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Improving the process of making rapid prototyping models from medical ultrasound images
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Orientador(es)
Resumo(s)
Purpose – Today, medical models can be made by the use of medical imaging systems through modern image processing methods and rapid
prototyping (RP) technology. In ultrasound imaging systems, as images are not layered and are of lower quality as compared to those of computerized
tomography (CT) and magnetic resonance imaging (MRI), the process for making physical models requires a series of intermediate processes and it is a
challenge to fabricate a model using ultrasound images due to the inherent limitations of the ultrasound imaging process. The purpose of this paper is
to make high quality, physical models from medical ultrasound images by combining modern image processing methods and RP technology.
Design/methodology/approach – A novel and effective semi-automatic method was developed to improve the quality of 2D image segmentation
process. In this new method, a partial histogram of 2D images was used and ideal boundaries were obtained. A 3D model was achieved using the exact
boundaries and then the 3D model was converted into the stereolithography (STL) format, suitable for RP fabrication. As a case study, the foetus was
chosen for this application since ultrasonic imaging is commonly used for foetus imaging so as not to harm the baby. Finally, the 3D Printing (3DP) and
PolyJet processes, two types of RP technique, were used to fabricate the 3D physical models.
Findings – The physical models made in this way proved to have sufficient quality and shortened the process time considerably.
Originality/value – It is still a challenge to fabricate an exact physical model using ultrasound images. Current commercial histogram-based
segmentation method is time-consuming and results in a less than optimum 3D model quality. In this research work, a novel and effective
semi-automatic method was developed to select the threshold optimum value easily.
Descrição
Palavras-chave
Rapid prototypes Image processing 3D printing Ultrasound imaging Foetus model
Contexto Educativo
Citação
Vaezi M, Kai Chua C, Meng Chou S (2012), "Improving the process of making rapid prototyping models from medical ultrasound images". Rapid Prototyping Journal, Vol. 18 No. 4 pp. 287–298, doi: https://doi.org/10.1108/13552541211231716
Editora
Emerald