Pseudodynamic imaging of the temporomandibular joint: SE versus GE sequences

Journal Article · Wed May 01 04:00:00 EDT 1996 · Journal of Computer Assisted Tomography

DOI:https://doi.org/10.1097/00004728-199605000-00025· OSTI ID:457554

Masui, Takayuki; Isoda, Haruo; Mochizuki, Takao ^[1]

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1. Hamamatsu Univ. School of Medicine, Hamamatsu City (Japan); and others

Pseudodynamic MR imaging of the temporomandibular joints (TMJs) has been used for the evaluation of the functional aspects of the TMJs. To evaluate the value of T1-weighted spin-echo (SE) and gradient-echo (GE) techniques, both techniques were performed in 9 asymptomatic (mean 25.7 years, 22-32 years), and 25 symptomatic (mean 44.9 years, 20-71 years) subjects with signs and symptoms of internal derangement or osteoarthrosis of the TMJs. The imaging time for the SE (180 ms / 15 ms / 110{degrees} repetition time / echo time /flip angle) and GE (fast low angle shot; FLASH, 90 ms / 12 ms / 40{degrees}) sequences was 27 and 28 s, respectively. In asymptomatic and symptomatic subjects, the confidence of the identification of the meniscal position was better on SE than GE images (3.6 {+-} 0.6 vs. 2.9 {+-} 0.9, p < 0.01, 3.2 {+-} 0.8 vs. 2.8 {+-} 0.8, p < 0.05), respectively and the sizes of the menisci were bigger on SE than GE images. The delineation of the condylar cortex was better on GE than SE images. For pseudodynamic imaging display of the TMJs, the SE images might be better than GE images to provide the stable recognition of the menisci. 17 refs., 7 figs., 5 tabs.

• OSTI ID: 457554
• Journal Information: Journal of Computer Assisted Tomography, Journal Name: Journal of Computer Assisted Tomography Journal Issue: 3 Vol. 20; ISSN JCATD5; ISSN 0363-8715
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
55 BIOLOGY AND MEDICINE
BASIC STUDIES
BONE JOINTS
NMR IMAGING