Abstract: Performing freehand scanning imaging includes transforming a single spatial location with nonuniform input data using NDFT for one spatial location to a singular spectral estimation. Performing freehand scanning imaging also includes translating the singular spectral estimation to zl, wherein zl is a common value of z for which to later recombine data for layer l, and where l begins at zero. Performing freehand scanning imaging further includes performing Inverse Spatial Fourier Transform on the translated spectrum to produce a translated data in a x- and y-spatial domain at z=zl. Performing freehand scanning imaging also includes outputting 3D translated data to an N-dimensional regularization from all measured locations, where all measured locations are regularized data resulting from a combined sum of all measured contributions, and outputting the regularized data to a SAFT algorithm to produce images layer-by-layer, whereby the process is repeated for subsequent layers layer-by-layer.

Abstract: A portable gamma ray computed topography (CT) device configured to capture images includes a projector, a collimator, and a detector. The projector includes an isotope encapsulated within a depleted uranium, and the collimator is affixed to the projector eliminating use of a guide tube. The apparatus also includes a crank cable affixed to the isotope, and is configured to extend the isotope out of projector and into the collimator. The apparatus further includes a detector configured to capture multiple shots on order of hundreds of shots to create a three-dimensional (3D) reconstruction from infield gamma ray images.

Abstract: Non-destructive imaging of an object. An imaging head supported on a rotatable arm samples an electric field scattered by the object at a plurality of locations as the arm rotates about a central axis, with the locations corresponding to a defined spatial domain located remotely from the object. One or more processors execute computer-readable instructions for controlling rotation of the arm and generating a multi-dimensional profile representative of the object in the defined spatial domain based on the sampling.

Abstract: Non-destructive imaging of an object. An imaging head supported on a rotatable arm samples an electric field scattered by the object at a plurality of locations as the arm rotates about a central axis, with the locations corresponding to a defined spatial domain located remotely from the object. One or more processors execute computer-readable instructions for controlling rotation of the arm and generating a multi-dimensional profile representative of the object in the defined spatial domain based on the sampling.