Intensities

Question 1

What does SPTP stand for?

Answer 1

Spatial Peak Temporal Peak

Refers to the maximum intensity of the beam at its peak in both space and time.

Question 2

What does SATP stand for?

Answer 2

Spatial Average Temporal Peak

Indicates the average intensity across the beam’s cross-sectional area at its peak in time.

Question 3

Which intensity is most relevant with respect to tissue heating?

Answer 3

SPTA

SPTA stands for Spatial Peak Temporal Average.

Question 4

What does SATA stand for?

Answer 4

Spatial Average Temporal Average

Represents the average intensity across the beam’s entire cross-sectional area over time.

Question 5

What does SPPA stand for?

Answer 5

Spatial Peak Pulse Average

Refers to the maximum intensity of the beam during a pulse.

Question 6

What does SAPA stand for?

Answer 6

Spatial Average Pulse Average

Indicates the average intensity across the beam during the pulse duration.

Question 7

What is the Beam Uniformity Coefficient?

Answer 7

A measure of how uniform the intensity is across the beam

The closer to 1, the more homogeneous the intensity.

Question 8

What is Spatial Peak Intensity (Isp)?

Answer 8

The beam’s intensity at the location where it is maximum

Critical for understanding localized effects of ultrasound.

Question 9

What is Spatial Average Intensity (Isa)?

Answer 9

The average intensity across the beam’s entire cross-sectional area

Important for assessing the overall energy delivered.

Question 10

What is Temporal Peak Intensity (Itp)?

Answer 10

The intensity of the beam at the instant in time of its maximal value

Reflects the peak moment during the pulse.

Question 11

What is the order of Temporal Intensities from Largest to Smallest?

Answer 11

ltp > Imax > lpa > lta

This ranking helps in understanding the variations in intensity over time.

Question 12

Which intensities are compared in the ranking SPTP > Im > SPPA > SPTA > SATA?

Answer 12

Spatial Peak Temporal Peak, Imax, Spatial Peak Pulse Average, Spatial Peak Temporal Average, Spatial Average Temporal Average

This ranking indicates the relative strengths of different intensity measurements.

Question 13

What is the definition of Imax (Im)?

Answer 13

The maximum intensity of the beam

It represents the peak intensity at any point in time.

Question 14

What is Pulse Average Intensity (Ipa)?

Answer 14

The average intensity during the most intense half-cycle

Important for understanding the energy delivered during each pulse.

Question 15

What is Temporal Average Intensity (Ita)?

Answer 15

The average intensity of the entire pulse repetition period

Useful for evaluating the overall energy output over time.

Question 16

Fill in the blank: The closer to 1, the more _______ across the beam.

Answer 16

homogenous (equal in intensity)

Indicates uniformity in intensity distribution.