I'm an MRI tech too (32 years) and you're absolutely right. I've scanned high school kids an hour after injury and you can see an ACL tear easily. I don't know where this wait until the swelling goes down stuff comes from. I know that they do it, but it's not because they can't see an ACL tear. It's by far the easiest knee injury to see on an MRI
Not to butt in, but it appears
@SWFLHurricane makes a compelling case. I’m only butting in b/c one of my homies was diagnosed w/ an ACL tear when the swelling was at its optimal level, & it turns out, he had a severe knee sprain upon a second look.
Came across a Q&A w/ an orthopedic surgeon via docpanel.com & this is what she stated:
[DocPanel] What are some common pitfalls in reading a knee MRI and diagnosing ACL injuries?
[Dr. Mehta]
“Common pitfalls in diagnosing ACL tears can be related to suboptimal positioning of your knee during your exam due to considerable swelling and pain, or technical issues with the MRI scanner. Typically, a 1.5 or 3.0 Tesla scanner is preferred.
Additional factors that make it difficult to diagnose an ACL tear are:
scarring of the ligament if the MRI is performed too long after an injury
blood surrounding the ACL
pre-existing degeneration of the ligament
These circumstances make it challenging to accurately interpret a knee MRI. It’s where experience really comes into play. Because general radiologists aren’t getting exposure to different presentations of musculoskeletal injuries and conditions - they do not have the familiarity required to identify these factors, which can lead to an inaccurate reading.”
So it appears that all of u guys r right, but I can definitely see the benefits of a second examination after the swelling has gone down to confirm the first reading. Now, it makes sense why these athletes are constantly getting a 2nd opinion a few days later.