| Project/Area Number |
07671618
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Orthopaedic surgery
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| Research Institution | Saitama Medical School |
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Principal Investigator |
AZUMA Hirohiko Saitama Medical School, The Department of Medicine, Professor, 医学部, 教授 (90049776)
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| Co-Investigator(Kenkyū-buntansha) |
IGARASHI Hayato Saitama Medical School, The Department of Medicine, Assistant, 医学部, 助手 (80232156)
TANEDA Hitoshi Saitama Medical School, The Department of Medicine, Lecturer, 医学部, 講師 (80171867)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1996: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000)
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| Keywords | three-dimensional image / radiograph / solid free-form fabrication / photo polymer resin / hip arthroplasty / 3次元モデル / 股関節 / X線撮影画像 / 3次元ソリッドモデル |
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| Research Abstract |
Three-dimensional surface reconstruction using computed tomography has been widely empoyed in the orthopedic field. On the basis of CT data, three-dimensional images are formed on a monitor that provide a three-dimensional view of the bones. However, this technique has a weakness that the size and position of a lesion can only be assessed on the scale of the display monitor. When CT images are used to provide data for generating bone models, patients must maintain the same posture for a long time because thinner slices are required.
We tried to create three-dimensional models of lesions using the solid free-form fabrication technique on the basis of data from radiographs. This allows shortening of the time required for extracting data, reducing the burden placed on the patient and probably enabling more accurate preoperative evaluation.
The present study was focused on the hip joint, in particular the proximal portion of the femur. Changing from conventional plastercarving to solid free-form fabrication allowed creation of more realistic models of the femoral head. In the generation of models by solid free-form fabrication, the use of different types of photo polymer resin allows easy cutting of the models, and the input of data on the internal structure together with that on the external appearance also enables modeling of the internal architecture of bones. Hip arthroplasty is now widely performed for osteoarthritis, a common hip joint disease, so it is necessary to preoperatively evaluate the morphology of lesions very accurately. The models created in the present study fulfillled this requirement, and this technique appears to have the potential for clinical application.
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