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The speed-of-sound measurement method using the ultrasonic microscope, the sound speed measuring device, the speed of sound image acquiring method, and an image diagnostic apparatus
The speed-of-sound measurement method using the ultrasonic microscope, the sound speed measuring device, the speed of sound image acquiring method, and an image diagnostic apparatus
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机译：使用超声波显微镜的声速测量方法，声速测量装置，声速图像获取方法和图像诊断装置
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摘要
PROBLEM TO BE SOLVED: To improve the accuracy in observation by increasing S/N of a reflection wave signal.;SOLUTION: A X-Y stage is continuously scanned, and an ultrasonic vibrator is intermittently excited. The ultrasonic vibrator is intensively excited in a short time by a plurality of excitation pulses during intermittent excitation period. Thus the ultrasonic wave can be applied to approximately the same measuring point even in a state that the X-Y stage is continuously scanned. A plurality of reflection wave signals can be obtained by exciting the ultrasonic vibrator several times in a short time. A primary reflection wave signal of high S/N can be obtained by averaging the plurality of reflection wave signals. As a gate pulse for extracting the reflection wave signal is the excitation pulses output from a pulser part when the ultrasonic vibrator is excited, it is stabilized without affected by jitter even when the jitter exists in a trigger signal. Thus a biomedical tissue can be observed as a visible image on the basis of sonic speed.;COPYRIGHT: (C)2006,JPO&NCIPI
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