Continuous vs Pulsed Wave Doppler Ultrasound | Ultrasound Course | Radiology Physics Course #21

High yield radiology physics past paper questions with video answers
Perfect for testing yourself prior to your radiology physics exam 👇
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Here we explore the benefits and drawbacks of both continuous and pulsed wave doppler ultrasound imaging. We discuss colour doppler, spectral doppler and power doppler. We will also discuss the maximum velocity measurements of pulsed wave doppler and how it relates to pulse repetition frequency, pulse repetition period and imaging depth. In the next talk we will discuss spectral waveforms.
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Not sure if the question banks are for you?
If you're here, you're likely studying for a radiology physics exam. I've spent the last few months collating past papers from multiple different countries selecting the most commonly asked questions. You'll be surprised how often questions repeat themselves!
The types of questions asked in FRCR, RANZCR AIT, ARRT, FC Rad Diag (SA), ABR qualifying Core Physics and MICR part 1 are surprisingly similar and the key concepts remain the same throughout. I've taken the most high-yield questions and answered them in video format so that I can take you through why certain answers are correct and others are not.
Happy studying,
Michael
#radiology #radres #FOAMrad #FOAMed

[@barack.obama.official]

I want to congratulate you on this incredible video lecture series and the service you are providing to students and professionals everywhere. In the coming years, our nation will continue to need educators like yourself that are keen seeing future generations prosper. Please continue this great work, as I join the American people in thanking you for making this world-class educational series free and accessible for everyone.

[@chickennugget3392]

What are you doing here Obama

[@joestevenson5568]

"Our nation" "The American people" The guy is clearly south african

[@masoodandalib8676]

HE deservers a lot of honour ,appreciation and thanks, but cant find words to pay tribute comparable to his qualities, sincerity and devotion.

[@BethelHealthBuilders]

Thank you for this clear and brilliant description of the various modes of doppler interrogation. You are an excellent and clear communicator. Kudos! Rick Gutierrez MD

[@m7mdmeedo]

Man, we love you . Thank you very much. ❤

[@nimaipatel4622]

Amazing video! As a first year cardiology fellow learning echo, this was immensely helpful! Thank you!

[@radiologytutorials]

Glad it was helpful!

[@davidecappelli9961]

Really brilliant! 👍

[@veaceslavanapislaru7310]

incredible explanation! thank you!

[@radiologytutorials]

Glad it helped!

[@parianegahdari5722]

Thanks to you we could had a perfect presentation for our medical physics class we love you ❤🎉

[@ramjoshi4019]

hats off sir, for your nice presentation

[@zahidaabdullah9404]

Great work!!!

[@radiologytutorials]

Thank you 🥰

[@mayavidhani7491]

Amazing teaching ❤

[@radiologytutorials]

Thank you Maya 🙂

[@masoodandalib8676]

I salute you and pray ALLAH to bless you with the best and also wish you to be honoured with noble prize in Radiology/Physics .....AMEEN

[@DreamTheaterTomi]

Many thx for your excellent talks. I may not understand the active region of color doppler. Outside of the box we have the general 2D picture by merging A-lines with short pulses and SPL. However, in the active region we have 2 poeces of information: A-lines in 2D-constellation and color. Color indicates as you mentioned the doppler shift. For me it is not clear that in this region we use two different pulse waves to have the 2 distinct values? Or a longer PRP enables both of them: 1) Time and intensity show us the A lines woth brightness? 2) The longer SPL allows to have the doppler shift value and position? Is this the solution or two different methods are running in parallel? Thank ypu inadvance, Tamas

[@kombatbakpen6820]

Hi sir, Your stated of Nyquist theorem (which read: We need to sample a returning doppler shift frequency at least twice within one wavelength). Coming from a signal processing background, I want to ask if that is the physical meaning of saying to reconstruct a signal you need to sample at least twice the sampling frequency.

[@BethelHealthBuilders]

Would it be correct to say that by having at least two return signals in a wave cycle, the wave function can be fitted (this is a sine wave) and thus the frequency and amplitude can be derived. That is how I can understand the Nyquist limit.

[@user-fj9sn5wd8f]

excellent teaching. please post more of MRI modules. need to prepare for exam

[@radiologytutorials]

Thank you. Just finished filming the next lecture now. Will edit, render and upload tomorrow 🙂

[@wolfymilk]

12:48 Why does increasing the SPL narrow the bandwidth?

[@mayavidhani7491]

Please post more lectures.

[@radiologytutorials]

Another video dropping tomorrow. The last of the ultrasound series!

[@roadtolifeismailibrahimabu5492]

Which application are using to record i want to share people with some case

[@radiologytutorials]

Hi 👋 I'm just using powerpoint to screen record

[@chazsison]

When is the MRI module❤😢?

[@radiologytutorials]

After ultrasound. Five more videos of ultrasound left. I’m on holiday this week so likely starting not this Monday but the next

[@leonsmith4130]

I can't understand the nyquist limit and how fmax=PRF/2

[@radiologytutorials]

It’s a difficult one. Next week I’m releasing an MRI video on aliasing (also using the Nyquist limit) and I’ve made much better illustrations. Hopefully I will be able to show how we need to sample a frequency at least twice per wavelength in order to accurately measure that frequency.

[@Q-Bits8]

huh? So is duplex equal to spectral doppler equal to pulse wave doppler equal to continuous wave doppler? Or can you clarify the terms in short sentences?: Power doppler, spectral doppler, color doppler, duplex, pulse wave doppler and continuous wave doppler?

[@joestevenson5568]

Spectral Doppler is continuous or pulse wave Doppler. Power Doppler is colour Doppler but without direction information

[@dacsaab5352]

Why aren't you posting more?

[@radiologytutorials]

I’ve posted 63 videos in 70 days… I’m currently on holiday this week. Still there will be 3 videos coming out this week. Back from holiday next Wednesday

[@davidmichaels329]

@@radiologytutorials Insane productivity. Currently studying for the US CORE exam and these videos are awesome. Thanks for making them!

[@radiologytutorials]

Thank you David 🙂👍🏼

[@dacsaab5352]

@@radiologytutorials right , maybe i m expecting it everyday , i guess couldn't get enough of it 😄