What is described as the percentage of time that the system transmits a pulse?

The correct answer is Duty Factor, which refers specifically to the percentage of time that an ultrasound system is actively transmitting a pulse compared to the total time that the system is on. It is a crucial parameter in ultrasound imaging as it reflects the efficiency of the system in utilizing energy during the transmission of sound waves.

Duty Factor is calculated by taking the pulse duration (the time the pulse is actively on) and dividing it by the total time period of the pulse cycle (including both transmission and receiving times). This value gives insight into how often the ultrasound system is sending out signals versus receiving echoes, ultimately impacting image quality and frame rate.

Understanding Duty Factor is essential in optimizing ultrasound settings for different imaging scenarios. A higher duty factor may improve the ability to visualize structures, but it can also increase the risk of tissue heating or damage due to prolonged exposure to ultrasonic energy. Thus, monitoring and adjusting the duty factor is key for safe and effective imaging practices.