8 April 1983 Multiple Exposure Holographic Display Of CT Medical Data
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Although the process of computed axial tomography (CAT) yields data from a sample volume, the possibility of fully three-dimensional imaging is not yet exploited by present tomographic systems, which produce a set of planar images. Data from contiguous cross-sectional scans can be combined to provide simultaneous direct three-dimensional visualization of the volume. CT data can be used as an input to several holographic display techniques. We present results of one such technique, the incoherent superposition hologram made from individual planar CT cross-sections. The holographic images are arranged in order corresponding to the method in which they were recorded by the x-ray scanner. Incoherent superposition holography is an additive three-dimensional display, the eye views a volume of data as the sum of light sources from each image. Structure in one plane is less obscured by structure in other planes as compared to coherent holography, of nonholographic displays where light reaching the eye has been attenuated in a multiplicative manner. This type of hologram provides fully three-dimensional depth cues and the ability to focus onto individual cross-sectional images. The recording medium for the incoherent super-position hologram is a silver halide emulsion. The experimental procedure for synthesizing large format holograms is discussed, in particular the method for superimposing holograms that reconstruct images of equal brightness. A method for optimizing this procedure is presented along with the actual incoherent superposition holograms of CT data.
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Kristina M. Johnson, Kristina M. Johnson, Lambertus Hesselink, Lambertus Hesselink, Joseph W. Goodman, Joseph W. Goodman, } "Multiple Exposure Holographic Display Of CT Medical Data", Proc. SPIE 0367, Processing and Display of Three-Dimensional Data, (8 April 1983); doi: 10.1117/12.934313; https://doi.org/10.1117/12.934313

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