What are the five keywords related to reporting intensities of pulsed waves?

What are the five keywords related to reporting intensities of pulsed waves?

• A. Temporal, Peak, Spatial, Pulsed
• B. Spatial, Peak, Average, Pulsed
• C. Peak, Average, Temporal, Pulsed
• D. Spatial, Peak, Average, Temporal, Pulsed

Answer: (D)

In pulsed-wave ultrasound, intensity reporting uses five descriptors that together describe where, when, and how the energy is measured: spatial, temporal, peak, average, and pulsed. Spatial indicates the location within the beam where the intensity is measured (you can have a spatial peak or a spatial average). Temporal refers to when during the pulse the measurement is considered (you can have a temporal peak or a temporal average). Peak means the maximum instantaneous value, while average refers to the mean value over a specified time period (over the pulse duration or the whole exposure, depending on the definition). The descriptor pulsed flags that the energy comes from a pulsed, not continuous, excitation, which affects how the average is calculated. Together, these five keywords cover all the common ways to describe pulsed-wave intensity: spatial, temporal, peak, average, and pulsed. The option that includes all five is the most complete and accurate reflection of how pulsed-wave intensities are reported.

In pulsed-wave ultrasound, intensity reporting uses five descriptors that together describe where, when, and how the energy is measured: spatial, temporal, peak, average, and pulsed. Spatial indicates the location within the beam where the intensity is measured (you can have a spatial peak or a spatial average). Temporal refers to when during the pulse the measurement is considered (you can have a temporal peak or a temporal average). Peak means the maximum instantaneous value, while average refers to the mean value over a specified time period (over the pulse duration or the whole exposure, depending on the definition). The descriptor pulsed flags that the energy comes from a pulsed, not continuous, excitation, which affects how the average is calculated.

Together, these five keywords cover all the common ways to describe pulsed-wave intensity: spatial, temporal, peak, average, and pulsed. The option that includes all five is the most complete and accurate reflection of how pulsed-wave intensities are reported.