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ΕίσοδοςM-mode = For example for fetal heart tones
There are several modes of ultrasound: A mode, B mode, C mode, M mode, Doppler mode and so on.
M-mode ultrasound (also called motion-mode imaging) does not yield full frame images per se, but rather one selected image line is rendered as a function of time. This is used for displaying motion
of, for example, the periodic movement of heart valves. Any abnormalities or temporal variations can be directly seen as an image on the screen.
PW = Doppler mode
CF = Colour Flow ( shows directional flow )
PDI = Just shows flow (in general )
Power Doppler imaging (PDI) is a newly introduced ultrasound method which visualizes the integrated power of the Doppler signal instead of its frequency shift.
We compared this technique with the conventional color flow Doppler (CFD) in the examination of extracranial vertebral arteries.
B-mode = Brightness mode (gray scale ). Currently the most common form of ultrasound imaging. Solid areas appear white and fluid areas appear black. 1:51
Gain = "Brigthness". If you want want brighter picture you increase the Gain. If you want darker picture you decrease the gain.
You turn the button to the left or to the right to decrease or increase the Gain.
TGC From left to right and from Ut to Down: Left and Up must be narrowest while Right and Down broadest 2:51
If the ultrasound image was formed directly by the raw returned echoes, image would appear lighter in superficial layers and darker in deep layers but TGC is used to overcome this artifact.
Depth 3:09
Imaging depth does exactly what it sounds like - it describes how far into the body you can look with your ultrasound machine.
It is measured in centimeters and starts at the surface of the transducer, which is usually resting on the patient's skin.
Notch of the Probe It is typically to the patients right 3:58
Freeze 5:26
Automatic Depth 6:40
3D/4D I don't need it
Measure (= Calliper) 8:00
zoom 8:24
In the ultrasound display image, users, such as sonographers or doctors, use the zoom function to observe a specific area in more detail. However, the zoom function enlarges the
corresponding area image using some simple algorithms, such as linear interpolation. The zoomed image quality is usually quite poor and blurry.
Body Pattern Ellipse Shows where you are in the body in order to orientate other doctors 8:26
Clear 9:10
LOGIQView For long pictures like fetal spine. Not used so often 9:28
Choose Probe 11:30
Frequency We use it often Resolution vs Depth 11:58
Increasing the frequency is a good way to improve the resolution of your image, and decreasing the frequency will help you if you’re struggling to reach deeper structures.
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ΕίσοδοςFocus 12:18
The focus function allows the user to adjust the level of the focus of the ultrasound beam onto different structures during real time scanning.
For example, if you were performing a scan of the abdominal aorta then make sure that the focus is at the level of the aorta in the image.
Image quality at the level of the focus is the sharpest.
Angle For example to give the rigth angle to the Colour Flow according to the vessel"s orientation in order to visualise the vessel better 12:30
Dynamic Range 13:28
How to utilize the basic buttons on a duplex ultrasound machine
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Θέμα: Educational videos from Youtube: Ultrasound. (Αναγνώστηκε 167841 φορές)
27 Αυγούστου 2009, 12:17:46