Evaluation of a fast pseudo-cinematic method for magnetic resonance imaging of the temporomandibular joint
| Autor: | J. D. de Certaines, S. Akoka, H. Romdane, J. C. Quemar |
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| Rok vydání: | 1993 |
| Předmět: |
medicine.medical_specialty
Materials science Image quality Sensitivity and Specificity stomatognathic system Flip angle medicine Image Processing Computer-Assisted Humans Radiology Nuclear Medicine and imaging Closing (morphology) General Dentistry Observer Variation medicine.diagnostic_test Temporomandibular Joint Tmj dysfunction Magnetic resonance imaging General Medicine Temporomandibular Joint Disorders Magnetic Resonance Imaging Surgery Temporomandibular joint medicine.anatomical_structure Otorhinolaryngology Electromagnetic coil Evaluation Studies as Topic Acquisition time Biomedical engineering |
| Zdroj: | Dento maxillo facial radiology. 22(2) |
| ISSN: | 0250-832X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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