Percent, Decibel, SPTA intensity, Mechanical index

Which of the following is (are) used currently to

indicate output on the display?

Intensity at the transducer, Distance to the fetus, Frequency

Which of the following affect(s) exposure of a

fetus?

There is no possible hazard involved in the use of

 diagnostic ultrasound.

No independently confirmed, significant bioeffeets

in mammalian tissues have been reported at intensities

below

Is there any known risk with the current use of diagnostic

ultrasound?

Are there any bioeffeets that ultrasound produces in

small animals under experimental conditions?

Which of the following are mechanisms by which

ultrasound can produce bioeffects?

Which of the following end points is documented

well enough in the scientific literature to allow a

risk assessment for diagnostic ultrasound to be

based on it?

More than one epidemiologic study has shown a

statistically significant effect of ultrasound exposure

on which of the following end points?

Which of the following acoustic parameters has

(have) been documented in ultrasound epidemiologic

studies published thus far?

 A device commonly used to measure the ourput of

diagnostic ultrasound instruments is a(n)

A typical output intensity (SPTA)for an ultrasound

imaging instrument is

Which of the following typically has the highffi

output intensity?

There is no known risk with ultrasound imaging

as it is applied currently

As far as we know now, which of the following is

the most correct and informative response to a

patient's question. "Will this hurt me or my

baby?"

Minimize exposure time, Scan for medical indication( s) only, Minimize exposure intensity

To minimize whatever risk there may be with ultrasound

imaging, which of the following should be

done?

Which of the following controls affect instrument

output intensity?

Tissue anywhere in the Doppler beam is exposed

 to ultrasound, Tissue anywhere in the imaging plane is exposed

to ultrasound, Doppler intensities are higher than for continuous

wave fetal monitoring.

Which of the following are correct for a duplex,

pulsed wave Doppler instrument? 

The tissue of greatest concern regarding bioeffeets

in an abdominal scan is the

Would it be wise to substitute a duplex, pulsed

wave Doppler device for an inoperative fetal monitor for long-term (e.g., 24-hour) monitoring

in labor?

Which of the following is (are) likely to be exposed

to ultrasound during a diagnostic study?

No bioeffeets have been observed in nonhuman

mammalian tissues at thermal index values of less than

No bioeffecls have been observed in nonhuman

mammalian tissues at mechanical index values of

less than

No bioeffects have been observed in nonhuman

mammalian tissues at peak rarefactional pressure

values (megapascals) of less than