| Project/Area Number |
07672052
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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 | Kagoshima University |
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Principal Investigator |
SATO Tsuyoshi Kagoshima University, Dept. of Dental Radiology, Associate Professor, 歯学部, 助教授 (90136888)
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| Co-Investigator(Kenkyū-buntansha) |
NOIKURA Takenori Kagoshima University, Dept. of Dental Radiology, Professor, 歯学部, 教授 (40102561)
KAWASHIMA Kiyomi Kagoshima University, First Dept. of Maxillo-facial Surgery, Research associate, 歯学部, 助手 (40145511)
濱本 定俊 鹿児島大学, 歯学部, 助手 (30244255)
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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 |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1996: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1995: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Scintigraphy / Early image / Malignant tumor / Blood flow / Head and Neck / Scintigrashy / Blood flow |
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| Research Abstract |
In the experiment with animals, Japan white rabbits transplanted with VX2 carcinoma in the right femoral regionwere examined histologically, angiographically and hydrodynamically. The tumor blood vessel became rich in accordance with tumor growth and the blood flow rate and the volume of the blood flow of the right femoral artery in the tumor side was approximately twice or three times as much as that in the control side (left femoral artery) by means of the ultrasonic blood flow meter (5 MHz). In the clinical examination, 117 patients with oral cancer were examined scintigraphically and histopathologically. Tumor blood flow was estimated scintigraphically immediately after administration of <@D199m@>D1Tc-HMDP.Radioactivity of venous phase (30 to 40 seconds after administration) and blood pool phase (1 to 3 minutes) were observed. Radioactive ratios of tumor to the control region in both phases were calculated ; venous ratio (VR), blood pool ratio (BPR). Early image with <@D199m@>D1Tc-HMDP (early image) was obtained 5 minutes after administration and the image with <@D167@>D1Ga-citrate (Ga-image) was obtained 3 days after administration. Tumor vascular patterns were classified histopathologically into three groups ; rich, intermediate and poor. VR,BPR,early image, Ga-image, vascular pattern and tumor size were compared each other. Poor vascular pattern showed small VR (M(]SY.+-。[)SD=0.97(]SY.+-。[)0.08) and BPR (1.02(]SY.+-。[)0.04). Rich vascular pattern showed large VR (1.39(]SY.+-。[)0.01) and BPR (1.31(]SY.+-。[)0.16). Positive early image was predominant among large VR (78%) and BPR (100%). Tumors of under 3 cm in size showed that 65% of them belonged to intermediate or rich vascular pattern and positive early image reflected tumor blood flow. These results intimated the improvement of detecting ratio by combining early image (blood flow image) with delayd image.
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