发明名称 |
Time-resolved breast imaging device |
摘要 |
A photodetection circuit for use in a laser imaging apparatus comprises a photodetector adapted to respond to a laser pulse exiting from a breast being scanned; a multi-gain preamplifier circuit connected to the output of the photodetector; a switch connected to the output of the multi-gain preamplifier for sampling the output of the photodetector; an RC circuit for spreading the sampled signal; an amplifier connected to the output of the RC circuit; and an integrator for integrating each sample of the output. A time-gating circuit is operably connected to the switch to open and close the switch at regular intervals of time during the occurrence of the output. A laser pulse synchronization circuit is operably connected to the time-gating circuit to provide a signal to the time-gating circuit as to when the laser pulse is expected to arrive at the photodetector.
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申请公布号 |
US6339216(B1) |
申请公布日期 |
2002.01.15 |
申请号 |
US19980199440 |
申请日期 |
1998.11.25 |
申请人 |
IMAGING DIAGNOSTIC SYSTEMS, INC. |
发明人 |
WAKE ROBERT H. |
分类号 |
G01N21/17;A61B5/00;A61B10/00;(IPC1-7):H01J40/14 |
主分类号 |
G01N21/17 |
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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