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14 September 1993 The magic crayon: an object definition and volume calculation testbed
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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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David Volk Beard, R. E. Faith, David H. Eberly, Stephen M. Pizer, Charles Kurak, and Richard Eugene Johnston "The magic crayon: an object definition and volume calculation testbed", Proc. SPIE 1898, Medical Imaging 1993: Image Processing, (14 September 1993);

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