Can four-dimensional ultrasound detect ear deformity?

4-D color Doppler ultrasound can detect ear deformity, but 4-D color Doppler ultrasound has certain limitations. For smaller organs, if it cannot be photographed directly, there is an error in judging the abnormality result, and the hidden structures such as ear canal and testis are not clearly displayed. Due to the influence of examination time and fetal posture, 4-D color Doppler ultrasound can only record local images for each examination, and there may be certain omissions. Eating sweets before examination helps to photograph images under different fetal postures. Because four-dimensional color Doppler ultrasound examination is mostly within 6 months of pregnancy, it is necessary to cooperate with other items in the later stage of pregnancy to exclude special diseases such as umbilical cord around neck, pulmonary dysplasia, microcephaly and so on.