ΠΦΥ -Εκπαίδευση > Αποσπάσματα από τον έντυπο & ηλεκτρονικό τύπο
Educational videos from Youtube: Ultrasound.
Argirios Argiriou:
Ποιοτικό βιντεάκι διάρκειας 3 λεπτών.
Δεν είναι ορατοί οι σύνδεσμοι (links).
Εγγραφή ή Είσοδος
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.
Δεν είναι ορατοί οι σύνδεσμοι (links).
Εγγραφή ή Είσοδος
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:
Δεν είναι ορατοί οι σύνδεσμοι (links).
Εγγραφή ή Είσοδος
Argirios Argiriou:
Δεν είναι ορατοί οι σύνδεσμοι (links).
Εγγραφή ή Είσοδος
Argirios Argiriou:
Δεν είναι ορατοί οι σύνδεσμοι (links).
Εγγραφή ή Είσοδος
Πολύ καλά κείμενα και βίντεο(s)
Μεταξύ άλλων:
Ultrasound Probe Movements:
1) Sliding
2) Tilting / Fanning
3) Rotation
4) Rocking
5) Compression
ή
Ultrasound buttons
Freeze
Measure (Calipers)
Store
ή
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.
ή
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.
ή
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.
ή
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.
ή
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
Πλοήγηση
[0] Λίστα μηνυμάτων
[#] Επόμενη σελίδα
Μετάβαση στην πλήρη έκδοση