If a user observes gallstones using

If a user observes gallstones using the B-mode, how about the sonographic features are behind a very bright edge.


Shadow
Many bright dots
Bright (hyperechoic)
Randomized gray pattern


Q2
The following techniques describe EUS imaging based on the B-mode. What technique does NOT have a relationship with the B-mode?

THE: Tissue Harmonic Echo
Elastography
CHE: Contrast Harmonic Echo
PWD: Pulse Wave Doppler
None of above


Q3
Please select the 2 ADVANTAGES of using the Color Doppler display mode.

Cancer can be easily detected
Lymph node can be easily detected
Blood flow direction and velocity can be detected
The overall diagnosis rate can be improved because of the high-resolution color image
Blood vessel can be easily detected


Q4
Doppler is very useful for detecting moving objects. What moving object needs to be detected during the EUS procedure?

Food
Blood
Lymph
Muscle


Q5
What is the function of the microbubble in the US contrast medium?

Harmonic Echo generation
Ultrasound reflection
Drug delivery
Flow activation


Q6
If a physician wants to confirm the relative tissue stiffness, which mode should be used after B-mode observation?

Color Doppler
Power Doppler
Contrast Harmonic Echo
Elastography
Pulse Wave Doppler


Q7
If a physician wants to measure blood flow velocities at specific locations, which mode should be used after B-mode observation?

Color Doppler
Power Doppler
Contrast Harmonic Echo
Elastography
Pulse Wave Doppler


Q8
Due to _______________________, the B-mode can display different degrees of brightness for different tissue layers.

Different component in different layers
Different temperature of different layers
Different thickness of different layers
Different amount of the fluorescence substance in different layers
Different amount of the blood vessel in different layers


Q9
What is the DISADVANTAGE of THE compared with the B-mode?

Reduced penetration
Reduced resolution
Increased noise
None


Q10
Please select the INCORRECT description about the US display modes.

In fundamental B-mode, tissues can be distinguished according to differences between black and white.
B-mode images of different tissue types with different echoes.
M-mode imaging is especially useful in EUS.
The Doppler effect is a physical phenomenon. It is used for principles of Doppler imaging.


Q11
The ability of elastography to distinguish between soft and hard tissues is based on the the phenomenon of _______________.

Different distortion rate of the ultrasound wave from tissue with different stiffness
Different loudness of echoes reflected from tissue with different stiffness
Different moving speed of tissue with different stiffness
Different compression rate of tissue changes the reflection of ultrasound waves


Q12
What color display in harder area by using elastography?

Black
Blue
Red
White
Yellow


Q13
Current US contrast agents are composed of a microsphere. What is the component inside the shell?

Metal powder that is not harmful to human
Liquid drug
Gas
Vacuum state
Special oil


Q14
How can contrast harmonic echo improve the diagnosis?

Use of the CHE can help differentiate different types of cancers according to tissue hardness.
Use of the CHE can help differentiate different types of cancers according to their microvasculature patterns.
Use of the CHE can help differentiate different types of cancers according to invasion layer.
Use of the CHE can help differentiate different types of cancers by tissue density.


Q15
What is the sonograhic feature of liquids such as bile in the gallbladder?

No US image
Dark (anechoic)
Varying shade of dark gray depending on organ water content (hypoechoic)
Bright (hyperechoic)
Shadow behind a very bright signal