0.3 and 1.5 Tesla Mri

Sometimes, if my daily agenda allows to spread my curiosity (time is never enough!), I make a comparison between 0.3 and 1.5 Tesla Mri imaging studying the same patient.

These are the pictures of a sprained medial collateral ligament of a professional football player, quite similar to what is shown in my recent post medial collateral ligament tear.


Coronal T2w (left) and Sagittal T2w (right) Mri scan (0.3 tesla)

I always complete my study with a dynamic ultrasound exam; in this patient the presence of a calcification is noted, not visible on Mri scans.


Comparison between Axial and Coronal Mri scans of the same patient.


Sagittal Pd Tse Fs (1.5 tesla) and Fast Stir (0.3 Tesla).

How Much is Enough?

Taking inspiration from an interesting paper – Advances in Musculoskeletal MRI – Technical Considerations – I was asking myself: how many Tesla are needed to make a correct diagnosis of knee pathology? Recent MRI technology developments have brought new powerful systems; some radiology departments start using 3 Tesla Mri imaging systems for knee exams. But what is the real added value on musculoskeletal imaging? Not considering special techniques like spectroscopy or molecular imaging, what can I see more than a dedicated system does not reveal? I often wondered if my report would change by scanning the same patient with a 3 Tesla Mri. Three days ago a man came to my department bringing a previous 3 Tesla Mri exam: what a nice chance to reveal if there was any difference! Take a look at the comparison between 0.3, 1.5 and 3 Tesla images of the same patient; history of patellar fracture, femoro-patellar chondropathy and posterior horn medial meniscus tear. High field Mri for knee evaluation: is it always needed?