Ultrasound frequency problem

In summary, ultrasound with a frequency of 4.25MHz can be used to produce images of the human body. The wavelength in the body can be calculated using the formula v= wavelength(f), where v is the speed of sound and f is the frequency. If the speed of sound in the body is the same as in salt water 1.50km/s, the wavelength in the body would be 3.53 x 10^-4 m.
  • #1
whitehorsey
192
0
1. Ultrasound with a frequency of 4.25MHz can be used to produce images of the human body. If the speed of sound in the body is the same as in salt water 1.50km/s, what is the wavelength in the body?



2. v= wavelength(f)
M = 10^6



3. v= wavelength(f)
wavelength = v/f
= .0015/4250000
= 3.53 x 10^-10 m
I'm not sure if this is right.
 
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  • #2


wavelength = v/f
= .0015/4250000
This step is wrong. 1.5km = ...m?
 
  • #3


rl.bhat said:
wavelength = v/f
= .0015/4250000
This step is wrong. 1.5km = ...m?

o sorry my mistake
um so it should be (1500/4250000) which equals 3.53 x 10^-4 m?
 
  • #4


That is right.
 
  • #5


rl.bhat said:
That is right.

thank you again! :]
 

1. What is ultrasound frequency and how is it measured?

Ultrasound frequency is the number of times per second that sound waves vibrate. It is measured in Hertz (Hz), with one Hz being equal to one vibration per second. In ultrasound imaging, frequencies typically range from 2 to 18 MHz.

2. Why is the frequency of ultrasound important in medical imaging?

The frequency of ultrasound is important because it determines the depth of tissue penetration and the resolution of the resulting image. Higher frequencies provide better resolution but have limited penetration, while lower frequencies have greater penetration but lower resolution.

3. How does the frequency of ultrasound affect the safety of the procedure?

The safety of ultrasound is not affected by the frequency used. Ultrasound uses non-ionizing radiation, which does not have enough energy to cause harm to cells. However, higher frequencies may generate more heat in tissues, so they are typically used for shorter periods of time.

4. What are the factors that determine the appropriate frequency for an ultrasound procedure?

The appropriate frequency for an ultrasound procedure depends on the depth of the structures being imaged, the type of tissue being imaged, and the desired resolution. Other factors, such as the size of the patient and the type of transducer being used, may also play a role in determining the frequency.

5. Can the frequency of ultrasound be adjusted during a procedure?

Yes, the frequency of ultrasound can be adjusted during a procedure. This allows for greater flexibility in imaging different structures and depths within the body. However, the frequency range may be limited by the capabilities of the ultrasound machine and the transducer being used.

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