Diagnostic performance of low field MRI in acute knee injuries.
The diagnostic performance of low field (0.1 T) magnetic resonance imaging (MRI) was studied prospectively and double-blindly among 33 patients with acute knee injuries. The subsequent arthroscopy was the golden standard. For lesions of the medial meniscus low field MR had a sensitivity of 88% and a specificity of 80%; for lesions of the lateral meniscus the sensitivity was 25% and the specificity 97%. For anterior cruciate ligament tears, low field MRI had a sensitivity of 83% and a specificity of 85%. The specificity for posterior cruciate ligament tears was 97%. The performance of low field MRI equalled that reported earlier for high field MRI, the only exception being the sensitivity for lateral meniscus lesions.
Kinnunen
J
J
Division of Diagnostic Radiology, Töölö Hospital, Helsinki, Finland.
Bondestam
S
S
Kivioja
A
A
Ahovuo
J
J
Toivakka
S K
SK
Tulikoura
I
I
Karjalainen
T
T
D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D001182:Arthroscopy; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis*; D007719:Knee Joint / Q000473:pathology; D008023:Ligaments, Articular; D008279:Magnetic Resonance Imaging; D008297:Male; D008592:Menisci, Tibial / Q000473:pathology; D008875:Middle Aged; D011446:Prospective Studies; D012680:Sensitivity and Specificity