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Proceedings Paper

The magic crayon: an object definition and volume calculation testbed
Author(s): David Volk Beard; R. E. Faith; David H. Eberly; Stephen M. Pizer; Charles Kurak; Richard Eugene Johnston
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Paper Abstract

Rapid, accurate definition and volume calculation of anatomical objects is essential for effective CT and MR diagnosis. Absolute volumes often signal abnormalities while relative volumes--such as a change in tumor size--can provide critical information on the effectiveness of radiation therapy. To this end, we have developed the 'magic crayon' (MC) anatomical object visualization, object definition, and volume calculation tool as a follow on to UNC's Image Hierarchy Editor (IHE) and Image Hierarchy Visualizer (IHV). This paper presents the magic crayon system detailing interaction, implementation, and preliminary observer studies. MC has several features: (1) it uses a number of 3D visualization methods to visualize rapidly an anatomical object. (2) MC can serve as a test bed for various object definition algorithms. (3) MC serves as a testbed allowing the comparative evaluation of various volume calculation methods including pixel counting and Dr. David Eberly's divergence method.

Paper Details

Date Published: 14 September 1993
PDF: 8 pages
Proc. SPIE 1898, Medical Imaging 1993: Image Processing, (14 September 1993); doi: 10.1117/12.154562
Show Author Affiliations
David Volk Beard, Univ. of North Carolina/Chapel Hill (United States)
R. E. Faith, Univ. of North Carolina/Chapel Hill (United States)
David H. Eberly, Univ. of North Carolina/Chapel Hill (United States)
Stephen M. Pizer, Univ. of North Carolina/Chapel Hill (United States)
Charles Kurak, Univ. of North Carolina/Chapel Hill (United States)
Richard Eugene Johnston, Univ. of North Carolina/Chapel Hill (United States)

Published in SPIE Proceedings Vol. 1898:
Medical Imaging 1993: Image Processing
Murray H. Loew, Editor(s)

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