Advances in Doppler Ultrasound Signal Processing for Fetal Monitoring
نویسنده
چکیده
The fetal monitoring is based on a fetal heart rhythm analysis, and aimed at the detection of early symptoms of the intrauterine fetal hypoxia. The most often used method for acquisition of the fetal heart rate (FHR) during pregnancy is the Doppler ultrasound technique. When a penetrating beam is reflected from the moving parts, like valves of the fetal heart, its frequency is shifted according to the Doppler effect. The echoes received by transducer are demodulated to obtain differential frequencies describing the movements of objects within the ultrasound beam.
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