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epic > knobology > Flashcards

knobology Flashcards

1
Q

How does SonoCT help?

A

It gives increased margin definition enabling you to see behind lesions, gets rid of edge shadow, reducing angle artifacts ,and speckle noise.

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2
Q

Why does SonoCt not work with color?

A

There are less lines of sight so you much turn up your gain when you use color.

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3
Q

How does elevation Compounding help?

A

It enhances contrast resolution reduces overall noise. It does this by taking multiple planes together to make one display plane.

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4
Q

Why should you use Xres?

A

It has no optimization consequence gets rid of haze by allowing significant artifact and target enhancement. Use and leave on!!!
(fetal kidney margins)

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5
Q

Why should you always use SonoCT and Xres?

A

Reinforced tissue details, enhanced margins and borders decreased artifacts and increased information. (muscle borders)

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6
Q

For 2d optimization why should you use Auto scan?

A

It continuously optimizes the 2d image brightness at the default gain and TGC, and you don’t have to keep hitting the Iscan.

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7
Q

In 2D OPT what three settings do you have and how should you use them?

A

Gen: Average, 3
Res: Resolution 1, 2 superficial
Pen: Penetration 4,5 Deep

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8
Q

What happens when you adjust Dynamic Range?

A

It is a trade off between temporal and spatial resolution, the higher the DR the more shades of gray , the lower the DR the less the shades of gray

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9
Q

So when would you want to increase the Dynamic Range?

A

For the liver and kidneys

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10
Q

So when would you want to decrease the Dynamic Range?

A

For black and white Like Nuchal Translucency

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11
Q

What is the trade off by using tissue harmonic imaging?

A

You lose penetration

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12
Q

Why use tissue Harmonic imaging?

A

It cleans up cystic structures

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13
Q

When could Harmonic imaging be detrimental?

A

In the GB you could miss sludge or the NT if it is really deep

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14
Q

How would you make a color Doppler image of the ovaries optimal?

A

use freq. opt flow, opt wall filter, all on low

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15
Q

What does the persistence on color flow do?

A

Its on pg 2 and it delays color to fill in.

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16
Q

At 20 weeks what should you adjust to get great fetal kidneys?

A

Adjust the XRES to 2

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17
Q

What EPIC post processing features are there?

A

Adjustable gain and Dynamic Range

Auto scan in the 2d real time and you won’t ever have to

18
Q

Output power settings are?

A 
TIS= Thermal Index Soft tissue
TIB= Thermal Index Bone
TIC= thermal Index Cranium
19
Q

On a venous exam what should you try to keep out of the ROI box?

A

The artery

20
Q

Describe a dominant vessel.

A

The one with the most flow. (its not neccesarily the largest) you should elongate enough to detect the flow orientation, and go far away from branching to achieve the most accurate angle

21
Q

What is AFT in color Doppler?

A

The cruise control for Doppler (use it)

22
Q

What do you do if you have lack of penetration?

A

Select the right TPS, select pen, check focal zone, press iscan increase power or gain(knob), and adjust TGC (sliders)

23
Q

What do you do if you have poor resolution?

A

press Iscan, decrease image width, increase focal zone and persistence( to smooth out the image), press harmonics, select RES if penetration isn’t an issue

24
Q

What do you do if an image is too soft hazy or gray?

A

Press Iscan, decrease 2d gain compression and persistence, move TGC to the left to decrease gain, change the grayscale map and press harmonics.

25
Q

How do you get faster frame rates?

A

Decrease field of view ,persistence, and focal range, use a smaller image width use HD zoom, Press 2D PRF to increase frame Rate, utilize cine loop

26
Q

What do you do if an image is too contrasty or grainy?

A

Press Iscan change the gray map, increase compression, increase persistance and adjust harmonic to HRes if penetration isn’t an issue

27
Q

What can you do if you can’t see the soft tissue?

A

Reposition the transducer window, press I scan, increase gain persistence and output power, adjust compression, press harmonics and select best 2d OPT. adjust smoothing setting, Press Chroma to improve contrast resolution

28
Q

What four image quality improvements are evident when using SonoCT?

A

tissue detail, enhanced borders and margins, decreased artifacts, increased information

29
Q

What two image quality improvements are evident when using harmonics?

A

Reduced image artifacts and increased resolution

30
Q

What happens to penetration when using harmonics?

A

Penetration is usually decreased as the frequency is increased

31
Q

Why should you begin and exam with the pots centered?

A

Gain can be selectively applied, the TGC is setup for each TSP setting, Centered is optimal Smart TGC allows a calibration between TGC amd TSP

32
Q

What three parameters automatically optimize when utilizing iscan?

A

Overall gain, TGC, and compression

33
Q

How does decreasing the wall filter help with low flow rates?

A

Allows you to see low level flow. if the wall filter is high you can get errounouls giving no flow

34
Q

To see low flow states in the ovary or thyroid what should you do?

A

increase the write priority to apply more color to the low-level echoes. (move the green bar up)

35
Q

What happens if the write priority is too low?

A

No color signal will be appreciated

36
Q

Can you change the write priority on a frozen image?

A

Remember echo write priority is a post processing function. You can change it while live or frozen

37
Q

What could you do to make the color persist in LE veins or other low flow vessels?

A

Set the persistence on Med ot High. This will give you the opportunity to augment, ect. Then freeze and have the color remain in the vessel.

38
Q

Can you think of an instance where variance could be useful?

A

Stenotic areas in fetal vessels, renal arteries, LE arteries, Carotid Arteries, Anywhere there is turbulent

39
Q

What five parameters does the flow opt button change? why is it a time saver?

A

Gain, PRF, Wall Filter, Baseline, Scale

40
Q

What is the difference between CPA or DCPA?

A

DCPA adds directional informationto the amplitude data. CPA only provides the amplitude data.

41
Q

When would you use color Doppler and not CPA or DCPA?

A

When you need velocity info. only the color Doppler provides velocity averages.

epic (1 decks)

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