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Abstract

The paper presents functionality and operation results of a system for creating dynamic maps of acoustic noise employing the PL-Grid infrastructure extended with a distributed sensor network. The work presented provides a demonstration of the services being prepared within the PLGrid Plus project for measuring, modeling and rendering data related to noise level distribution in city agglomerations. Specific computational environments, the so-called domain grids, are developed in the mentioned project. For particular domain grids, specialized IT solutions are prepared, i.e. software implementation and hardware (infrastructure adaptation), dedicated for particular researcher groups demands, including acoustics (the domain grid “Acoustics”). The infrastructure and the software developed can be utilized mainly for research and education purposes, however it can also help in urban planning. The engineered software is intended for creating maps of noise threat for road, railways and industrial sources. Integration of the software services with the distributed sensor network enables automatic updating noise maps for a specific time period. The unique feature of the developed software is a possibility of evaluating auditory effects which are caused by the exposure to excessive noise. The estimation of auditory effects is based on calculated noise levels in a given exposure period. The outcomes of this research study are presented in a form of the cumulative noise dose and the characteristics of the temporary threshold shift.
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Authors and Affiliations

Bożena Kostek
Andrzej Czyżewski
Józef Kotus
Maciej Szczodrak
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Abstract

At the current stage of diagnostics and therapy, it is necessary to perform a geometric evaluation of facial skull bone structures basing upon virtually reconstructed objects or replicated objects with reverse engineering. The objective hereof is an analysis of imaging precision for cranial bone structures basing upon spiral tomography and in relation to the reference model with the use of laser scanning. Evaluated was the precision of skull reconstruction in 3D printing, and it was compared with the real object, topography model and reference model. The performed investigations allowed identifying the CT imaging accuracy for cranial bone structures the development of and 3D models as well as replicating its shape in printed models. The execution of the project permits one to determine the uncertainty of components in the following procedures: CT imaging, development of numerical models and 3D printing of objects, which allows one to determine the complex uncertainty in medical applications.

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Bibliography

[1] D. Mitsouras, P. Liacouras, A. Imanzadeh, A.A. Giannopoulos, T. Cai, K.K. Kumamaru, and V.B. Ho. Medical 3D printing for the radiologist. RadioGraphics, 35(7):1965–1988, 2015. doi: 10.1148/rg.2015140320.
[2] F. Paulsen and J. Wasche. Sobotta Atlas of Human Anatomy, General anatomy and musculoskeletal system. Vol. 1, 2013.
[3] G.B. Kim, S. Lee, H. Kim, D.H. Yang, Y.H. Kim, Y.S. Kyung, and S.U. Kwon. Threedimensional printing: basic principles and applications in medicine and radiology. Korean Journal of Radiology, 17(2):182–197, 2016. doi: 10.3348/kjr.2016.17.2.182.
[4] J.W. Choi and N. Kim. Clinical application of three-dimensional printing technology in craniofacial plastic surgery. Archives of Plastic Surgery, 42(3):267–277, 2015. doi: 10.5999/aps.2015.42.3.267.
[5] J.E. Loster, M.A. Osiewicz, M. Groch, W. Ryniewicz, and A. Wieczorek. The prevalence of TMD in Polish young adults. Journal of Prosthodontics, 26(4):284–288, 2017. doi: 10.1111/jopr.12414.
[6] A.S. Soliman, L. Burns, A. Owrangi, Y. Lee,W.Y. Song, G. Stanisz, and B.P. Chugh. A realistic phantom for validating MRI-based synthetic CT images of the human skull. Medical Physics, 44:4687–4694, 2017. doi: 10.1002/mp.12428.
[7] F. Heckel, S. Zidowitz, T. Neumuth, M. Tittmann, M. Pirlich, and M. Hofer. Influence of image quality on semi-automatic 3D reconstructions of the lateral skull base for cochlear implantation. In CURAC, 129–134, 2016.
[8] G. Budzik, T. Dziubek, and P. Turek. Basic factors affecting the quality of tomographic images. Problems of Applied Sciences, 3:77–84, 2015. (in Polish)
[9] S. Singare, C. Shenggui and N. Li. The Benefit of 3D Printing in Medical Field: Example Frontal Defect Reconstruction. Journal of Material Sciences & Engineering, 6(2):335, 2017. doi: 10.4172/2169-0022.1000335.
[10] A. Ryniewicz, K. Ostrowska, R. Knapik, W. Ryniewicz, M. Krawczyk, J. Sładek, and Ł. Bojko. Evaluation of mapping of selected geometrical parameters in computer tomography using standards. Przegląd Elektrotechniczny, 91(6):88–91, 2015. (in Polish) doi: 10.15199/48.2015.06.17.
[11] R. Kaye, T. Goldstein, D. Zeltsman, D.A. Grande, and L.P. Smith. Three dimensional printing: a review on the utility within medicine and otolaryngology. International Journal of Pediatric Otorhinolaryngology, 89:145-148, 2016. doi: 10.1016/j.ijporl.2016.08.007.
[12] G.T. Grant and P.C. Liacouras. Craniofacial Applications of 3D Printing. In: 3D Printing in Medicine: A Practical Guide for Medical Professionals. Rybicki, Frank J., Grant, Gerald T. (Eds.), Springer, Cham, Switzerland, pp. 43–50, 2017. doi: 10.1007/978-3-319-61924-8_5.
[13] T. Cai, F.J. Rybicki, A.A. Giannopoulos, K. Schultz, K.K. Kumamaru, P. Liacouras, and D. Mitsouras. The residual STL volume as a metric to evaluate accuracy and reproducibility of anatomic models for 3D printing: application in the validation of 3D-printable models of maxillofacial bone from reduced radiation dose CT images. 3D Printing in Medicine, 1(1):2, 2015. doi: 10.1186/s41205-015-0003-3.
[14] T.Y. Hsieh, B. Cervenka, R. Dedhia, E.B. Strong, and T. Steele. Assessment of a patient- specific, 3-dimensionally printed endoscopic sinus and skull base surgical model. JAMA Otolaryngology–Head & Neck Surgery, 144(7):574-579, 2018. doi: 10.1001/jamaoto.2018.0473.
[15] Y.W. Chen, C.T. Shih, C.Y. Cheng, and Y.C. Lin. The development of skull prosthesis through active contour model. Journal of Medical Systems, 41:164, 2017. doi: 10.1007/s10916-017-0808-2.
[16] J.S. Naftulin, E.Y. Kimchi, and S.S. Cash. Streamlined, inexpensive 3D printing of the brain and skull. PLoS One, 10(8):e0136198, 2015. doi: 10.1371/journal.pone.0136198.
[17] A. Ryniewicz, K. Ostrowska, Ł. Bojko, and J. Sładek. Application of non-contact measurement methods for the evaluation of mapping the shape of solids of revolution. Przegląd Eletrotechniczny, 91(5):21–24, 2015. (in Polish). doi: 10.15199/48.2015.05.06.
[18] V. Favier, N. Zemiti, O.C. Mora, G. Subsol, G. Captier, R. Lebrun. and B. Gilles. Geometric and mechanical evaluation of 3D-printing materials for skull base anatomical education and endoscopic surgery simulation – A first step to create reliable customized simulators. PloS One, 12(12): e0189486, 2017. doi: 10.1371/journal.pone.0189486.
[19] M.P. Chae,W.M. Rozen, P.G. McMenamin, M.W. Findlay, R.T. Spychal, and D.J. Hunter-Smith. Emerging applications of bedside 3D printing in plastic surgery. Frontiers in Surgery, 2:25, 2015. doi: 10.3389/fsurg.2015.00025.
[20] J.A. Sładek. Coordinate Metrology. Accuracy of Systems and Measurements. Springer, 2015.
[21] ISO 15530-3:2011: Geometrical product specifications (GPS) – Coordinate measuring machines (CMM): Technique for determining the uncertainty of measurement – Part 3: Use of calibrated workpieces or measurement standards.
[22] A. Marro, T. Bandukwala, and W. Mak. Three-dimensional printing and medical imaging: a review of the methods and applications. Current Problems in Diagnostic Radiology, 45(1): 2–9, 2016. doi: 10.1067/j.cpradiol.2015.07.009.
[23] A. Ryniewicz. Evaluation of the accuracy of the surface shape mapping of elements of biobearings in in vivo and in vitro tests. Scientific Works of the Warsaw University of Technology. Mechanics, 248:3–169, 2013. (in Polish).
[24] B.M. Mendez, M.V. Chiodo, and P.A. Patel. Customized “In-Office” three-dimensional printing for virtual surgical planning in craniofacial surgery. The Journal of Craniofacial Surgery, 26(5):1584–1586, 2015. doi: 10.1097/SCS.0000000000001768.
[25] J.J. de Lima Moreno, G.S. Liedke, R. Soler, H.E.D. da Silveira, and H.L.D. da Silveira. Imaging factors impacting on accuracy and radiation dose in 3D printing. Journal of Maxillofacial and Oral Surgery, 17(4):582–587, 2018. doi: 10.1007/s12663-018-1098-z.
[26] S.W. Park, J.W. Choi, K.S. Koh and T.S. Oh. Mirror-imaged rapid prototype skull model and pre-molded synthetic scaffold to achieve optimal orbital cavity reconstruction. Journal of Oral and Maxillofacial Surgery, 73(8):1540–1553, 2015. doi: 10.1016/j.joms.2015.03.025.
[27] K.M. Day, P.M. Phillips, and L.A. Sargent. Correction of a posttraumatic orbital deformity using three-dimensional modeling. Virtual surgical planning with computer-assisted design, and three-dimensional printing of custom implants. Craniomaxillofacial Trauma and Reconstruction, 11(01):078–082, 2018. doi: 10.1055/s-0037-1601432.
[28] Y.C. Lin, C.Y. Cheng, Y.W. Cheng, and C.T. Shih. Skull repair using active contour models. Procedia Manufacturing, 11: 2164–2169, 2017. doi: 10.1016/j.promfg.2017.07.362.
[29] J.N. Winer, F.J. Verstraete, D.D. Cissell, S. Lucero, K.A. Athanasiou and B. Arzi. The application of 3-dimensional printing for preoperative planning in oral and maxillofacial surgery in dogs and cats. Veterinary Surgery, 46(7):942–951, 2017. doi: 10.1111/vsu.12683.
[30] J.Y. Lim, N. Kim, J.C. Park, S.K. Yoo, D.A. Shin, and K.W. Shim. Exploring for the optimal structural design for the 3D-printing technology for cranial reconstruction: a biomechanical and histological study comparison of solid vs. porous structure. Child’s Nervous System, 33(9):1553–1562, 2017. doi: 10.1007/s00381-017-3486-y.
[31] W. Shui, M. Zhou, S. Chen, Z. Pan, Q. Deng, Y. Yao, H. Pan, T. He, and X. Wang. The production of digital and printed resources from multiple modalities using visualization and three-dimensional printing techniques. International Journal of Computer Assisted Radiology and Surgery, 12(1):13–23, 2017. doi: 10.1007/s11548-016-1461-9.
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Authors and Affiliations

Andrzej Ryniewicz
1 2
Wojciech Ryniewicz
3
Stanisław Wyrąbek
1
Łukasz Bojko
4

  1. Cracow University of Technology, Faculty of Mechanical Engineering, Poland.
  2. State University of Applied Science, Nowy Sącz, Poland.
  3. Jagiellonian University Medical College, Faculty of Medicine, Dental Institute, Department of Dental Prosthodontics, Cracow, Poland.
  4. AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics, Department of Machine Design and Technology, Cracow, Poland.
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Abstract

Computer-aided tools help in shortening and eradicating numerous repetitive tasks that reduces the gap between digital model and actual product. Use of these tools assists in realizing free-form objects such as custom fit products as described by a stringent interaction with the human body. Development of such a model presents a challenging situation for reverse engineering (RE) which is not analogous with the requirement for generating simple geometric models. Hence, an alternating way of producing more accurate three-dimensional models is proposed. For creating accurate 3D models, point clouds are processed through filtering, segmentation, mesh smoothing and surface generation. These processes help in converting the initial unorganized point data into a 3D digital model and simultaneously influence the quality of model. This study provides an optimum balance for the best accuracy obtainable with maximum allowable deviation to lessen computer handling and processing time. A realistic non trivial case study of free-form prosthetic socket is considered. The accuracy obtained for the developed model is acceptable for the use in medical applications and FEM analysis.

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Authors and Affiliations

Vimal Kumar Pathak
Chitresh Nayak
Amit Kumar Singh
Himanshu Chaudhary
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Abstract

A specified weight-cutting system for irregular solid materials such as rubber is important for industrial engineering. Currently, the workers’ experience is used, which has low accuracy and efficiency. A specified weight cutting system for irregular solid material based on 3D scanning is proposed in this paper, which aims to overcome the inaccuracy and inefficiency of the manual cutting process. Firstly, the surface of the irregular solid material is scanned by a tracking 3D laser scanner, and a triangular mesh file is generated. Secondly, the defects of the 3D model are repaired by reverse engineering, and then the 3D model file of the irregular objects is generated. Finally, the cutting position of the specified weight solid material is calculated by the calculation algorithm in UG software. In short, this research creates a new method for processing data collected by the 3D scanner, by working jointly with multiple devices and software, facilitating the cutting of irregular solid materials with specified weights. Additionally, the system has the advantage of accuracy and efficiency over the experience of workers.
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Authors and Affiliations

Jiadong He
1
ORCID: ORCID
Yafeng Huang
2
Xiao Zang
1
Yajun Zhang
1

  1. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
  2. Xi’an Modern Chemistry Research Institute, Xi’an, 710065, China
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Abstract

The present article deals with the possibility of using the reverse engineering method for the production of prototype molds by Patternless

process technology. Article describes method how to obtain virtual model by using a 3D scanner. Article also explains principle of the

Patternless process technology, which is based on the milling mold cavity using CNC machining equipment. The aim of the research is the

use of advanced technologies that speed up and facilitate the process of production prototype mold. The practical result of the presented

experiment is bronze casting, which serves as a foot rest bracket on historic bike.

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Authors and Affiliations

E. Krivoš
R. Pastirčák
P. Lehocký
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Abstract

The paper presents the problem of assessing the accuracy of reconstructing free-form surfaces in the CMM/CAD/CAM/CNC systems. The system structure comprises a coordinate measuring machine (CMM) PMM 12106 equipped with a contact scanning probe, a 3-axis Arrow 500 Vertical Machining Center, QUINDOS software and Catia software. For the purpose of surface digitalization, a radius correction algorithm was developed. The surface reconstructing errors for the presented system were assessed and analysed with respect to offset points. The accuracy assessment exhibit error values in the reconstruction of a free-form surface in a range of ± 0.02 mm, which, as it is shown by the analysis, result from a systematic error.

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Authors and Affiliations

Artur Wójcik
Magdalena Niemczewska-Wójcik
Jerzy Sładek

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