Development of ultrasound probesNormal : image effect is monochrome, can only observe fetus’s organization structure, measure head circumference, body length. Color: have color Doppler ultrasound probe diagnostic techniques, image is mainly red and blue. 3D: observed fetus from all directions through the screen. 4D: add the dimension of time. B超的发展过程 普通B超 :通过超声探头测得的图像是黑白的,只能观测到胎儿的组织结构,测量头有多大、身有多长。 彩色B超:在普通B超的基础上出现了彩色-多普勒超声波探测诊断技术,观测到的图像以红蓝两色为主。 三维B超:将二维图像合成模型,透过屏幕可从各个方位观察胎宝宝。 四维B超:第四维是指时间这个矢量。
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