The presence of calcification in the brain on CT requires a subset of conditions depending on age. In the elderly, physiological calcifications can occur in four areas: choroid plexus, pineal region, basal ganglia and falx cerebri, which are normal physiological phenomena. If calcifications are present in areas other than these four areas of the brain, they may be inflammatory, vascular or mass lesions, etc., and require further diagnosis by MRI. In children, calcifications in these four areas may be the result of lesions such as germ cell tumors, pineal cell tumors, or parasitic infections.