发明名称 |
Apparatus for imaging a blood vessel |
摘要 |
A first measuring light beam of wavelength lambd1 equal to a wavelength at the isosbestic point between oxyhemoglobin and deoxyhemoglobin and a second measuring light beam of wavelength lambd2 differing from the first measuring light beam are incident on the same part of a subject such as a human finger and scan the subject by using an X-Y stage movable in X and Y directions. The first measuring light beam branches into two light beams. One of the two light beams is subjected to a frequency shift by a frequency shifter, while the other is transmitted through the subject. Thereafter, the two light beams are synthesized and a beat component of the synthesized first measuring light beam is detected by a first signal detection section. The first signal detection section outputs a first beat-component detection signal. For the second measuring light beam, a second beat-component detection signal is output in the same manner as the first measuring light beam. A personal computer generates an image signal based on a value of the second beat-component detection signal normalized by the first beat-component detection signal.
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申请公布号 |
US6522911(B1) |
申请公布日期 |
2003.02.18 |
申请号 |
US19990444514 |
申请日期 |
1999.11.22 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
TOIDA MASAHIRO;SATO TOMOO |
分类号 |
A61B10/00;A61B5/00;G01J9/04;G01N21/17;(IPC1-7):A61B5/00 |
主分类号 |
A61B10/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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