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In an abdominal ultrasound, why is it important to visualize the common bile duct?

A. Because small stones will gather here
Because it shows that the patient has fasted
C. To show that it was not removed during the operation

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The frequency of ultrasound used for medical diagnosis is about

A. 2-20Hz
B. 2-20KHz
C. 2-20MHz

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In an early pregnancy of approximately 6 weeks, fetal age can be estimated by measuring

A. a) From nose to tail.
B. b) From crown to rump.
C. c) Width of head.

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In an inversion recovery T1-weighted image, tissues with short, medium, and long T1 relaxation times will have low T1 contrast between each other when TI is:

A. ) short, around 10 milliseconds.
B. ) long, around 3 seconds.
C. ) both A and B.

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The diagnosis of lung tumours with CT imaging methods is routinely used due to:

A. a) the small difference in density between the lungs and the tumours
B. b) the large contrast between low density, air-filled lung tissue and solid lung tumour masses
C. c) the absence of other imaging modalities to diagnose tumours

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In an abdominal ultrasound, why is it important to visualize the common bile duct?

A. Because small stones will gather here Because it shows that the patient has fasted C. To show that it was not removed during the operation

The frequency of ultrasound used for medical diagnosis is about

In an early pregnancy of approximately 6 weeks, fetal age can be estimated by measuring

In an inversion recovery T1-weighted image, tissues with short, medium, and long T1 relaxation times will have low T1 contrast between each other when TI is:

The diagnosis of lung tumours with CT imaging methods is routinely used due to:

A. Because small stones will gather here
Because it shows that the patient has fasted
C. To show that it was not removed during the operation