Role of diffusion-weighted MR imaging in discrimination between the intracranial cystic masses |
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Authors: | Ahmed Farid Yousef Amany Elkharbotly Magdy Settin Yasser Mousa |
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Institution: | 1. Radiology Department, Benha Faculty of Medicine, Egypt;2. Radiology Department, Mansoura Faculty of Medicine, Egypt;3. Radiology Department, Mansoura University, Oncology Center, Egypt |
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Abstract: | ObjectiveDiscriminating pyogenic brain abscesses from cystic or necrotic tumors is sometimes difficult with CT or conventional MR imaging. Diffusion MR imaging is a valuable diagnostic test in cases of intracranial cystic masses.MethodsThis work was conducted from July 2008 to June 2013 on 90 patients; 43 males and 47 females. Their ages range from 5 to 70 years. All patients were subjected to routine MRI examination and diffusion weighted imaging using 1.5 T MRI scanner. Gadolinium was given to some cases on routine MRI. Diffusion weighted imaging was performed with a single-shot spin-echo echo-planar pulse sequence (b = 0–1000 s/mm2). The apparent diffusion coefficient values and ratio were measured.Results and conclusionsPatients in this study were categorized into three main groups; first group is brain abscesses (36 cases), 91.6% of them showed restricted diffusion, second group is malignant cystic or necrotic brain tumors, 28 cases of high grade necrotic glioma, 60.7% of them are free diffusion, and third group is benign cystic masses, arachnoid and epidermiod cysts (11 cases); all arachnoid cysts are free diffusion. From these results diffusion-weighted imaging is playing an important role in discrimination of cystic intracranial masses. |
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Keywords: | Diffusion Brain Abscess Tumor |
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