Finger blood flow. Power Doppler ultrasound scan of blood (orange) flowing through a normal finger. Doppler ultrasound scanning detects moving fluids,such as blood,by the frequency change caused when high-frequency sound waves are reflected from the moving fluid. Power Doppler scans detect movement,but not the direction of the movement | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Fermariello, Mauro |
Taille de l’image : | 4792 px × 3783 px |
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