles nearest neighbor interpolation is used.

Parameters

anglefloat or array-like

Angle(s) in radians describing the counter-clockwise rotation of source and detector.

apart1-dim. RectPartition

Partition of the angle interval.

shiftssequence of array-like

Each vectors in a sequence represent a subsequent shift relative to the default source position. Vector elements represent shifts along the following directions: det_to_src, tangent to the rotation (projected on a plane perpendicular to rotation axis), rotation axis.