chapter 5
Help!
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| What is the highest intensity? | SPTP
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| Intensities are important in the study of? | biological effects
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| Which intensity is important in the study of bioeffects? | SPTA
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| Currently, the AIUM states that no biologic effects are confirmed. The AIUM uses what intensity for a focused beam? | <1 W/cm sq.
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| The thermal index is related to? | tissue heating
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| What is the intensity suggested by the AIUM for an unfocused beam? | <100 mW/cm sq.
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| What is directly related to intensities? | duty factor
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| Which is the lowest intensity? | SATA
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| Is The intensity of the beam the same throughout the beam? | no
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| If power remains the same and area is increased, what happens to the intensity? | it decreases
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| If power is increased and the area is decreased, what happens to the intensity? | it increases
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| What best describes the intensity of a continuous wave beam? | the beam is uniform across time but not across space
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| temporal | all time (transmit and receive)
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| pulsed | only transmit time
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| spatial | refers to distance or space
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| What is the unit for measuring intensity? | W/cm squared
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| What are the appropriate knobology adjustments? | (ALARA) overall gain, TGC, then power output
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| Rank the intensities from lowest to highest | SATA, SPTA, SPPA, 1m, SPTP
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Created by:
AshleyLemieux