scholarly journals A preoperative planning method for long tubular bone osteosynthesis

2020 ◽  
Vol 5 (4) ◽  
pp. 267-271
Author(s):  
A. S. Pankratov ◽  
Yu. V. Lartsev ◽  
J. G. Alayo ◽  
S. V. Ardatov ◽  
D. A. Ogurtsov ◽  
...  
Keyword(s):  
Surgical Approach ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
3D Models ◽  
Planning Method ◽  
Fracture Line ◽  
Tubular Bone ◽  
Upper Limbs ◽  
Calculation Algorithm ◽  
Fracture Consolidation

Objectives the development of a preoperative planning method for long tubular bone osteosynthesis using the contralateral healthy bone. Material and methods.To justify the usage of the opposite limbs intact segment model in order to reconstruct the damaged one, their matching in shape and size was analyzed. We built three-dimensional models of the right and left segments of the upper limbs of 20 people and compared them using the Hausdorff distance calculation algorithm. For treatment of a 24-year-old patient with a closed humerus fracture, an individual stereolithographic surgical template with fracture lines was created with the help of computed tomography data of the healthy humerus bone processed by AUTOPLAN EXPERT software. This template was used for pre-bending the plate for osteosynthesis. The plate positioning on the template defined the surgical approach, taking into account the anatomical structures located in the projection of the fracture line and the plate. The technique of "reverse bone reposition" on the prepared plate was applied. Results.With the help of the created 3D models we revealed the size differences of the symmetrical segments of upper limbs. The greatest difference in the limits was registered in the area of the epiphyses (heads of the humeri) up to 6.8 mm, and the smallest throughout the entire diaphysis, less than 1.5 mm. Due to preoperative planning there were no intraoperative and postoperative complications, the installation of the plate and osteosynthesis was convenient. The fracture consolidation took place in 3 months. Conclusion.The proposed method has a number of advantages. It is possible to make a stereolithographic template even for a seriously damaged bone with a copied fracture line. This allows the surgeon to plan the details of osteosynthesis, to model the plate according to the template, to determine the required length and shape of the surgical approach, thus reducing the surgical risks and injury for the patient.

scholarly journals A PREOPERATIVE PLANNING METHOD FOR LONG TUBULAR BONE OSTEOSYNTHESIS

2021 ◽  
Vol 29 (2) ◽  
pp. 213-220
Author(s):  
G.P. Kotelnikov ◽  
◽  
A.V. Kolsanov ◽  
A.S. Pankratov ◽  
S.V. Ardatov ◽  
...  
Keyword(s):  
Hausdorff Distance ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Planning Method ◽  
Tubular Bone ◽  
Dimensional Model ◽  
Color Mapping ◽  
3 Dimensional ◽  
The Difference ◽  
Shape And Size

Objective. To compare the shape and size of human contralateral humerus bones based on the «Autoplan» program to justify the possibility of using healthy bone in a preoperative planning for bone osteosynthesis (on the example of the humerus). Methods. 20 patients underwent computed tomography of the chest, shoulder girdleand upper extremities. Two-dimensional medical imaging of separate layers were converted into three-dimensional models of the humerus bone STL format, which is used for 3D printing in all 3D printers. Preliminary registration to superimpose the mirrored left humerus bone on the right one was carried out for at least 4 key points; their matching in shape and size was analyzed. A comparison was made of the contralateral humerus bones of one patient according to computed tomograms of 20 people. The main anatomical landmarks of the humerus bones and the distance between adjacent points were selected for comparison when the bones were superimposed on each other. Superimposed humeral bones were compared using the Hausdorff distance calculation algorithm, which is used to measure the difference between scanned models and the ground-truth model separately. To visualize the result of calculating of Hausdorff distance, that is, the difference between the bones, color mapping of the latter was performed, where the proximity to red color means the difference tends to zero, the proximity to blue - to 1 cm (the maximal obtained difference). Results. The greatest difference was recorded in humeral heads - up to 6.8 mm, and in the epicondyle: the medial epicondyle - up to 4.5 mm, the lateral epicondyle - up to 4.4 mm. Color mapping allowed to see that the difference between the heads of the humerus increases from the center of the articular surface to the attachment points of the capsule. At the level of the diaphysis, from the anatomical neck to the condyles, the size differencesamong allbones in 20 patients was no more than 1.5 mm. Conclusion. Thereby, the comparison of the shape and size of the contralateral bones of the human humerus based on the «Autoplan» program will allow applying a three-dimensional model of healthy contralateral bone in the preoperative planning for bone osteosynthesis: thus reducing the surgical risks and injury for the patient. What this paper adds For the first time, the use of a 3-dimensional model for a preoperative planning method for long tubular bone osteosynthesis using the contralateral healthy bone for affected bone has been proposed. It has been found that in the preoperative period during osteosynthesis of the diaphysis of long tubular bones, it is possible to use a healthy contralateral bone for plate of the damaged bone (on the example of the humerus fracture). The identity of the shape and size of the humerus diaphyses with an accuracy of 1.5 mm has been proved, and the possibility of using a 3-dimensional model of a healthy bone for preoperative planning for long tubular bone osteosynthesis is justified.

DOZ047.72: Three-dimensional printing for preoperative planning of open laryngotracheal surgery

2019 ◽  
Vol 32 (Supplement_1) ◽  
Author(s):  
G Fishman ◽  
O Wasserzug ◽  
P Berman ◽  
E Golden ◽  
A DeRow
Keyword(s):  
3D Printing ◽  
Preoperative Planning ◽  
Medical Center ◽  
Cricoid Cartilage ◽  
Three Dimensional ◽  
Balloon Dilation ◽  
3D Models ◽  
Subglottic Stenosis ◽  
Preliminary Results

Abstract Background Three-dimensional (3D) printing is being employed in a variety of surgical specialties to improve patient care. These models enable preoperative in vitro planning, advanced resident training, and better patient education. 3D models of the tracheobronchial tree that can simulate bronchoscopy and 3D printed cricoid cartilage models for balloon dilation training have been reported. A 3D model for preoperative planning of open laryngotracheal surgery has not been reported. Objectives The objective of this study was to report preliminary results with the employment of 3D printing technology for preoperative planning of laryngotracheoplasty (LTP) and cricotracheal resection (CTR). Materials and Methods Actual-size 3D models of the upper airway, from the level of the base of tongue to the level of the carina, have been created by the surgical 3D printing lab in the medical center. The models were based on computed tomography of two patients who were scheduled for LTP and CTR. The models were composed of several elements: the framework of the larynx and the trachea, the air column, the cannula, and the peri-stomal region. Results Two models were created, a model of a patient with grade III subglottic stenosis who subsequently underwent LTP and a model of a patient with grade IV subglottic stenosis who subsequently underwent CTR and end to end anastomosis. The 3D models were found to be useful for preoperative planning of the incision site in the trachea, the status of the tracheal and laryngeal framework, the length of the diseased segment, and the length of the rib cartilage graft to be harvested. Conclusions The preliminary results of this study imply that 3D models can be useful for preoperative planning of open laryngotracheal surgery. Further experience is required to establish its efficacy, the optimal model design, and cost effectiveness.

scholarly journals Three dimensional printed models of the airway for preoperative planning of open Laryngotracheal surgery in children: Surgeon’s perception of utility

2021 ◽  
Vol 50 (1) ◽  
Author(s):  
Oshri Wasserzug ◽  
Gadi Fishman ◽  
Narin Carmel-Neiderman ◽  
Yael Oestreicher-Kedem ◽  
Maher Saada ◽  
...  
Keyword(s):  
Surgical Approach ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Patient Specific ◽  
Upper Airways ◽  
Pediatric Airway ◽  
Incision Location ◽  
Laryngotracheal Reconstruction ◽  
Dimensional Models ◽  
Three Dimensional Models

Abstract Background Preoperative planning of open laryngotracheal surgery is important for achieving good results. This study examines the surgeon’s perception of the importance of using life size 3D printed models of the pediatric airway on surgical decision making. Methods Life-size three-dimensional models of the upper airway were created based on CT images of children scheduled for laryngotracheal-reconstruction and cricotracheal resection with anastomosis. Five pediatric airway surgeons evaluated the three-dimensional models for determining the surgical approach, incision location and length, graft length, and need for single or double-stage surgery of seven children (median age 4.4 years, M:F ratio 4:3). They rated the importance of the three-dimensional model findings compared to the direct laryngoscopy videos and CT findings for each domain on a validated Likert scale of 1–5. Results The mean rating for all domains was 3.6 ± 0.63 (“moderately important” to “very important”), and the median rating was 4 (“very important”). There was full agreement between raters for length of incision and length of graft. The between-rater agreement was 0.608 (“good”) for surgical approach, 0.585 (“moderate”) for incision location, and 0.429 (“moderate”) for need for single- or two-stage surgery. Conclusion Patient-specific three-dimensional printed models of children’s upper airways were scored by pediatric airway surgeons as being moderately to very important for preoperative planning of open laryngotracheal surgery. Large–scale, objective outcome studies are warranted to establish the reliability and efficiency of these models. Graphical abstract

scholarly journals Additive technologies in surgical treatment of spinal deformities

2018 ◽  
Vol 25 (3-4) ◽  
pp. 19-29 ◽  
Author(s):  
A. A Kuleshov ◽  
M. S Vetrile ◽  
A. N Shkarubo ◽  
V. V Docenko ◽  
N. A Es’kin ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Deformity Correction ◽  
3D Models ◽  
Upper Cervical Spine ◽  
Spinal Deformities ◽  
Custom Made ◽  
Upper Cervical ◽  
Spine Fixation

Purpose of study: to summarize the experience in three-dimensional biomodeling and custom made metal constructions for surgical treatment of spinal deformities of different localization and etiology, evaluate its advantages, potentialities and efficacy. Patients and methods. During the period from 2011 to 2018 three-dimensional (3D) custom-made spinal models were used in 52 patients with different spinal deformities: congenital multilevel spinal deformity (n=20), upper cervical spine deformities (n=12), III-IV degree of spondylolisthesis (n=10), neurogenic scoliosis (n=8), neurofibromatosis (n=2). 3D models were created in scale 1:1 by stereolithographic technique on the basis of computer model designed by spiral CT results. In all cases 3D models were used for preoperative planning including the intended deformity correction, decompression and spine fixation. In 26 cases 3D spinal models were used to manufacture the custom made metal constructions for the deformity correction and spine fixation: plates for the upper cervical spine anterior fixation, cervicothoracic junction, plates and cages for lumbosacral fixation, and implants for spinopelvic fixation. Results. In all cases the use of spine bio models enabled to achieve important additional information at preoperative planning and intraoperatively. Long-term follow up made up 3 years. After neural structures decompression and deformity correction good clinical and roentgenologic results were observed in all patients. Use of custom made implants ensured stable spine fixation in all cases with the exception of 3 patients in whom the implants were removed due to infectious complication (n=1) and poor postoperative wood healing. Conclusion. In deformities of different etiology the full-scale spine models provide better assessment of the deformity pattern and preoperative planning. 3D models and computer modeling make possible the manufacture of individual metal constructions for spine fixation that is especially topical in severe deformities.

ADVANCED 3D RAPID PROTOTYPING BIOMODELING TECHNIQUE FOR KNEE SURGERY

2015 ◽  
Vol 15 (06) ◽  
pp. 1540050
Author(s):  
LI-QIANG ZHI ◽  
MENG LI ◽  
KAI LIU ◽  
XING MA
Keyword(s):  
Minimally Invasive ◽  
Rapid Prototyping ◽  
3D Modeling ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Real Life ◽  
3D Models ◽  
Knee Surgery ◽  
Physical Models ◽  
Surgical Interventions

Advanced three-dimensional (3D) models have played more and more essential roles in orthopedics surgical interventions. In order to improve the clinical outcomes of knee surgery (KS) including minimally invasive knee surgery (MIKS), the melted extrusion modeling (MEM), a rapid prototyping (RP) technique, was used efficiently to fabricate real life-size 3D physical models of interesting knees. The applications and advantages of the tangible RP-constructed 3D models in KS were elucidated in this study. As a result, better preparation including optimal preoperative planning was made so that KS could be performed in an accurate, safe and fast manner for each case. Besides, the surgical skills of MIKS were substantially improved. Therefore, the results suggest that KS can benefit much from the advanced 3D modeling technique.

scholarly journals Immersive 3D virtual reality imaging in planning minimally invasive and complex adult cardiac surgery

2020 ◽  
Vol 1 (1) ◽  
pp. 62-70
Author(s):  
Amir H Sadeghi ◽  
Wouter Bakhuis ◽  
Frank Van Schaagen ◽  
Frans B S Oei ◽  
Jos A Bekkers ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Virtual Reality ◽  
Cardiac Surgery ◽  
Heart Surgery ◽  
Preoperative Planning ◽  
Operating Time ◽  
Three Dimensional ◽  
Cardiothoracic Surgery ◽  
Planning Tool ◽  
Computed Tomography Images

Abstract Aims Increased complexity in cardiac surgery over the last decades necessitates more precise preoperative planning to minimize operating time, to limit the risk of complications during surgery and to aim for the best possible patient outcome. Novel, more realistic, and more immersive techniques, such as three-dimensional (3D) virtual reality (VR) could potentially contribute to the preoperative planning phase. This study shows our initial experience on the implementation of immersive VR technology as a complementary research-based imaging tool for preoperative planning in cardiothoracic surgery. In addition, essentials to set up and implement a VR platform are described. Methods Six patients who underwent cardiac surgery at the Erasmus Medical Center, Rotterdam, The Netherlands, between March 2020 and August 2020, were included, based on request by the surgeon and availability of computed tomography images. After 3D VR rendering and 3D segmentation of specific structures, the reconstruction was analysed via a head mount display. All participating surgeons (n = 5) filled out a questionnaire to evaluate the use of VR as preoperative planning tool for surgery. Conclusion Our study demonstrates that immersive 3D VR visualization of anatomy might be beneficial as a supplementary preoperative planning tool for cardiothoracic surgery, and further research on this topic may be considered to implement this innovative tool in daily clinical practice. Lay summary Over the past decades, surgery on the heart and vessels is becoming more and more complex, necessitating more precise and accurate preoperative planning. Nowadays, operative planning is feasible on flat, two-dimensional computer screens, however, requiring a lot of spatial and three-dimensional (3D) thinking of the surgeon. Since immersive 3D virtual reality (VR) is an upcoming imaging technique with promising results in other fields of surgery, we aimed in this study to explore the additional value of this technique in heart surgery. Our surgeons planned six different heart operations by visualizing computed tomography scans with a dedicated VR headset, enabling them to visualize the patient’s anatomy in an immersive and 3D environment. The outcomes of this preliminary study are positive, with a much more reality-like simulation for the surgeon. In such, VR could potentially be beneficial as a preoperative planning tool for complex heart surgery.

scholarly journals Structured-light 3D scanning of exhibited historical clothing—a first-ever methodical trial and its results

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Jerzy Montusiewicz ◽  
Marek Miłosz ◽  
Jacek Kęsik ◽  
Kamil Żyła
Keyword(s):  
Cultural Heritage ◽  
Information Technologies ◽  
Structured Light ◽  
Three Dimensional ◽  
3D Models ◽  
3D Scanning ◽  
Dimensional Representation ◽  
3D Scanner ◽  
Three Dimensional Representation ◽  
3D Scanners

AbstractHistorical costumes are part of cultural heritage. Unlike architectural monuments, they are very fragile, which exacerbates the problems of their protection and popularisation. A big help in this can be the digitisation of their appearance, preferably using modern techniques of three-dimensional representation (3D). The article presents the results of the search for examples and methodologies of implementing 3D scanning of exhibited historical clothes as well as the attendant problems. From a review of scientific literature it turns out that so far practically no one in the world has made any methodical attempts at scanning historical clothes using structured-light 3D scanners (SLS) and developing an appropriate methodology. The vast majority of methods for creating 3D models of clothes used photogrammetry and 3D modelling software. Therefore, an innovative approach was proposed to the problem of creating 3D models of exhibited historical clothes through their digitalisation by means of a 3D scanner using structural light technology. A proposal for the methodology of this process and concrete examples of its implementation and results are presented. The problems related to the scanning of 3D historical clothes are also described, as well as a proposal how to solve them or minimise their impact. The implementation of the methodology is presented on the example of scanning elements of the Emir of Bukhara's costume (Uzbekistan) from the end of the nineteenth century, consisting of the gown, turban and shoes. Moreover, the way of using 3D models and information technologies to popularise cultural heritage in the space of digital resources is also discussed.

scholarly journals Comparative Analysis of Digital Models of Objects of Cultural Heritage Obtained by the “3D SLS” and “SfM” Methods

2021 ◽  
Vol 11 (12) ◽  
pp. 5321
Author(s):  
Marcin Barszcz ◽  
Jerzy Montusiewicz ◽  
Magdalena Paśnikowska-Łukaszuk ◽  
Anna Sałamacha
Keyword(s):  
Cultural Heritage ◽  
Low Cost ◽  
Three Dimensional ◽  
3D Models ◽  
Silk Road ◽  
Digital Models ◽  
Global Pandemic ◽  
University Of Technology ◽  
Three Dimensional Models ◽  
3D Digitisation

In the era of the global pandemic caused by the COVID-19 virus, 3D digitisation of selected museum artefacts is becoming more and more frequent practice, but the vast majority is performed by specialised teams. The paper presents the results of comparative studies of 3D digital models of the same museum artefacts from the Silk Road area generated by two completely different technologies: Structure from Motion (SfM)—a method belonging to the so-called low-cost technologies—and by Structured-light 3D Scanning (3D SLS). Moreover, procedural differences in data acquisition and their processing to generate three-dimensional models are presented. Models built using a point cloud were created from data collected in the Afrasiyab museum in Samarkand (Uzbekistan) during “The 1st Scientific Expedition of the Lublin University of Technology to Central Asia” in 2017. Photos for creating 3D models in SfM technology were taken during a virtual expedition carried out under the “3D Digital Silk Road” program in 2021. The obtained results show that the quality of the 3D models generated with SfM differs from the models from the technology (3D SLS), but they may be placed in the galleries of the vitrual museum. The obtained models from SfM do not have information about their size, which means that they are not fully suitable for archiving purposes of cultural heritage, unlike the models from SLS.

scholarly journals 3D-Volume Rendering of the Pelvis with Emphasis on Paraurethral Structures Based on MRI Scans and Comparisons between 3D Slicer and OsiriX®

2021 ◽  
Vol 45 (3) ◽  
Author(s):  
C. M. Durnea ◽  
S. Siddiqi ◽  
D. Nazarian ◽  
G. Munneke ◽  
P. M. Sedgwick ◽  
...  
Keyword(s):  
Image Processing ◽  
Secondary Analysis ◽  
Three Dimensional ◽  
3D Models ◽  
Clinical Role ◽  
Cross Sectional ◽  
3D Slicer ◽  
Mri Scans ◽  
3D Volume ◽  
Good Agreement

AbstractThe feasibility of rendering three dimensional (3D) pelvic models of vaginal, urethral and paraurethral lesions from 2D MRI has been demonstrated previously. To quantitatively compare 3D models using two different image processing applications: 3D Slicer and OsiriX. Secondary analysis and processing of five MRI scan based image sets from female patients aged 29–43 years old with vaginal or paraurethral lesions. Cross sectional image sets were used to create 3D models of the pelvic structures with 3D Slicer and OsiriX image processing applications. The linear dimensions of the models created using the two different methods were compared using Bland-Altman plots. The comparisons demonstrated good agreement between measurements from the two applications. The two data sets obtained from different image processing methods demonstrated good agreement. Both 3D Slicer and OsiriX can be used interchangeably and produce almost similar results. The clinical role of this investigation modality remains to be further evaluated.

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