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Proceedings Paper

Dynamic spatial reconstructor: a high-speed, stop-action, 3-D, digital radiographic imager of moving internal organs and blood
Author(s): Steven Mark Jorgensen; S. V. Whitlock; Paul J. Thomas; R. W. Roessler; Erik Leo Ritman M.D.
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Paper Abstract

The DynamicSpatial Reconstructor (DSR) is a 14 x-ray source video imaging system which operates on the computerized tomography scanning principle. It scans a cylindrical volume 18. 5 cm in axial height with equal resolution in the transverse and axial directions and repeats this volume scan (of up to 240 0. 7 mm thick parallel slices) at 16. 67 ms intervals. The output of each of the 14 video imaging systems is A/D converted shading corrected and stored in 64 megabytes of memory. The memory is used efficiently because the shading correction reduces the gray scale information of the pixels from 12 to 10 bits and because we need record only a selectable region of interest within the full video image. 1_. THE DSR SCANNER SYSTEM The DSR imaging system (Figure 1) consists of 14 rotating-anodeS x-ray sources which sequentially irradiate the object of study during the first 10. 5 ms of each 16. 67 ms sequence. '' Figure 1 - Photograph of the DSR scanner. Note several of the x-ray tubes in left upper corner and array of TV camera electronics in middle. Scanner is cantilevered from bearing just to left of person on left. Tail end of a slip ring assembly is just visible to right of person a t r igh t . High vo 1 tage supp ly is in right lower corner. The x-ray sources lie in

Paper Details

Date Published: 1 January 1991
PDF: 12 pages
Proc. SPIE 1346, Ultrahigh- and High-Speed Photography, Videography, Photonics, and Velocimetry '90, (1 January 1991); doi: 10.1117/12.23346
Show Author Affiliations
Steven Mark Jorgensen, Mayo Medical School (United States)
S. V. Whitlock, Mayo Medical School (United States)
Paul J. Thomas, Mayo Medical School (United States)
R. W. Roessler, Mayo Medical School (United States)
Erik Leo Ritman M.D., Mayo Medical School (United States)

Published in SPIE Proceedings Vol. 1346:
Ultrahigh- and High-Speed Photography, Videography, Photonics, and Velocimetry '90
Paul A. Jaanimagi; Barry T. Neyer; Larry L. Shaw, Editor(s)

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