With intensive development of modern technology and appearance of digitalisation, the possibilities of radiology in medicine are growing each day. From the development of classic CT scan as first digital radiological method to the evolution of modern multidetector or multislice helical CT scanners. Furthermore, the development of more advanced computers and data processing softwares brought enhances in image reconstruction as well as new applications of reformatting techniques for image postprocessing. Although CT scanner uses traditional axial sections for imaging, with the benefits of multiplanar reformations, we can present the scanned object in other planes as well. Apart of basic anatomic planes, sagittal and coronal, using reconstructions in oblique and curved plane can also help with the diagnosing. Knowing information about radiation attenuation for each voxel and pixel, and with reformations such as MIP (Maximum Intensity Projection) or MinIP (Minimum Intensity Projection), we can obtain better display of structures with higher or lower attenuation values. Methods like VRT (Volume Rendering Technique) and SSD (Shaded Surface Display), offer three-dimensional image of object of interest. Furthemore, with segmentation process, we can choose structure we would like to analyse or we can simply exclude structures that disturb imaging the area of interest on CT scan. Having the virtual endoscopy technique, it is possible to show the internal lumen of hollow organs using raw data sets. Today, all of these applications are facilitating patients' examinations and correct diagnosis. However, the appropriate use of these aplications requires understanding the basic principles of functioning as well as their advantages and disadvantages.