You are using a linear array transducer with 4 transmit focal zones. How many pulses are required on each scan line to create the image?

You are using a linear array transducer with 4 transmit focal zones. How many pulses are required on each scan line to create the image?

• A. One
• B. Two
• C. Four
• D. Six

Answer: (C)

When a transducer uses multiple transmit focal zones, each zone needs its own distinct pulse to create a beam focused at that depth. To build a single scan line across the image, the system fires one pulse for each focal zone and combines the returned echoes to form that line. So the number of pulses per scan line equals the number of focal zones. With four focal zones, four pulses are required per scan line. This arrangement improves lateral resolution across depths but reduces frame rate due to the extra pulses per line.

When a transducer uses multiple transmit focal zones, each zone needs its own distinct pulse to create a beam focused at that depth. To build a single scan line across the image, the system fires one pulse for each focal zone and combines the returned echoes to form that line. So the number of pulses per scan line equals the number of focal zones. With four focal zones, four pulses are required per scan line. This arrangement improves lateral resolution across depths but reduces frame rate due to the extra pulses per line.