2009 Fiscal Year Final Research Report
Development of imaging system using heterodyne interferometer with terahertz waves
| Project/Area Number |
19360041
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied physics, general
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
SASAKI Yoshiaki The Institute of Physical and Chemical Research, テラヘルツイメージング研究チーム, 基幹研究所研究員 (90419002)
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| Co-Investigator(Renkei-kenkyūsha) |
MAKI Kenichiro 独立行政法人理化学研究所, テラヘルツイメージング研究チーム, 基幹研究所研究員 (50392121)
HOSHINA Hiromichi 独立行政法人理化学研究所, テラヘルツイメージング研究チーム, 基幹研究所研究員 (10419004)
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| Project Period (FY) |
2007 – 2009
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| Keywords | テラヘルツ / イメージング / ヘテロダイン / CT(Computed Tomography) |
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| Research Abstract |
THz imaging techniques to image the internal structure and map the functional state of various targets are promising and desirable diagnostic tools because of their non-invasiveness under adequate incident power of a few mW. The advantages of THz imaging are that THz-wave radiation is non-ionizing and safe, the observed image has submillimeter-scale resolution, and many materials are relatively transparent to THz waves, including paper, plastics, and cardboard. In this research, we propose an imaging system with a heterodyne detection receiver for high sensitivity imaging. For a practical use, we developed a THz CT imaging system using heterodyne detection method. Furthermore, We demonstrated a depth-resolved 3D imaging based on absorption contrast using the tomosynthesis technique, which is similar to computed tomography except that the number of projections is much smaller. We applied the back-projection method suitable for the constructed detection configuration to an image reconstruction. Using the system, we imaged a paper phantom, and reproduced characters written by pencil.
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[Presentation] THz tomography in digital tomosynthesis2009
Author(s)
Naoki Sunaguchi, Norihide Maikusa, Mina Kawai, Tetsuya Yuasa, Yoshiaki Sasaki, Chiko Otani
Organizer
2nd International Workshop on Terahertz Technology (TeraTech 09)
Place of Presentation
Osaka
Year and Date
20091130-20091203
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