MODEL RELEASED. Echocardiography. 30-year-old patient undergoing a heart ultrasound scan. A transducer,held against his chest,emits ultrasonic waves and detects the reflected echoes. The change in frequency is used to build images (on screen at right) of the heart structures and assess the velocity and direction of blood flow | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Aj Photo / Hop Americain |
Bildgröße: | 3508 px × 2332 px |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |