Edelman chapter 5

Intensities may be reported in various ways with respect to:

• pulse

• time and space

• strength and length

• peak and average

The different measurements of intensities are important in the study of:

• bioeffects

• sonography

• physics

• medicine

_____ is the most relevant intensity with respect to tissue heating.

• SATA

• SPTP

• SPTA

• SPPA

The units for all intensities are:

• watt/cm

• watts/cm2

• watts/cm3

• watt/cm2

Because peak measurements are larger than average measurements, ____ intensity has the highest value, and ____ has the lowest value.

• SPTP
  SATP

• SATA
  SPTP

• SPTP
  SATA

• SPTA
  SATA

A number called the _____ describes the spread of a beam in space. The SP/SA factor is unitless, with a value of 1 or greater.

• temporal peak intensity

• beam uniformity coefficient

• pulse average intensity

• duty factor

The _____ describes the relationship of beam intensities with time. The duty factor is a unitless number with a value between 0 and 1.

• temporal peak intensity

• beam uniformity coefficient

• pulse average intensity

• duty factor

For continuous wave ultrasound, the beam is always "on" and the pulse average and temporal average intensities are the same. Thus SPTA = ____ and SATA = ____.

• SPTP
  SPTA

• SATA
  SPTA

• SPTP
  SPTP

• SPPA
  SAPA

When pulsed and continuous wave sound beams have the same SPTP intensities, the continuous wave beam has the higher ____ intensity.

• SPTA

• SATA

• SATP

• SPPA

When pulsed and continuous wave sound beams have the same SATP intensities, the continuous wave beam has the higher ____ intensity.

• SPTA

• SATA

• SATP

• SPPA