Purpose: This study was performed to evaluate MR signal intensity(SI) of calcification and to assess thecapability of MRI in detection of various intracranial calcifications. Materials and Methods: The MR findings andROI value of experimental model of calcium carbonate suspension according to each concentration (20,35,50%) anddiameter (1-10mm) and hydroxyapatite suspension according to each concentration (10,20,30,40,50%) were analyzed. Aspecimen of calcification in craniopharyngioma was analyzed for its composition by XRD(X-ray diffractometer) andICP(inductively coupled plasma) methods. MRI MRI of 34 patients with intracranial calcifications wereretrospectively analyzed for signal intensity of the calcification and its capability to detect calcificationsaccording to size, location, and contrast with adjacent lesion. Results; The calcium carbonate phantom with largerdiameter and low concentration showed lower signal intensity on T2 than T1WI. Hydroxyapatite phantom showed highsignal intensity in 10-30% concentration and low signal intensity in 40-50% concentration on T1 weighted image.The 5 cases of 34 intracranial calcifications showed high signal intensity on T1 weighted image. The capability ofMRI in the detection of intracranial calcifications decreased in the circumstances such as small size(<2.5mm) andintraventricular location. Although the size of calcification was small, the detection was easy in the goodcontrast with adjacent lesion. However, the detection of the small sized calcification was easy if the contrastwith adjacent lesion was good. Conclusion; Intracranial calcification shows generally low signal intensity on T1and T2 weighted image with the exception of occasional high SI on T1WI. Detection of intracranial calcification inMRI is affected by its composition, size, location, and contrast with adjcent lesion.