1992 Fiscal Year Final Research Report Summary
Reconstruction into stereoscopic semi-transparent images from serial sections
| Project/Area Number |
02557001
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
General anatomy (including Histology/Embryology)
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
YASUDA Mineo Hiroshima Univ. Sch. Med. Professor, 医学部, 教授 (50079688)
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| Co-Investigator(Kenkyū-buntansha) |
KANEDA Kazufumi Hiroshima Univ. Facult. Engin. Res. Associate, 工学部, 助手 (30185946)
SATO Akinao G. Hiroshima Univ. Sch. Med. Assistant Prof., 医学部, 講師 (80034007)
YAMASHITA Hideo Hiroshima Univ. Facult. Engin. Professor, 工学部, 教授 (70034379)
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| Project Period (FY) |
1990 – 1992
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| Keywords | Computer graphics / 3D reconstruction / Stereoscopic figures / Semi-transparent display / Teaching anatomy |
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| Research Abstract |
The contour lines on photos of microscopic serial sections were input on a digitizer with a personal computer. The interrelations between contour lines, together with their branching or confluence, were also specified. The data were transferred to a graphic workstation for further processing. Contour planes were reconstructed by connecting points on two corresponding and neighboring contour lines into small triangular patches automatically. Branching or joining of contour planes, and smooth closure of the tips of tubular structures were also processed automatically. The triangle patches thus obtained were further processed for semi-transparent display. In this process, not only the position of the imaginary light source, but the decrement of light to the reconstructed surfaces were also introduced. Consequently, the reconstructed and smoothed images can be observed very realistically as well as very comprehensively. Not only the entire shapes of original structures, but also the positional interrelationships among various internal structures can be observed very easily and attractively. These images are ideal for teaching anatomy to beginner students. If actual structures are inadequate to observe reconstructed images because of their inessential complexities, as undulating peritoneum and digestive tract for example, diagrammatically drawn sections can effectively be prepared to indicate only simplified essential ideas. In this report, diagrammatic sections were drawn on the basis of such simple wireframe models made on a personal computer, and thoroughly discussed about their validity by stereoscopic observation. Reconstructed stereoscopic images of developing intestine and peritoneum from such diagrammatic sections proved to be excellent as teaching material. Reconstructed images using our system were turned out to be very effective to demonstrate internal abnormal morphology in experimental teratology also.
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