ch 1-6 ultrasound physics formulas

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10 Terms

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wavelength

1.54 mm/microseconds divded by frequencies (MHz)

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intensity

power (w) / area (cm²)

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duty factor

pulse duration/pulse repetition period

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power

proportional to amplitude ²

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frequency

1/period (T)

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pulse duration

number of cycles X 1 period (T)


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spatial pulse length

number of cycles X wavelength


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intensity

proportional to amplitude ²

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attenuation coefficient

in soft tissue, atten coeff. is approximately half of the frequency 0.5 dB/cm/MHz

10
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P.O.R.N.N

perpendicular, orthogonal, right angle (normal), ninety degrees