Immune fetal hydrops include which of the following fetal findings?

When Trisomy 21 is being ruled out at an early age, the nuchal fold measurement would be abnormal if measured:

Which of the following anomalies is a result from abnormal folding of the embryo by 5 weeks?

A very high Q factor transducer is used more often in diagnostic imaging transducers than a low Q factor.

When the system is imaging deep, the time from one pulse to the next pulse will be short.

Two piezoelectric crystals are made from the same material.  The thicker crystal will make a pulse transducer with a higher frequency. 

The propagation speed for a round trip time of 39 µs is _______ mm/µs.

For short pulses, the quality (Q)factor is equal to:

Reducing the impedance difference between the crystal and the skin is the primary function of which of the following transducer components?

A pulse with a long pulse duration is likely to have a narrow bandwidth.