Morphometric study of lateral ventricles of brain is important for evaluating changes due to growth, ageing, intrinsic and extrinsic pathologies. The aims of this study were to examine the range in size of normal lateral ventricles of brain, and to compare the dimensions of with reference to gender and side by CT Scans. Materials and Methods: The study was done from Feb 2009 to July 2010. Materials for the study were collected from K.R.Hospital attached to M.M.C & R.I. Mysore. 200 normal CT scans of patients were collected (100 male and 100 females). Measurements were taken as follows, 1) at the level of interventricular foramen (IVF)-IVF to tip of frontal horn, 2) from IVF-from IVF to collateral trigone and Posterior horn from collateral trigone to tip of posterior horn,3) below the level of IVF-Transverse diameter and Height of inferior horn. Results: All the measurements except inferior horn were more in males compared to females and more on left side than right side. Measurements of inferior horn transverse diameter (TD) the right side were slightly (0.2 mm) more than left side in males and equal in females. Height (HT) of inferior horn was 0.3 mm more on right side in males and 0.1 mm in females. Conclusion: The study shows the normal range of measurements of different parts of lateral ventricles in male and female patients. Left ventricles are larger than right side in males compared to females.

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