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Objective To study the DCM file data of patients' CT or MRI to be processed by the developed software to provide scalp projection positioning data for parasickle lesions and accurately locate surgical incisions. Methods The software system is deployed on a cloud platform and used in a browser to perform 3D modeling on the uploaded CT or MRI examination data of the patient's skull. Create 3 views including horizontal position, sagittal position and coronal position plus a 3D view. Through coordinate conversion, the curve length from the brow to the target point near the sickle is calculated, and the projection position of the lesion on the scalp surface is confirmed. Results All patients with parasickle lesions were able to locate successfully and accurately, and the unnecessary damage caused by rough positioning was solved. Conclusion The software is used to calculate and process the DCM file data of the patient's CT or MRI examination to provide reliable positioning data for the lesions near the sickle. It is a simple and accurate scalp positioning method for the lesions near the sickle. [ABSTRACT FROM AUTHOR]