is ultrasound technology cheaper compared to x-ray technology?
is it easier to construct?
for example the ones to probe foetus in pregnant females.
what is the advantage for using ultrasound for probing foetus compared to x-ray, apart from safety issue?
thanks.
Ultrasound reflected from an oncoming bloodstream that is moving at a 30 cm/s is mixed with the original frequency of 2.5 MHz to produce beats. What is the beat frequency in Hz? (Velocity of sound in blood = 1540 m/s.)
The smallest object which can be resolved with a given frequency of ultrasound in a diagnostic scanner is on the order of the wavelength of ultrasound used. If 20 mhz ultrasound is used for a scan of the eye, and the speed oft the wave is 1500 m/sec, how small an object could be detected in the...
hey just wondering about the doppler effect and how it is used in meterology, law enforcment and astronomy.
I know for law enforcment they use it in radar guns, and astronomy i think for finding the distance of planets?
Any other ways it used? and also how is ultra sound used in medicine...
Ultrasound reflected from an oncoming bloodstream that is moving at 31 cm/s is mixed with the original frequency of 1.3 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.)
I know that there are two doppler shifts; one where the source is fixed and the...