in tumour has been developed on 2D-MRI data which allows the identification of tumour issue with high accuracy and reproducibility compared to manual techniques. This method incorporates with some noise removal functions, segmentation and morphological operations which are the basic concepts of image processing. Detection and extraction of tumour from MRI scan images of the brain is done by using MATLAB software. The aim of this work is design an automated tool for brain tumour quantification using MRI image data sets.