2012 Fiscal Year Final Research Report
Clinical application of intraoperative 3D x-ray images and development of next generation navigation system
| Project/Area Number |
22791377
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Orthopaedic surgery
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| Research Institution | Osaka University |
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Principal Investigator |
MASAKI Takao 大阪大学, 大学院・医学系研究科, 助教 (30528253)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 3D-fluoroscopy / CT-3D-fluosocopy matching navigation / Orthopaedic surgery |
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| Research Abstract |
First, we compared three-dimensional skeletal image quality of a mobile C-arm equipped with a flat panel detector with that of a mobile C-arm equipped with an image intensifier using a dry femoral bone with metal wires．The flat panel detector-equipped C-arm provided higher quality 3D images of a dry femoral bone regardless of presence of metal wires. Second, we developed the new navigation system or the CT -3D-fluoroscopic matching navigation system and applied it to the pelvic and femoral regions. The mean target registration error over the pelvis was 0.8 mm with the imaging center on the ilium. The mean target registration error over the proximal femur was 1.1 mm with the imaging center on the femoral shaft at the level of the lesser trochanter, Third, we performed a surgical simulation study in order to determine whether 3D-fluoroscopic navigation combined with a preoperative CT -based plan could enable surgeons to perform safe and reliable iliosacral screw in sertion. The CT-3D-fluoroscopy matching navigation system reduced the malposition rate of percutaneous iliosacral screw insertion even when performed by less experienced surgeons.Finally, we applied the CT-3D-fluoroscopy matching navigation system for treatment of pelvic ring fractures and arthroscopic treatment. The use of our navigation system was advantageous in terms of less invasiveness, accuracy and safety especially in technical demanding procedures.
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