I developed a GUI to plan pedicle screws easily using the mouse (compatible with curved spines CTs). The planned screws are shown over 2D Slices (axial, sagittal and coronal) and a 3D view with realistic rendering of the spine. A PDF report detailing the surgical plan can be generated.There is also a simplified segmentation GUI to create the guidebases (those are the parts of the surgical guides that will touch the vertebraes and that mimic their shape for good fit).At last, there is GUI to create the surgical guide objects (drill guides, stability boxes, text labels) and to create the surgical guides. Each surgical guide has a guide base, two drill guides, a stability box that joins them, helpful text extrusions (like patientID, patientName, screwSizes, drillBitSizes, vertebraeLevel), optional are the bridge cylinders that may improve contact between the drill guides and the guide base,All this code is part of a Slicelet, a group of custom Slicer modules with personalized GUI. Slicer is a free, open source and multi-platform software package widely used for medical, biomedical, and related imaging research.