Ultrasound image of a fetus in the womb, viewed at 12 weeks of pregnancy (bidimensional-scan)
FDA 的信息:
Medical Imaging > Ultrasound Imaging - Food and Drug Administration
彩超是Color Doppler ultrasound: 顧名思義,影像是彩色的.
Doppler Ultrasound of an Artery
Courtesy of Intermountain Medical Imaging, Boise, Idaho.
Figure 1 shows a color Doppler ultrasound picture of blood flowing through a normal artery (red) and vein (blue). Figure 2 shows an ultrasound picture of an artery narrowed by the buildup of calcium and fat (cholesterol) in the inner lining of the artery, called plaque, which leads to "hardening of the arteries" (atherosclerosis).
