| A | B |
| Pulse Duration | Start of the pulse to the end of the pulse |
| Pulse Repitition Frequency (PRF) | number of pulses transmitted into the body |
| Pulse Repitition Period (PRP) | start of one pulse to the start of another pulse |
| Duty Factor | percentage of time that machine is transmitting a pulse |
| Spatial Pulse Length | Distance that a pulse occupies |
| Pulsed Ultrasound | short bursts of energy to create an image |
| Transmit Time | "Talking Time" |
| Receive Time | "Listening Time" |