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Background Static MRI was used as an effective tool for diagnosis of temporomandibular joint dysfunction instead of invasive techniques such as arthroscopy and arthrography. The purpose of this study was to detect whether dynamic MRI can be used instead of static MRI in diagnosis of TMJ dysfunction or not. Results According to disc displacement, anterior disc displacement was detected in 29 joints (36.25%) by both static and dynamic MRIs, and medial and lateral disc displacements were detected only by static MRI. Regarding disc mobility, dynamic MRI detects stuck disc in 4 joints versus 2 joints detected by static MRI (p value 0.008). Condylar translation was abnormal in 18 joints (22.5%) by static MRI and in 26 joints (32.5%) by dynamic MRI (p value < 0.001). The detection rate of articular disc for dynamic MRI was 87.5% versus static MRI 92.5% (p value 0.038), and the detection rate of condylar head for dynamic MRI was 97.5% versus static MRI 100% (p value 0.012). Conclusion Dynamic MRI cannot replace static MRI in evaluation of TMJ dysfunction; both of them support each other for accurate diagnosis and better image quality.

Background It was important to develop a non-invasive imaging technique for early evaluation of spinal cord integrity after injury; MRI was the method of choice for evaluation of any cord abnormalities. However, some patients have symptoms with no detectable abnormalities by MRI. The purpose of our study was to assess the role of diffusion tensor MRI in evaluating the integrity of spinal cord fibers in case of spinal trauma. Results Out of the studied 30 patients, conventional MRI revealed abnormalities in the spinal cord in 23 patients (76.67%), diffusion tensor tractography revealed abnormalities in the spinal cord in 27 patients (90%), the mean FA value at the level of injury (0.326±0.135) was less than the mean FA value (0.532 ± 0.074) in control group (p value < 0.001), and the mean ADC value at the level of injury (1.319 ± 0.378) was less than the mean ADC value (1.734 ± 0.768) in the control group. FA was sensitive than ADC in the detection of the spinal cord abnormalities with a sensitivity of 93.33% versus 67.66% respectively. Conclusion DTI can be used to detect structural changes of spinal cord white matter fibers in acute spinal cord injury. A significant decrease of fractional anisotropy and apparent diffusion coefficient has been found at the site of spinal cord injury.

Background: Thyroid nodules are the most common disorder of thyroid gland. In Egypt, nodular goiter occurs in 4%-7% of the population. New radiological imaging techniques might be promising for the differential diagnosis of thyroid nodularity's.Objective: to determine the diagnostic role of diffusion weighted imaging (DWI) in the differentiation of malignant and benign thyroid nodules by using histopathological study as the reference standard.Patients and Methods: 35 patients were included in this study (28 females and 7 males), their ages vary from (12 years to 75 years) with mean age of 48.65 (±14.72). All patients were referred to the surgical department, El Houssin University Hospital in the time period from July 2018 to August 2019 with thyroid gland enlargement. Results: In our study, there were 7(20.6%) males and 28 (80%) females in the patients group. Percentage of benign thyroid nodule was 52.9%. Percentage of malignant thyroid nodules was 47.1%. apparent diffusion coefficient (ADC) value was calculated for both benign and malignant nodules, the range of ADC values for benign thyroid nodules were (0.03 to 3.5) of mean (1.86 ± 0.82) and (0.5 to 1.5) of mean (1.04 ± 0.2), p value was significant with a cut off value 1.2 with 93% sensitivity and 83% specificity.Conclusion: DWI provides very useful and promising results on the nature of a thyroid nodule. Even these results may have a role in the selection of nodules that were going to undergo fine-needle aspiration cytology (FNAC). Although these results were promising, further investigations are needed with larger patient groups.