| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
Unruptured cerebral aneurysms should be observed meticulously as to the changes in size and shape. However, detecting sub-millimeter change is not easy since it is difficult to observe the lesion from the same viewpoint. In this research, we determined the optimal threshold for segmentation to be 0.5 x (maximum intensity + background intensity). We introduced cross-correlation method to register the 3D datasets of a certain patient obtained at different timings. The precisions of registrations were less than 1 mm for skulls and around 1 mm for cerebral arteries. We found that cerebral aneurysms tend to grow not eccentric but uniform way.
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