|Budget Amount *help
¥1,600,000 (Direct Cost : ¥1,600,000)
Fiscal Year 1998 : ¥600,000 (Direct Cost : ¥600,000)
Fiscal Year 1997 : ¥1,000,000 (Direct Cost : ¥1,000,000)
Basic methods including several computer programs coded by FORTRAN, which will be useful for the three-dimensional modeling and mechanical structural analysis of the cranial bones, were studied and more than 500 cross sections of animal (human included) crania image data were obtained. Crania from 4 specimens which include human, chimpanzee, gorilla, and macaque were scanned by CT (GE CT9800 and Toshiba Xvision) in the three different directions (antero-posterior medlo-lateral, and supero-inferior). The cross sectional data were not output to photographic films. Instead, the data were stored in magnetic tapes or magneto-optical disks. The data were binary and the image format was variable according to the CT units. After succeeded in the extraction of image data from the binary data, the display on the monitor and print-out were carried out. The total of 400 cross sections from the above 4 samples had been scanned by CT9800 at the interval of 5mm or 10mm. In addition, more than hundreds cross sections of human crania were scanned by Xvision at the interval of 1mm or 2mm in the two different directions (antero-posterior and inedio-lateral directions). Another program, on the other hand, which will process the obtained image data to determine the contour or boundary between the air and bone, was developed in the main frame computer using Image Processing Program Library (SPIDER2).