Lateral Knee X-ray and Rotation

Рет қаралды 82,695

13 жыл бұрын

Tips on how to determine if there is rotation on a lateral knee and if the proper tube angle has been applied, as well as how to correct positioning. For information on my new book, "Becoming a Radiologic Technologist" visit becomingaradiologictechnologis... - available in print and kindle editions! Subscribe for more videos like this: kzfaq.info...
Watch my most recent videos: / topicsinradiography
Check out my career exploration book, “Becoming a Radiologic Technologist” www.amazon.com/gp/product/147...
My name is Jeremy Enfinger, and I've been teaching for JRCERT-accredited Radiologic Technology programs since 2005. I work full-time in management now for a large hospital system in San Diego, while I continue to teach on an adjunct basis because, well, I simply love radiography!
_____________________________________________
SOCIAL
Follow the Facebook Page: / topicsin.radiography.3
Follow me on Twitter @5minRad: / 5minrad
Follow me on Instagram @5minRad: / 5minrad
Find me on LinkedIn / jeremyenfinger

Пікірлер: 52

@m.francis2774 8 ай бұрын

I can not thank you enough! Very informative! You answered every pressing question I had!

@Ryan-ir8kx 3 жыл бұрын

Excellent explanation and very practical advice!

@kooziimusik413 7 жыл бұрын

This video really helped me out a lot btw. Thank you!

@TopicsInRadiography 13 жыл бұрын

That's a great tip... I wish I could get all the tips I have heard and make some videos just on those - plenty of material there.

@TopicsInRadiography 12 жыл бұрын

Most people tend to under-rotate, rather than over-rotate due to limited mobility, lack of flexibility, not enough hip rotation, etc. You can also keep in mind (using your x-ray vision) that the knee is a hinge joint, so if you can visualize the hip, knee and ankle bending at one point-the knee, all three joints should be in the same plane - look for elevation of the knee compared to hip and ankle and try to make them parallel to the table. I hope this helps!

@Rainbow_1312 10 ай бұрын

Knee is more like Temporomandibular joint - it is a bicondylar joint. Whereas Elbow is more of "hinge" joint

@TopicsInRadiography 12 жыл бұрын

Thanks for the comment k24boy123... the superimposition I'm speaking of was referring to the posterior borders of the femoral condyles. In context, it's absolutely possible to acquire better superimposition, and we all know that the side up will be slightly larger as every radiograph will display some evidence of magnification. If any of my students are reading this, DON'T use the "eyeball" method. I'll grade you off for that! Also, no need to superimpose hips to get a good lateral knee.

@dwayneanthony2659 3 жыл бұрын

Good stuff!!!

@notyourmombrey 4 жыл бұрын

This was extremely helpful, thank you!

@TopicsInRadiography 4 жыл бұрын

glad it was helpful... did this one almost 10 years ago! horrible audio/video quality, LOL

@TopicsInRadiography 12 жыл бұрын

No problem... they can still be tricky because patient size can alter the appearance of the knee. If you bend down to look at the knee (once in a lateral position), you should see a small space between the patella and the table-top, so it's good that you're using the sponge to prevent over-rotation. To prevent under-rotation, I recommend using a sponge underneath the foot of the affected side. See additional comment...

@modernepic33 6 жыл бұрын

Wonderful video!! I would love to see one of rotation analysis for the oblique knee projections as well.

@amandao9869 12 жыл бұрын

amazing! in my year of clinical training, no one could explain how and why to correct things(well, hardly ever) Do u have more corrections i can watch like this? This is what you should write a book on. I'm about to start my first xray job:)

@Rainbow_1312 10 ай бұрын

good video

@kenho6175 12 жыл бұрын

Very helpful!! Thanks for that tutorial. Yeah 2 fingers underneath patella and 4degrees cephalic angle usually works for me. In horizontal ray lateral knee, x-ray beam enters from lateral end to medial end of the knee therefore slight angle downtilt is commonly used. However I still struggle with getting a good one, what I usually do is to slide a small sponge underneath the knee and use a straight tube perpendicular to the knee joint. Any tips??

@DoctorsHub 7 жыл бұрын

Knee x-ray! Thanka for sharing. I am a doctor andI love to watch and upload medical videos.

@abdulazizkhano..official5369 3 жыл бұрын

Good sir

@abdulazizkhano..official5369 3 жыл бұрын

Plz contact with me sir i am from pakistan watsapp no ....03129891395

@DoctorsHub 3 жыл бұрын

@@abdulazizkhano..official5369 Yes? What help do you need?

@adamboll3073 8 жыл бұрын

What if there is too much tube angle? I am in the latter park of my clinical externship and have my hands on every patient at this moment. However I work with many different techs that have their own strategies and techniques. There was a large gal, and I thought to put 10 degrees cephalid and it still showed the magnified medial condyle distally as shown in your insufficient tube angle pics. The tech thought it was TOO much angle and i repeated closer to 5 degrees. It was still about the same but maybe "slightly better" according to her. Can you help me with images or possiblities of too much tube angle? Thanks.

@TopicsInRadiography 12 жыл бұрын

@poncekid56 great tip!

@officialcompabrian4918 9 жыл бұрын

thank you, it may be more helpful if the angle between femur and leg 135 degree?

@TopicsInRadiography 9 жыл бұрын

Brian Ramirez Yes... this was an exposure of a phantom, so I did not have the ability to flex the knee. It would help with rotation though!

@tharaayahyaa7896 Жыл бұрын

If we want to see the ligament and tendons in the knee what to do ?

@TopicsInRadiography Жыл бұрын

X-rays are not the most ideal way to see ligaments and tendons. There are ways to perform soft tissue x-rays, but MRI would be the modality of choice to look at those.

@escaladegrises_radiologia 4 жыл бұрын

hello, somebody can tell me what is meaning of: OID . Thanks.

@TopicsInRadiography 4 жыл бұрын

Object to Image Distance

@m.francis2774 Ай бұрын

Hi Jeremy! Can you do a video on 30 60 90 patella views? We know to flex the knee at those different angles. It is necessary to angle the tube as well for the tangential projection, correct?

@TopicsInRadiography Ай бұрын

Can you clarify what you mean by "30 60 90 patella views"? Are you just talking about the amount of knee flexion, rotation, or something else? There are numerous ways to perform the tangential projection, but you must always angle the tube related to how much the knee is flexed.

@m.francis2774 Ай бұрын

Yes. The doctor wants the knee flexed in these different angles. The doctor just replied, "flex the knee OR angle the tube" when we asked what he wanted. Is there a way to keep the knee in a fixed position and angle the tube or the detector?

@m.francis2774 Ай бұрын

We have been acquiring 3 different images with the knee in 30 60 & 90° flexion. We're angling the tube as needed. Someone suggested angling the detector at those degrees.Do you think we could just angle the detector at 30 60 & 90° and achieve the same result?

@TopicsInRadiography Ай бұрын

@@m.francis2774 Regardless of how much flexion the knee is in, you'll need to have the x-ray tube near the foot to where the beam skims the proximal tibia and the CR is centered at the space between the tibia and patella.

@TopicsInRadiography Ай бұрын

@@m.francis2774 Angling the detector won't affect how much the joint space is open. You can always do that, but it will result in elongation.

@zakiaelshfea9988 3 жыл бұрын

Need more image evaluation

@TopicsInRadiography 3 жыл бұрын

At the moment, I am without access to my x-ray lab. I'm happy to critique any images that anyone would like to send me.

@theundertaker6582 5 жыл бұрын

I just wanna share this....Everytime I jump,ran and walk something is just happening on my knee.It feels like something just slides down and go back up....So can you tell me how to solve this problem of mine,or you can just tell me some tips on making my knee firm and strong

@TopicsInRadiography 4 жыл бұрын

Unfortunately, I'm not a medical doctor... I can tell you how to position and evaluate x-rays all year long, but it's beyond my scope to provide you with medical advice.

@kooziimusik413 7 жыл бұрын

Would flexing the knee or extending it open the patella more?

@TopicsInRadiography 7 жыл бұрын

In the lateral view, flexing/extending would not allow you to visualize between the femur and patella any more. Only rotating the knee would accomplish that if you are not in a true lateral position. Flexing/extending would only glide it inferior/superior.

@thevoiceharmonic 11 жыл бұрын

Sorry to tell you, but your phantom has been put together incorrectly. The lateral knee should have the head of the fibula showing clear of the tibia and part of this articulation showing. This becomes my only guide to correcting a failed lateral. Always an uptilt of about 5 degrees. Flex the knee and it will be easier to get the anatomy correctly orientated.

@osos231 4 жыл бұрын

That's incorrect. The fibular head should be slightly superimposed by the tibia. Showing a clear head means you're too externally rotated.

@johnblunk2012 26 күн бұрын

@@osos231 this is correct

@osos231 26 күн бұрын

@@johnblunk2012 What is??