Which does not affect the time required to create one image frame?

Which does not affect the time required to create one image frame?

• A. Number of acoustic scan lines
• B. Image depth setting
• C. Transducer aperture
• D. Number of transmit focal zones

Answer: (C)

Frame time is governed by how much data the system must collect for each frame. More acoustic scan lines mean more data to acquire, so the frame takes longer. Increasing image depth adds more samples per line, adding to the amount of data and the time to complete the frame. Having more transmit focal zones requires additional transmissions per line to achieve multiple focus settings, which also lengthens the frame. The transducer aperture affects the beam width and lateral resolution by determining how much of the array is excited, but it does not add extra data or transmissions for a single frame, so it does not change the time needed to create one frame.

Frame time is governed by how much data the system must collect for each frame. More acoustic scan lines mean more data to acquire, so the frame takes longer. Increasing image depth adds more samples per line, adding to the amount of data and the time to complete the frame. Having more transmit focal zones requires additional transmissions per line to achieve multiple focus settings, which also lengthens the frame. The transducer aperture affects the beam width and lateral resolution by determining how much of the array is excited, but it does not add extra data or transmissions for a single frame, so it does not change the time needed to create one frame.