The KST‑3D01 fetal ultrasound phantom is designed with a 7‑month‑old simulated fetus suspended in a simulated amniotic fluid environment. It is used for surface contour presentation and 3D reconstruction in 3D scanning demonstration of ultrasound imaging systems. The simulated amniotic fluid exhibits an anechoic (echo‑free) characteristic in ultrasound imaging, while the simulated fetus shows a distinctly hyperechoic (bright echo) characteristic.

According to the national standard GB10152‑2009, the technical parameters of the fetal ultrasound phantom are as follows:
1. Background simulated amniotic fluid TM material:
Sound velocity: (1540 ± 10) m/s (23 ℃ ± 3 ℃)
Slope of attenuation coefficient: < 0.1 ± 0.02 dB/(cm·MHz) (23 ± 3 ℃)
2. Simulated fetal TM material:
Sound velocity: (1540 ± 10) m/s (23 ℃ ± 3 ℃)
Slope of attenuation coefficient: 0.50 ± 0.05 dB/(cm·MHz) (23 ± 3 ℃)