The SSDSR and DSR are the first known CT scanners to provide simultaneous scanning of up to 240 cross sections, that is, synchronous volume scanning. Consequently, the full three-dimensional extent of relatively large organs such as the heart can be captured in one scan procedure and stored in computer memory. The reconstructed 3-D image can then be mathematically (i. e. , non-destructively) sectioned at any angle and displayed as multi-oriented slices through the anatomic volume. New radiographic images (reprojections) of the total volume scanned, or any desired subregion of the total volume scanned, can be formed without additional X-ray exposure, and displayed from any orientation with superimposed structures removed. Shaded surface displays of selected organs and true 3-D volume displays which permit operator interaction are also possible.
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