A 33MHz 16. Bit Gradient Calculator for Real-Time Volume Imaging

second image update rate. Jackel and Strasser [5) described the P ARCUM n system. which is used for handling solids This paper describes a gradient calculator which forms an reconstructed from CT scans. An emulation of this system important part of a shading processor being developed for a generated medical images in 38-110 seconds from data sets high resolution high performance real-time general purpose with 2563 elements. Two projects have been proposed from volume imaging system. The proposed architecture overcomes Keio University in Japan. One is a prototype system SCOPE cunent image resolution and frame-rate limitations through the (solid and colored object projection environment) [6] and the use of custom high-speed processors. The gradient calculator other system-which is very similar to GODPA-is the 3Dp4 evaluates three arithmetic operations: a square and add architecture [7}. 3Dp4 bas been simulated in software, and a operation, square-root, and three division operations. Input­ 2563 hardware implementation is estimated to have a output delay time is 30 os with an accuracy of ±O.78%. The throughput of up to 10 frames per second. A commercial image algorithms and implementation in silicon are described in system, the Insight system of Phoenix Data Systems [8], detail. combines hardware and software. It can display complex objects at a "near real-time" rate of about one frame per second.