Educational videos from Youtube: Ultrasound.

[Argirios Argiriou]

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[Argirios Argiriou]

Chronic Cystitis

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[Argirios Argiriou]

How to Measure Urinary Bladder and Prostate Volume (Demo For Residents)

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[Argirios Argiriou]

Ο Phil Perera που το παρουσιάζει είναι εγγύηση για την ποιότητα αυτού του βίντεο διάρκειας 7 λεπτών.

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[Argirios Argiriou]

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[Argirios Argiriou]

Ο Phil Perera που το παρουσιάζει είναι εγγύηση για την ποιότητα αυτού του βίντεο διάρκειας 5 λεπτών (βασικά το ζουμί είναι μέχρι το 4:33).


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[Argirios Argiriou]

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[Nina Kiriakidou]

Ο Phil Perera που το παρουσιάζει είναι εγγύηση για την ποιότητα αυτού του βίντεο διάρκειας 9 λεπτών

Τα πιο ενδιαφέροντα σημεία είναι στο 1:19 (the two main position of the probe for the examination of the gallblader)

στο 2:49 (the gallblader anatomy, σχηματοποιημένη)

στο 3:18 βλέπουμε ότι όταν βλέπουμε την χολή με τον υπέρηχο η εικόνα είναι αναποδογυρισμένη,

και στο 6:42 το Mickey Mouse Sign (Το πρόσωπο του Mickey Mouse είναι Vena Porta το δεξί του αυτί το Common Bile Duct και το αριστερό του αυτί η Hepatic Artery).

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[Argirios Argiriou]

Βιντεάκι διάρκειας 2,30 λεπτών. Οι εικόνες αρχίζουν από το 0:55 και μετά.

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[Argirios Argiriou]

Ποιοτικό βιντεάκι διάρκειας 4 λεπτών.

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[Argirios Argiriou]

Ποιοτικό βιντεάκι διάρκειας 3 λεπτών.

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Οι βασικές μου σημειώσεις από αυτό το βιντεάκι:

01:38 The closer to 90 degrees the reflection, the brighter the reflection is.

01:39 Optimal reflection = Bright
          Suboptimal reflection = Darker

01:53  Hyperechoic (white)
          Isoechoic
          Hypoechoic
          Anechoic      (black) (it is usually fluid)           

02:13

Those three can give bright reflections:

Stones
Bones
Air
 

[Argirios Argiriou]

Ποιοτικό βιντεάκι διάρκειας 5 λεπτών.

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00:10 Shadowing (i.e. black ribbon below, for example, gallstones). Can be divided to "Clean Shadow" which is black, below stones and bone, and "Dirty Shadow" which is grey, below airfilled structures).

02:00 Enhancement (i.e. brighter, deep to the fluid)

03:38 Edge Artifacts (i.e. on the edges of any kind of curved cystic structure)

04:29 An transverse urinary bladder with a folley where you see at the same time all the three artifacts together

[Argirios Argiriou]

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[Argirios Argiriou]

Δεν είναι ορατοί οι σύνδεσμοι (links). Εγγραφή ή Είσοδος

[Argirios Argiriou]

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Πολύ καλά κείμενα και βίντεο(s)

Μεταξύ άλλων:

Ultrasound Probe Movements:

1) Sliding

2) Tilting / Fanning

3) Rotation

4) Rocking

5) Compression


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Ultrasound buttons

Freeze

Measure (Calipers)

Store

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Power Doppler Mode

There is a mode similar to color Doppler that you may encounter called Power Doppler. This mode does not show up as red or blue on the screen but only uses a single yellow color signifying the amplitude of flow. So you can’t tell if the flow is going towards or away from the probe given that it has only one color. It is more sensitive than color Doppler and is used to detect low flow states such as venous flow in the thyroid or testicles.

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Pulse Wave (PW) Doppler Mode

Pulse Wave (PW) Doppler allows you to measure the velocity of blood flow (at a single point). A unique aspect of Pulse Wave Doppler is that you can specify to the ultrasound machine exactly where you would like the machine to measure the velocity using the Sample Gate. It’s usually seen by two horizontal lines along your cursor. you can move your cursor and your sample gate and place it exactly where you want to measure your blood velocity.

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Continuous Wave (CW) Doppler Mode

Continuous Wave Doppler is very similar to pulse wave Doppler except it does not alias and can detect very high velocities (greater than 1000cm/second). So Continuous Wave Doppler is the optimal choice for measuring high-velocity applications such as valvular stenosis and regurgitation.

Unlike Pulse Wave Doppler which has a sampling gate to measure a single point along your cursor, Continuous Wave Doppler measures all points along your cursor. Therefore what you will see will be the maximum velocity of flow detected along the cursor line. This is a pro and a con. It is a pro because you don’t have aliasing and can detect high velocities, but it is a con because you don’t know exactly where that velocity is coming from on the cursor. Also if there are two velocities along the cursor line, you won’t be able to differentiate the lower velocity compared to the higher velocity signal, since the high-velocity signal will mask the low-velocity one.

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Tissue Doppler Imaging (TDI) Mode

Now let’s go over how to use Tissue Doppler.

The good news is that all of the principles of Pulse Wave Doppler also apply to Tissue Doppler. In fact, Tissue Doppler is just another form of Pulse Wave Doppler that allows you to measure the much slower speeds of tissue/muscle movement (from 1cm/s – 20cm/s) compared to Pulse Wave Doppler that measures the much faster speed of blood (30cm/s – 200cm/s).

Accessing the Tissue Doppler function will vary by machine but usually just involves pushing a knob/button labeled “TDI” (Tissue Doppler Imaging) while you are in the Pulse Wave Doppler mode.

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Other Ultrasound Doppler Settings: Wall Filter, Steer, Angle Correction

When you are in one of these Doppler settings, you will be able to optimize your image further by adjusting the following ultrasound buttons/knobs:

Wall Filter: decreases low-velocity signals. Used to minimize the amount of artifacts on your Doppler images

Steer: allows you to steer the color Doppler box when you can’t get an optimal angle

Angle Correction: used for Pulse wave to correct the angle of your sample gate when you can’t get an optimal angle