| Summary: | Introduction: Susceptibility-weighted imaging (SWI) is a new method in MR imaging. SWI detects the signal loss created by disturbance of a homogeneous magnetic field; these disturbances can be caused by paramagnetic, ferromagnetic, or diamagnetic substances. There are many neurologic conditions that can benefit from this method. Objective: To assess the role of magnetic susceptibility weighted imaging in evaluation of brain lesions. Methods: The study was conducted on 30 patients with different brain lesions. Routine MRI study and SWI were done to all patients. Results: The study included 30 patients with different brain lesions, including three patients with diffuse axonal injury, six patients with stroke, six patients with brain tumors, six patients with chronic microbleeds, five patients with venous malformations and venous thrombosis and four patients with extra-axial hemorrhage. In all patients SWI proved excellent demonstration of veins as well as bleeds. Conclusion: SWI is valuable in the diagnosis of different brain lesions and should be included in routine assessment of the brain. Keywords: SWI, Microbleeds
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