Three-dimensional modeling and visualization of the cochlea on the Internet

3D modeling and visualization of the cochlea using the World Wide Web (WWW) is an effective way of sharing anatomic information for cochlear implantation over the Internet, particularly for morphometry-based research and resident training in otolaryngology and neuroradiology. In this paper, 3D modeling, visualization and animation techniques are integrated in an interactive and platform-independent manner and implemented over the WWW. L.T. Cohen et al.'s (1996) template shape with mean cross-sectional areas of the human cochlea is extended into a 3D geometrical model. Also, spiral computer tomography data of a patient's cochlea is digitally segmented and geometrically represented. The cochlear electrode array is synthesized according to its specification. Then, cochlear implantation is animated with both idealized and real cochlear models. The insertion length, angular position and characteristic frequency of individual electrodes are estimated online during the virtual insertion. The optimization of the processing parameters is done to demonstrate the feasibility of this technology for clinical applications.

[1]  Isamu Sando,et al.  Computer-Aided Three-Dimensional Reconstruction: A Method of Measuring Temporal Bone Structures Including the Length of the Cochlea , 1989, The Annals of otology, rhinology, and laryngology.

[2]  P. Loizou.  Introduction to cochlear implants. , 1999, IEEE engineering in medicine and biology magazine : the quarterly magazine of the Engineering in Medicine & Biology Society.

[3]  G. Bredberg,et al.  Cellular pattern and nerve supply of the human organ of Corti; a preliminary report. , 1965, Archives of otolaryngology.

[4]  Michael W. Vannier,et al.  Cochlear modeling and visualization on the Internet , 1999 .

[5]  H. Takahashi,et al.  Computer‐aided 3‐D temporal bone anatomy for cochlear implant surgery , 1990, The Laryngoscope.

[6]  Q J Fu,et al.  Effects of noise and spectral resolution on vowel and consonant recognition: acoustic and electric hearing. , 1998, The Journal of the Acoustical Society of America.

[7]  W.A. Kalender,et al.  Unwrapping cochlear implants by spiral CT , 1996, IEEE Transactions on Biomedical Engineering.

[8]  E. Bendet,et al.  Rate and Extent of Early Axonal Degeneration of the Human Facial Nerve , 1998, The Annals of otology, rhinology, and laryngology.

[9]  Steenerson Rl,et al.  The Scala Vestibuli for Cochlear Implantation: An Anatomic Study , 1996 .

[10]  W. Robert J. Funnell,et al.  A VRML-based anatomical visualization tool for medical education , 1998, IEEE Transactions on Information Technology in Biomedicine.

[11]  Maureen C. Stone,et al.  Guest Editor's Introduction: Virtual Reality Modeling Language , 1999, IEEE Computer Graphics and Applications.

[12]  G M Clark,et al.  Improved and simplified methods for specifying positions of the electrode bands of a cochlear implant array. , 1996, The American journal of otology.

[13]  M W Skinner,et al.  Temporal bone volumetric image deblurring in spiral computed tomography scanning. , 1995, Academic radiology.

[14]  G. Wang,et al.  In vivo measures of cochlear length and insertion depth of nucleus cochlear implant electrode arrays. , 1998, The Annals of otology, rhinology & laryngology. Supplement.

[15]  Donald P. Brutzman,et al.  The virtual reality modeling language and Java , 1998, CACM.

[16]  Ge Wang,et al.  Spiral CT image deblurring for cochlear implantation , 1998, IEEE Transactions on Medical Imaging.

[17]  W. Kalender,et al.  Determination of the position of nucleus cochlear implant electrodes in the inner ear. , 1994, The American journal of otology.

[18]  Ge Wang,et al.  Digital X-ray stereophotogrammetry for cochlear implantation , 2000, IEEE Transactions on Biomedical Engineering.

[19]  G. Bredberg,et al.  Cellular pattern and nerve supply of the human organ of Corti. , 1968, Acta oto-laryngologica.

[20]  D. D. Greenwood.  A cochlear frequency-position function for several species--29 years later. , 1990, The Journal of the Acoustical Society of America.

[21]  G M Clark,et al.  Radiologic evaluation of multichannel intracochlear implant insertion depth. , 1993, The American journal of otology.

[22]  Domagoj Cosic.  An open medical imaging workstation architecture for platform-independent 3-D medical image processing and visualization , 1997, IEEE Transactions on Information Technology in Biomedicine.

[23]  Graeme M. Clark,et al.  Computer-Aided Three-Dimensional Reconstruction in Human Cochlear Maps: Measurement of the Lengths of Organ of Corti, Outer Wall, Inner Wall, and Rosenthal's Canal , 1996, The Annals of otology, rhinology, and laryngology.