A diagnostic aid in which high-frequency sound waves are used to detect the presence of normal and abnormal pregnancies and pelvic tumors. It is used also to locate the placenta and to measure the fetal biparietal diameter.
A procedure using sound waves to distinguish between a liquid-filled cyst and a solid mass. Also called ultrasound. Making a Diagnosis
The use of ultrasound pictures in diagnosis.
Test where images are formed from echoes of the sound waves.
The use of ultrasound to form an image of the fetus.