| Project/Area Number |
12671824
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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 |
病態科学系歯学(含放射線系歯学)
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
KURABAYASHI Tohru Tokyo Medical and Dental University, Graduate School, Associate Professor, 大学院・医歯学総合研究科, 助教授 (60178093)
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| Co-Investigator(Kenkyū-buntansha) |
ISHII Junichi Assistant Professor, 大学院・医歯学総合研究科, 助手 (40222939)
YOSHINO Norio Assistant Professor, 大学院・医歯学総合研究科, 助手 (70220704)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2002: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2001: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2000: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | MRZ / CT / angiography |
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| Research Abstract |
The goal of our investlgation was to utmze less invaslve vascuiar irnaging techniques. CT anglography and MR angiography, for the dtagnosls of maxnlofactal region in the optimai methods.
The optimal imaging parameters of CT anglography were defined and applied to 23 cases with maxillofacial lesions. The injection rate of iodine contrast media should be 2 ml/sec : faster rate than that did not improve the image quality, CT angiography was extremely useful for the cases of AV malformation, however, its value was considered limited for the diagnosis of small vessels.
As to MR angiography, we compared the usefulness of phase contrast and time of flight technique . The former was superior to the latter in that it could provide the vascular images of larger area and visuanze veins of slow flow more clearly. However, it requlres much longer exanaination time, which reduced the clinical validitity. We applied either of these two methods to 15 cases with maximofacial lesions. However, similar to CT anglography, its diagnostic value for small vessels, most of which were of slow flow, was considered limited. On the other hand, we also evaiuated the usefulness of Gadolinium enhanced 3D MR angiography in maxillofacial region. This technique in which contrast media extremely improve the visuanzation of small vessels may be the most optimal one providiog vascular linages of maxillofactal reglon.
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