Is the minor anomaly scan at 28-32 weeks a 4D ultrasound?

Generally speaking, "four-dimensional" refers to a four-dimensional ultrasound examination, which is an advanced ultrasound technique. The minor anomaly scan conducted between 28-32 weeks is not specifically referring to four-dimensional ultrasound; rather, it primarily utilizes two-dimensional ultrasound for structural evaluation. Detailed explanation is as follows:

A minor anomaly scan refers to a systematic structural examination of the fetus, mainly aimed at identifying potential structural abnormalities. This examination is usually performed using two-dimensional ultrasound because it offers higher resolution and clearer imaging, making it more suitable for anomaly screening. Four-dimensional ultrasound provides real-time three-dimensional color images and can display dynamic fetal movements. Although four-dimensional color Doppler ultrasound allows for more intuitive and立体 (stereoscopic) observation of fetal morphology, its resolution is relatively lower, making it less effective than two-dimensional ultrasound for detecting anomalies.

Regardless of the method used, pregnant women should attend regular check-ups at the hospital within the timeframe recommended by their doctors to ensure fetal health.