| Project/Area Number |
05680755
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Biomedical engineering/Biological material science
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| Research Institution | University of Tsukuba |
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Principal Investigator |
SHIINA Tsuyoshi Inst.of Information Sciences & Electronics Univ.of Tsukuba, Assistant Professor, 電子・情報工学系, 助教授 (40192603)
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| Co-Investigator(Kenkyū-buntansha) |
ITO Masayasu Fact.of Technology.Tokyo Univ.Agriculture & Technology, Professor, 工学部, 教授
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
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| Keywords | ultrasonic measurement / doppler method / blood flow distribution / 3D display / vector of velocity / 2D arrayd element / 2D arrayd ultrasonic probe / non-invasive measurement / 比侵襲生体計測 |
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| Research Abstract |
Although the color doppler method is widely used, the image does not represent the true veleocity of blood flow because it can measure only one component along the beam direction of three-dimensional velocity.
We presented an idea of measuring three components of blood velocity at any point in the ROI by using two-dimensional array probe. The method has the following merits : real time measurement due to simple and parallel signal processing, and easier implementation compared with other methods due to the extension of conventional color doppler method.
In this work, we examined practical problems for implementation. At first the performance, e.g., spatial resolution, accuracy, sensitivity to S/N and their relation to aperture size were evaluated by simulation analysis and basic experiment using flow phantom. Next the way to display the velocity distribution was investigated because three components for each measured value are plotted in the three-dimensional space and its image must be comprehensible in clincal use. At last the practicability of the method was evaluated.
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