Women of childbearing ago go through a cycle about _____ days that make it possible to become pregnant.

The usual PRF ranges from

Gain is a ratio of

Which of these could be the Doppler received  frequency if an operating frequency of 5MHz is used to interrogate blood cells moving towards sound source? 

The _________ directs the voltages from the pulser to the transducer during transmission and directs returning echoes to amplifiers during reception.

Axial resolution affects structures that are

What will lower the value of an ultrasound system’s lateral resolution?

Two ultrasound systems have near zone length of 8 cm. At their foci, system Q’s lateral resolution is 3.0 mm and system H’s is 5.0 mm. Which system will correctly display two small structures at a depth of 8 cm? The objects are side by side and are 0.4cm apart.

                                                                                                                                                          The arrows probably indicate all of these EXCEPT

Which of the following focusing techniques is different from the others?