Can the sonographer change the pulse duration?

• A. Yes
• B. No
• C. Sometimes
• D. Not sure

Answer: (B)

Pulse duration is the length of one emitted ultrasound burst. It’s determined by how many cycles are included in that burst and by the period of each cycle, which depends on the transducer frequency. In practice, the sonographer doesn’t directly set how many cycles are in each pulse for a given transmit mode; that is controlled by the transducer and the system’s pulser. Because the burst length is fixed for a given setup, the operator cannot freely change the pulse duration during an exam. You can influence related factors like frequency indirectly by choosing a different probe or mode, but the actual pulse duration isn’t adjustable on the fly.