This can be typically adjusted on the machine, but traditionally red means there is movement towards the probe which means the wavelength is becomes shorter than the original wavelength. Blue means that there is movement away from the probe and the wavelength is longer that the original wavelength. You can check this on your ultrasound machine by looking at the color scale when you turn on color doppler. This will reflect the color and direction of flow.
Yep! "The increased flow sensitivity and better vascular detailing of power Doppler have been used to detect flow presence and characteristics in vessels that are poorly imaged with conventional color Doppler. " pubmed.ncbi.nlm.nih.gov/9652513/
This a term "BART" - Blue Away and Red Towards that indicates which way a particular object is moving in relation to the ultrasound probe when using color doppler. In the example in this video the probe is located on the exact same spot of a patient but is only angled differently. In the first clip at 2:59 you see that the aorta is visualized but the probe is angled inferiorly. Due to this blood is moving "away" from the probe and will show up as blue on the image. In the 2nd clip beginning at 4:58 the probe is angled towards the head of the patient. The probe is left in the exact same position but because it is directed towards the head blood traveling through the aorta is coming "towards" the probe and will be read on the image.
Many thanks for the clear explanation regarding colour coding of the doppler signal.
I’m so glad I found this channel!!! Thank you!!
Thank you very much. Got basic orientation and my foundation for USG
Very beneficial, thank you !
I thought red wavelengths have a lower frequency and blue light has a higher frequency?
This can be typically adjusted on the machine, but traditionally red means there is movement towards the probe which means the wavelength is becomes shorter than the original wavelength. Blue means that there is movement away from the probe and the wavelength is longer that the original wavelength.
You can check this on your ultrasound machine by looking at the color scale when you turn on color doppler. This will reflect the color and direction of flow.
If they were to ask you whats the main function of power doppler would you answer to detect the presence of flow ?
Yep!
"The increased flow sensitivity and better vascular detailing of power Doppler have been used to detect flow presence and characteristics in vessels that are poorly imaged with conventional color Doppler. " pubmed.ncbi.nlm.nih.gov/9652513/
Thanks for your lecture
Awesome. Thank you sir!
Awesome 👏
what does it mean by color blue away and red towards... can sort an example sir
This a term "BART" - Blue Away and Red Towards that indicates which way a particular object is moving in relation to the ultrasound probe when using color doppler.
In the example in this video the probe is located on the exact same spot of a patient but is only angled differently. In the first clip at 2:59 you see that the aorta is visualized but the probe is angled inferiorly. Due to this blood is moving "away" from the probe and will show up as blue on the image.
In the 2nd clip beginning at 4:58 the probe is angled towards the head of the patient. The probe is left in the exact same position but because it is directed towards the head blood traveling through the aorta is coming "towards" the probe and will be read on the image.
Simply you can consider the blood going away from the probe is blue and the blood coming towards the probe is red.
Duplex scanning explain plz sir