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Visualizing the Surface of a Living Human Brain
March-April 2012 (vol. 32 no. 2)
pp. 55-65
Llyr ap Cenydd, Bangor Univ., Bangor, UK
N. John, Bangor Univ., Bangor, UK
M. Bloj, Univ. of Bradford, Bradford, UK
A proposed method visualizes the surface appearance of living human brain tissue. The goal is to investigate whether realistic models of living anatomy are possible and, if so, whether they provide added value to anatomy education and training simulators. From calibrated photography of exposed brain tissue and suitable alternatives, experiments provided data for a bidirectional reflectance distribution function, which was then used for rendering. Employing a GPU, real-time visualization of the brain's surface supported ambient occlusion, advanced texturing, subsurface scattering, and specularity.

1. J. C. McLachlan et al., "Teaching Anatomy without Cadavers," Medical Education, vol. 38, no. 4, 2004, pp. 418–424.
2. L.K. Chan and M.M. Cheng, "An Analysis of the Educational Value of Low-Fidelity Anatomy Models as External Representations," Anatomical Sciences Education, vol. 4, no. 5, 2011, pp. 256–263.
3. N.I. Phillips and N.W. John, "Web-Based Surgical Simulation for Ventricular Catheterization," Neurosurgery, vol. 46, no. 4, 2000, pp. 933–937.
4. E.P.F. Lafortune et al., "Non-linear Approximation of Reflectance Functions," Proc. Siggraph, ACM, 1997, pp. 117–126.
5. G. Borshukov and J.P. Lewis, "Realistic Human Face Rendering for The Matrix Reloaded," ACM Siggraph 2005 Courses, ACM, 2005, article 13; .
6. E. d'Eon and D. Luebke, "Advanced Techniques for Realistic Real-Time Skin Rendering," GPU Gems 3, H. Nguyen ed., Addison-Wesley, 2007, ch. 14.
7. S. Tariq et al., An Efficient Estimation of Spatially Varying Subsurface Scattering Parameters, tech. report, Inst. for Creative Technologies, Univ. of Southern Calif., 2006.
8. H.W. Jensen et al., "A Practical Model for Subsurface Light Transport," Proc. Siggraph, ACM, 2001, pp. 511–518.
9. C. Donner, and H.W. Jensen, "Light Diffusion in Multi-layered Translucent Materials," ACM Trans. Graphics, vol. 24, no. 3, 2005, pp. 1032–1039.
10. M.K. Hurdal et al., "Investigating the Medial Prefrontal Cortex with Cortical Flat Mappings," NeuroImage, vol. 19, no. 2, 2003.
11. S. Siegel and N.J. Castellan, Nonparametric Statistics for the Behavioral Sciences, McGraw-Hill, 1956.
12. C. Wynn, An Introduction to BRDF-Based Lighting, tech. report, Nvidia Corp., 2000.
1. F. Nicodemus, "Directional Reflectance and Emissivity of an Opaque Surface," Applied Optics, vol. 4, no. 7, 1965, pp. 767–775.
2. S.K. Nayar and M. Oren, "Visual Appearance of Matte Surfaces," Science, vol. 267, no. 5201, 1995, pp. 1153–1156.
3. P. Debevec et al., "High Dynamic Range Imaging," ACM Siggraph 2004 Courses, ACM, 2004, article 14; .
4. P. Debevec et al., "Acquiring the Reflectance Field of a Human Face," Proc. Siggraph, ACM, 2000, pp. 145–156.
5. C. Donner and H.W. Jensen, "A Spectral BSSRDF for Shading Human Skin," Proc. Eurographics Symp. Rendering, Eurographics Assoc., 2006, pp. 409–427.
6. E. d'Eon, D. Luebke, and E. Enderton, "Efficient Rendering of Human Skin," Proc. 18th Eurographics Workshop Rendering, Eurographics Assoc., 2007, pp. 147–158.
7. A.J. Chung et al., "Patient-Specific Bronchoscopy Visualization through BRDF Estimation and Disocclusion Correction," IEEE Trans. Medical Imaging, vol. 25, no. 4, 2006, pp. 503–513.
8. M.A. Elhelw et al., "Photorealistic Modeling of Tissue Reflectance Properties," Computer Aided Surgery, vol. 11, no. 6, 2006, pp. 289–299.

Index Terms:
Image color analysis,Reflectivity,Light sources,Brain modeling,Surface texture,Biological tissues,Real time systems,computer graphics,brain surface,bidirectional reflectance distribution function,image-based rendering,visualization
Llyr ap Cenydd, N. John, M. Bloj, A. Walter, N. Phillips, "Visualizing the Surface of a Living Human Brain," IEEE Computer Graphics and Applications, vol. 32, no. 2, pp. 55-65, March-April 2012, doi:10.1109/MCG.2011.105
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