الفهرس 
Anatomy of the orbitOnly 14 pages are availabe for public view
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Abstract
Introduction:
Orbital lesions represent a spectrum of benign and malignant lesions in adults and children that can be challenging to diagnose and treat. Imaging plays an important role in diagnosis, due to a potentially limited clinical examination and risks associated with biopsy.MR imaging is a powerful tool for imaging the orbit, due to the excellent tissue contrast it provides.
Aims:
This study aims at assessing the ability of diffusion weighted magnetic resonance imaging to differentiate the benign from malignant orbital lesions.
Methodology:
This study included 25 patients, they were El- demerdash patients with non traumatic orbital lesions. All age groups. Patient with clinical and radiological findings of non traumatic orbital lesions.
Results:
The pool of our study is 25 patients (16 female and 9) with orbital lesions the patients age range from 1 year to 70 years.
Conclusion:
that the combination of conventional MRI finding and ADC calculation together with clinical finding could improve the diagnostic efficacy of MR imaging in the differentiation between benign and malignant orbital masses with considering a cut off ADC value of 0.89 x10−3 mm2/s between benign and malignant orbital masses with specificity 83.3% & sensitivity 90.5%.