Which intensity descriptor denotes the Spatial Peak Temporal Peak value?

Which intensity descriptor denotes the Spatial Peak Temporal Peak value?

• A. SATA
• B. SPTA
• C. SPPA
• D. SPTP

Answer: (D)

Intensities in ultrasound are described by combining where the energy is in space with how it behaves over time. The descriptor that captures the maximum instantaneous value at the beam’s strongest point in space is the spatial peak temporal peak value, abbreviated as SPTP. It represents the peak intensity reached at the location of highest spatial intensity, measured at the exact moment of the peak, without averaging over time. In contrast, SPPA is the average intensity during the pulse at the spatial peak, SPTA is the average over time at the spatial peak, and SATA is the average over both space and time. So the peak instantaneous value, at the point of maximum spatial intensity, is what SPTP describes.

Intensities in ultrasound are described by combining where the energy is in space with how it behaves over time. The descriptor that captures the maximum instantaneous value at the beam’s strongest point in space is the spatial peak temporal peak value, abbreviated as SPTP. It represents the peak intensity reached at the location of highest spatial intensity, measured at the exact moment of the peak, without averaging over time.

In contrast, SPPA is the average intensity during the pulse at the spatial peak, SPTA is the average over time at the spatial peak, and SATA is the average over both space and time. So the peak instantaneous value, at the point of maximum spatial intensity, is what SPTP describes.