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1 July 1991 Clinical image-intensifier-based volume CT imager for angiography
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A digital angiographic system has been modified into a prototype of an image intensifier-based volume CT imager for angiography. The modified system has been tested by a vascular phantom. The system consists of two x-ray tubes and two image intensifiers that are separately mounted on a gantry. The two tube-detector sets can be rotated over 360 degree(s) in the gantry. To explore the imaging performance of the system for reconstructing a three-dimensional (3D) vascular structure a set of nonsubtraction projections of a vascular phantom, acquired over 36 projection angles, were digitized. These data were reconstructed using an iterative algorithm specially designed for 3D vascular structures. The quality of the reconstructed vascular images indicates that the system can offer adequate signal-to-noise ratio (SNR) for direct 3D vascular reconstruction when only a few projections are used without subtraction procedure, assuming intra-arterial injection of contrast. Also, a pincushion distortion correction algorithm has been developed and the results suggest that the algorithm works well for the image intensifier-based volume CT imager.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ruola Ning, John B. Barsotti, Daniel K. Kido M.D., and Robert A. Kruger "Clinical image-intensifier-based volume CT imager for angiography", Proc. SPIE 1443, Medical Imaging V: Image Physics, (1 July 1991);

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