Purpose: To study the imaging pattern, location, prevalence, and multiplicity of arachnoid granulations in cerebral venous sinuses. Methods: We retrospectively reviewed 100 contrast-enhanced Brain MR studies, investigating the venous sinuses for discrete filling defects. After reviewing the imaging findings, we tried relating with clinical symptoms. Results: MR images show these entities as largely hypointense as compared to cerebrospinal fluid in T1and hyperintense in T2 sequences, isointense on FLAIR, hypointense on DWI and seen as filling defect in BRAVO sequence. Septations were seen as linear variations of signal intensity within the granulations. Altered MR signal intensity was occasionally noted, when calcifications were present. The granulations appear as filling defects at MR angiography. Due to elliptical shape on oblique MR angiographic images, they could be mistaken for thrombus. No clinical significance could be given to the existence of any of these arachnoid granulations. They occur in 0.3 to 1 of 100 adults in the population. Conclusion: On thin cross sectional imaging, arachnoid granulations in the venous sinuses are observed incidentally and are usually of no clinical significance. However, differentiation with intra sinus thrombus and tumor should be made. Index terms: Anatomy, Arachnoid Granulations, Dural venous sinuses, Thrombosis.