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.
Division of Diagnostic Radiology, Töölö Hospital, Helsinki, Finland.
J
J
Kinnunen
S
S
Bondestam
A
A
Kivioja
J
J
Ahovuo
S K
SK
Toivakka
I
I
Tulikoura
T
T
Karjalainen
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