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Computer‐compatible patient contour plotter
Author(s) -
Simpson Larry D.,
Mohan Radhe,
Henderson Rolland
Publication year - 1977
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594368
Subject(s) - plotter , contouring , minicomputer , computer graphics (images) , calculator , computer science , contour line , graphics , computer graphics , line (geometry) , computer vision , artificial intelligence , physics , mathematics , geometry , meteorology , operating system
The use of a compact, mobile, relatively inexpensive electromechanical patient‐contouring mechanism is described. The system utilizes a Numonics Model 224 graphics digitizer suspended over the patient. The digital X and Y coordinates of the patient contour in either of multiple, parallel transverse, or sagittal planes are inherently accurate to within ±0.25 mm over a total reading area of 60×90 cm. Display features include the interface to an analog 11‐in.×17‐in. X – Y plotter with a variable scale‐down factor for those contours which would otherwise be larger than the plotting surface. The system is easy to use and may also be readily interfaced for on‐line entry of patient contours to calculator‐ or minicomputer‐based treatment‐planning systems.