Echocardiograms are used by doctors and sonographers to investigate how well a p

Question

Echocardiograms are used by doctors and sonographers to investigate how well a patient's heart is working. The structure of the heart can be observed using ultrasound, while the blood flow can be measured with doppler imaging. Use what you learnt about waves and ultrasound to state whether the following statements are True or False.

Note: As each statement only has two possible answers - true or false

heres are four statement:

To see small structures in the heart, long wavelength ultrasound waves (not ones with a short wavelength) should be use

Sonographers can work out the velocity of blood in the heart when told the intensity of the source of ultrasounds and the intensity of the echo (reflection). They do not need additional information. true or false

The ultrasound waves are reflected from the heart as the heart has a different density (and hence refractive index) to the surrounding tissue.

To see small structures in the heart, ultrasound waves with a high frequency, rather than a low frequency, should be used true or false

Echocardiograms are used by doctors and sonographers to investigate how well a patient's heart is working. The structure of the heart can be observed using ultrasound, while the blood flow can be measured with doppler imaging. Use what you learnt about waves and ultrasound to state whether the following statements are True or False.

Note: As each statement only has two possible answers - true or false

heres are four statement:

To see small structures in the heart, long wavelength ultrasound waves (not ones with a short wavelength) should be use

Sonographers can work out the velocity of blood in the heart when told the intensity of the source of ultrasounds and the intensity of the echo (reflection). They do not need additional information. true or false

The ultrasound waves are reflected from the heart as the heart has a different density (and hence refractive index) to the surrounding tissue.

To see small structures in the heart, ultrasound waves with a high frequency, rather than a low frequency, should be used true or false

Explanation / Answer

1--> false as short wavelength or high frequency wave is used to see fine details because shorter the wavelengh higher will be reflection from denser surface hence more detailed image

2-->false as this is based on dopplers effect and he can calculate frequency from intensity but cant calculate velocity of ultrasound. Here 2 values are known and 2 are unknown hence it is not possible for him to calculate velocity untill he gets the velocity of wave. He also needs the direction of flow of blood whether it is toward the wave or away from the wave

3-->true as wave gets reflected from heart but penetrate the tissues surrounding heart like skin muscles etc.

4--> true as explained in first part

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