Evaluation of a fast pseudo-cinematic method for magnetic resonance imaging of the temporomandibular joint.
A pseudo-cinematic magnetic resonance imaging study of the temporomandibular joint (TMJ) was undertaken with the aim of reconciling image quality with the shortest possible examination time. Two receivers were compared, a surface coil and a circularly polarized head coil, and the latter was found to be superior. Using a gradient echo sequence, repetition time and flip angle were optimized by visual assessment of the images and by measuring the contrast-to-noise ratio. A mechanical device was used to control opening and closing. The technique has been used on a series of 75 subjects, 60 of whom had TMJ dysfunction. Total acquisition time was 7 min. The results confirmed that it is possible to obtain pseudo-cinematic TMJ images suitable for clinical diagnosis by optimizing the choice of receiver and capture parameters.
Laboratory of Magnetic Resonance Imaging in Biology and Medicine, Faculty of Medicine, University of Rennes, Tours, France.
J C
JC
Quemar
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S
Akoka
H
H
Romdane
J D
JD
de Certaines
D005069:Evaluation Studies as Topic; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D015588:Observer Variation; D012680:Sensitivity and Specificity; D013704:Temporomandibular Joint / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000175:diagnosis* / Q000503:physiopathology