Introduction: The use of 3D printing has already been strongly integrated into the field of medicine and radiology. The use of advanced visualization in radiology is an added value in diagnostics, as it provides additional information about anatomical and pathological structures. When creating a model, anatomical structures are segmented from DICOM data and converted into virtual 3D models and stored in files that are recognized by a 3D printer. The production of the final product can be divided into several steps, these are data aquisition, data storage, model creation (data upload, trimming, segmentation, visualization), STL file creation, print preparation, model printing and post-processing. Purpose: : The purpose of the master thesis is to present the process of creating a 3D model from diagnostic image data obtained by CT imaging. The aim of the master's thesis is to develop a procedure for preparing a model for 3D printing from CT images and to carry out the procedure on a practical example. In this case, we will be interested in the technical and practical requirements of such production Methods. First, in the field of 3D printing, we reviewed the selected literature, we looked for information about usability in practice, the printing process itself and the requirements for making the model. In the second part, we made a 3D model on the example of the hip and learned about different segmentation techniques in the 3D Slicer program. Results: In the segmentation process, there are different ways to segment data. We know hand tools and semi-automatic segmentation methods, which include threshold, fill between slices, level tracing and grow from seeds. In creating our model, we used the thresholding method as a basic segmentation with manual corrections. The resulting STL file was exported to the print program, the parameters were set and the hip model was printed. Errors at each stage of the design are amplified in subsequent steps. Discussion and conclusion: Segmentation is one of the most important processes in 3D printing. However, different methods have their advantages and disadvantages. In our case, we concluded that the methods of thresholding and grow from seeds are very similar techniques and give the most effective results. Studies in various fields classify 3D printing as a useful method for challenging cases, learning procedures, understanding complex anatomy and optimizing procedures. Creating a 3D model requires multidisciplinary collaboration between doctors, radiologic technologist and other 3D engineers, but it is still unclear which profession should be responsible for each step.
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