Chison Q9 Doppler and M-Mode: Ultrasound Training Series Part 3
November 19, 2014 by Brian Gill
Doppler and M-Mode on the Chison Q9 Ultrasound Machine: Training Part 3 of 7
The Q9 has PW, CW, Color, and Power Doppler. For M-Mode, there is standard and “steered” or anatomical M-Mode.
Part 3 of the Q9 training video series will teach you how to use these features of the Chison Q9 Portable shared service ultrasound machine.
Links to all parts of the series can be found below the video. Links will be updated as the videos are posted.
Part 1: Chison Q9 System Introduction & Overview
Part 2: 2D Imaging & Optimization
Part 3: Doppler & M-Mode
Part 4: Measurements & Annotations
Part 5: Review & Save Images
Part 6: Exam Review & Export
Part 7: System Customization
Bonus Chapter: 4D Imaging on the Chison Q9
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Transcript to Doppler and M-Mode training on the Chison Q9 portable color Doppler ultrasound machine.
For M-Mode and Doppler modes, as we discussed in the first movie, the way to get into any of these Doppler modes or M-Mode are right through here.
For M-Mode, we’re just going to simply push this down and get our M-line. You can optimize this here by using your color map or just changing the sweep speed. The higher the number, the slower the sweep speed. The lower the number, the faster the sweep speed. You can change your display format and the layout.
And there is an option for steered M-Mode, and that is used with the phased array probe only. If you have a phased array probe and you want to use steered M-Mode, you would use this angle to twist the direction, to steer that anatomical M-Mode cursor. So now, I can push M-Mode again to get to a full-screen M-Mode screen.
Push it again to go back to 2D, and I’m all set. Alternatively, if you’re in the M-Mode and you want to go back to 2D, simply click B, and you’re back into the V-Mode or 2D mode. Now for color Doppler, very similar, you’re going to push down the C button.
Here, you’re going to get your region of interest box. You use the trackball to move the position. And notice down here, we have some things that will change as I move along. If I go back to B-Mode, it goes away. When I hit C, this trackball says to move ROI. So I can use that to move the region of interest box to get where it is that I want to go to get to scan. Now if I want to change what that says, I’m going to hit the Enter key, and now, it says change ROI. So I can change the size of the region of interest box now.
Hit Enter again, and I can move it. It says, see menu. If it Change here, I’m going to get that same menu I got if I push this menu here. So now, I have the B menu. I hit change again, and now, it’s the color Doppler menu, where I can make changes in secondary image optimizations for what it is that I’m scanning. If I want to change the gain, I can use this color button, the C, to adjust the gain of that.
And I can use this steer to change the angle of my sample box. Now I have the image optimizations down here, where I can change the frequency of the Doppler. I can also use the steer to change this. Instead of this steer, I’ve got another steer down here.
Wall filter, my color maps, pulse repetition frequency, color invert, persistence, line density. Line density will, at a higher level, give you a better image quality, but at the cost of frame rate. So if you want faster frame rates, you’re going to want to use a low line density. And your baseline down here, you can change where your baseline is on the color scale. Press B-Mode to go back to just general 2D. Now for power Doppler, Color Power Angio, same thing, you’re going to push that here.
You’re going to press Menu and move that to change between power Doppler and directional power Doppler. And you notice how your scale changes here. The directional power Doppler is going to show the direction of blood flow. Click it again, and I’ve just got my regular power Doppler there. For pulse wave Doppler, we’ll do just like we did anything else, we’re going to push down the PW.
We get our image gate here. Here, we can use the steer to adjust the position of the gate and the angle of the gate. You can also use this angle to do the angle correction. You can use the trackball to move it around. And if you want to change your gate size, you can hit the Enter key and adjust the size of your gate. Hit Enter again. So when I want to go to live, I click Update.
[PULSE WAVE SOUNDS] And here’s where I’d make my adjustments. We’ll click on Invert, and I can adjust my baseline again. Now this is just a single mode. If we want to go to triplex, we have to hit Freeze again. Go to our PW, and here, we’ve got triplex. We’re going to go ahead and click that on. And this is going to give me the color, if I have a color box, but right now, it’s going to give me duplex Doppler.
If I had color, it will turn on the triplex as well. But right now, if I want to get the live 2D and pulse wave, this is how I would do it. Click Update. [PULSE WAVE SOUNDS] If I wanted to add color, I’d go back to that color. Now if we went to CW Doppler, it’d be very much the same. You would have the range gate to show on the soft keys. You would also have your ECG, where you could show it on and off and invert. And the velocity, as we showed, in that sub-menu down below, earlier in the movie.