Kazuo Maeda*
Although no adverse effect of ultrasound diagnosis has been reported, the safety of diagnostic ultrasound has been discussed since its introduction into clinical study in 1950s, because real-time 2D, 3D, 4D ultrasound imaging, pulsed Doppler flow wave, color Doppler, fetal monitor, fetal movement, are indispensable in obstetric and gynecologic studies, particularly in the studies on the fetus.
இந்தக் கட்டுரையைப் பகிரவும்
English 
Spanish 
Chinese 
Russian 
German 
French 
Japanese 
Portuguese 
Hindi 