What fetal anomaly is being demonstrated in the above image of a fetal head?

When scanning the liver in transverse near the hilum of the right kidney, which structure is seen as an anechoic circular area anterior to the inferior vena cava and superior to the head of the pancreas?

What is the general term used for the visual presentation of the distribution of Doppler signals regardless of the methods?

In this diagram, which artery is indicated by the PURPLEarrow?

This image of a fetal head was taken from a fetus that is believed to have a bilateral carotid artery occlusion.  Which diagnosis would be consistent with these findings?

The abdomen image below was taken from a 31week fetus.  What finding should the sonographer suspect?

In this transverse image of the aorta, what is being measured?

Which structure is indicated by the letter A in this diagram?

In this image, what muscle is indicated by the REDarrow?

A sonogram demonstrates the a 3 cm  an almost isoechoic liver mass in the periphery of the liver near the diaphragm.  Doppler ultrasound reveals a “spoke-wheel” pattern of flow.  What is the most likely diagnosis?