United States Patent [»]
Cline et al.
[ii] Patent Number: 4,984,157  Date of Patent: Jan. 8,1991
 SYSTEM AND METHOD FOR DISPLAYING OBLIQUE PLANAR CROSS SECTIONS OF A SOLID BODY USING TRI-LLNEAR INTERPOLATION TO DETERMINE PIXEL POSITION DATAES
 Inventors: Harvey E. Cline, Schenectady;
William E. Lorensen, Ballston Lake;
Siegwalt Ludke, Scotia, all of N.Y.
 Assignee: General Electric Company,
 Appl. No.: 247,183
 Filed: Sep. 21,1988
 Int CI.5 G06F 15/38
 ILS. CL 364/413.13; 364/522
 Field of Search 364/413.13, 521, 522;
 References Cited
U.S. PATENT DOCUMENTS
4,280,178 7/1981 Nassi et al 364/413.18
4,674,046 6/1987 Ozeki et al 364/413.18
4,710,876 12/1987 Cline et al 364/414
4,719,585 1/1988 Cline et al 364/518
4,729,098 3/1988 Cline et al 364/414
4,751,643 6/1988 Lorensen et al 364/414
4,789,933 12/1988 Chen et al 364/413.13
4,868,748 9/1989 Crawford et al 364/413.22
4,914,589 4/1990 Crawford 364/413.17
J. D. Foley et al., Fundamentals of Interactive Computer
Graphics, pp. 255-261, Addison-Wesley Publishing Co.,
Reading Mass., 1982.
Primary Examiner—Michael R. Fleming
Assistant Examiner—Gail O. Hayes
Attorney, Agent, or Firm—Marvin Snyder; James C.
A method and apparatus for displaying arbitrary crosssectional views of a three-dimensional body from a regular array of values of at least one physical property in the interior of the body includes making physical property measurements with such systems as computerized tomographic x-ray systems, or magnetic resonance imaging systems. Cut planes are defined by the user as displacement from, and rotations from, an arbitrary coordinate origin in the data space. An initial plane of pixel positions of arbitrary density is displaced and rotated to correspond to the cut plane. The values for the physical property at the pixel positions are interpolated from the surrounding measurements of actual values. Cross-sectional images are thereby supplied interactively in real time to support, for example, ongoing surgical procedures.
12 Claims, 6 Drawing Sheets