Practical workflow for rapid prototyping of radiation therapy positioning devices (original) (raw)

CAD modelling and Rapid Prototyping as tools in medical applications

The manufacturing world is actually the main field for the application of CAD methods and Rapid Prototyping (RP) technology, but these are more and more widely used in medicine too. The development of appliances is chiefly related to producing either models for inspection use or prosthesis, directly or by a mould casting process. This paper describes the procedure followed to design and build a model of a cranial prosthesis, aimed to remedy a large defect due to a trauma.

PRODUCTION OF ANATOMICAL MODEL S BY RAPID PROTOTYPING TECHNOLOG Y

his project investigates the suitability of using RP technology and associated medical software solutions to transfer 2D Digital Imaging and Communications in Medicine (DICOM) data into 3d Standard Triangle Language (STL) data. This data is then utilized using medical software solutions to manufacture preope rative planning models and customized medical implants for the benefit of patients and surgical planning teams alike. The project also gives an overview of relevant subject matter such as medical scanning, preoperative planning models, customized implants, jigs and biocompatible materials. Case studies are included as a method of illustrating how the different technologies integrate and function to produce tangible successful outcomes that make a significant difference in medical interventions

Medical rapid prototyping applications and methods

Assembly Automation, 2005

Design methods for medical rapid prototyping (RP) of personalized cranioplasty implants are presented in this paper. These methods are applicable to model cranioplasty implants for all types of the skull defects including beyondmidline and multiple defects. The methods are based on two types of anatomical data, solid bone models (STereoLithography les -STL) and bone slice contours (Initial Graphics Exchange Speci cation -IGES and StrataSys Layer les -SSL). The bone solids and contours are constructed based on computed tomography scanning data, and these data are generated in medical image processing and STL slicing packages.

Use of a 3D printer to create a bolus for patients undergoing tele-radiotherapy

Internatuinal Journal of Radiation Research, 2016

Background: This study describes the possibility of implemen ng threedimensional prin ng technology to create a precise construc on of a planned bolus, based on computed tomography informa on stored in the Digital Imaging and Communica ons in Medicine (DICOM) format file. Materials and Methods: To create the bolus with a 3D printer, we converted data in the DICOM format to the stereolithography (STL) format. In addi on, we produced a paraffin bolus that, tradi onally, is manually placed directly on the pa ent. CT scans were acquired for both boluses, and the images were superimposed onto the pa ent CT scans that were used to design the bolus. The superimposi on of images was performed to compare the fit of the bolus printed on a 3D printer to that of the paraffin bolus made in the tradi onal way. In addi on, for both models, the dose distribu on was simulated. To quan fy the level of matching ML, special formula was used. The ML parameter had a value between 0 and 100%, where 100% indicated a perfect fit between the model and the 3D printed bolus. Results: We verified that 100% of the volume of the 3D printed bolus was located within the contour of the designed model. The ML of the bolus was 94%. For the classical paraffin bolus the ML was only 28%. Conclusion: A bolus printed on a threedimensional printer can faithfully reproduce the structure specified in the project plan. Compared to the classical paraffin bolus, the three-dimensional printed bolus more closely matched the planned model and possessed greater material uniformity.

Medical Modeling and Fabrication of Surgical Guides

Journal of University of Shanghai for Science and Technology, 2021

Medical Modelling and Rapid Prototyping are being used extensively to produce accurate implants. Rapid Prototyping has been used in making 3D medical models. The models help in personalizing pre-surgical treatment and pre-operative planning. Medical modelling is used for creation of high precision physical models from medical scans. The process includes collecting scans. The process includes collecting human anatomy data and optimizing the data for manufacturing and creating models using rapid prototyping. Computer aided software is used for prototyping. To produce high precision models, the modelling has to be in 3D. Therefore, a proper scanning method has to be used for each type of surgery. In this work we have taken a case study of fingers of hand to design and develop the 3D model for each case. We have designed, developed and fabricated one of the surgical guides for the fingers of hand. The design and fabrication was done in the 3D slicer and Grab CAD software independently. ...