Term
| 1. Intensities may be reported in various ways with respect to |
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Definition
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| 2. The different measurements of intensities are important in the study of |
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Definition
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| 2. The most relevant intensity with respect to tissue heating |
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Definition
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Term
| 3. All intensities have units of |
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Definition
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| 4. The highest intensity measurement is |
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Definition
SPTP
because peak measurements are more intense that average measurements |
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| 4. The lowest intensity measurement is |
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Definition
| SATA because average intensities have the lowest value |
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Term
| 5. The beam uniformity coefficient (SP/SA factor) describes |
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Definition
| the spread of a beam in space, it is unitless, with a value of 1 or greater |
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Definition
| the relationship of beam intensities with time, it is unitless with a value between 0 and 1 |
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Term
| 7. For continuous wave ultrasound the beam is |
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Definition
always on and the pulse average and temporal average intensities are the same
SPTA = SPPA and SATA = SAPA |
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Term
| 8. When pulsed and continuous wave sound beams have the same SPTP intensities the higher intensity is |
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Definition
| continuous wave has the higher SPTA intensity |
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Term
| 8. When pulsed and continuous wave sound beams have the same SATP intensities, the highest intensity is |
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Definition
| the continuous wave which has higher SATA intensity |
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Term
9. Temporal peak intensity
Itp |
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Definition
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Term
9. Im
intensity is averaged over the |
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Definition
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Term
9. Pulse average intensity
Ipa
is |
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Definition
| averaged only during the pulse duration (on time only) |
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Term
9. Temporal average intensity
Ita is |
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Definition
| averaged during the PRP (both the on and off times) |
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Term
10. Spatial peak intensity
Isp
is |
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Definition
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Term
10. Spatial average intensity
Isa
is |
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Definition
| averaged over the cross-sectional area of the beam |
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Term
| The rank of intensities from largest to smallest is |
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Definition
| SPTP > Im > SPPA > SPTA > SATA |
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