3D Measurement of Anatomic Parameters and Development of a Digital Design to Improve the Outcome of Lower-Extremity Surgery

To overcome disadvantages of the older surgical model, we invented a new three-dimensional (3D) correction surgery design after studying computer-aided 3D model analysis. Three-dimensional reconstruction was carried out for computed tomographic (CT) scans of patients with normal bilateral lower extremities; an anatomical model was established; and the normal values of 3D anatomic parameters of the lower-extremity joints were measured with computer assistance. An osteotomy procedure was simulated using a computer, appropriate osteotomy site, and osteotomy angle, and an osteotomy method was selected. Computer-assisted design (CAD) was used to produce an individualized auxiliary osteotomy template for guiding the osteotomy and an auxiliary correction template for guiding correction surgery. Finally, we accurately performed surgery according to the preoperative design. All surgeries were performed successfully and postoperative x-ray films showed satisfactory deformity correction. Computer-aided lower-extremity joint correction surgery is more accurate and convenient than conventional surgery.

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3D Measurement of Anatomic Parameters and Development of a Digital Design to Improve the Outcome of Lower-Extremity Surgery

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.787.947 ◽

2013 ◽

Vol 787 ◽

pp. 947-953

Author(s):

Huan Wen Ding ◽

Qiang Tu ◽

Hong Wang ◽

Hui Liang Liu ◽

Jian Jian Shen ◽

...

Keyword(s):

Lower Extremity ◽

Three Dimensional ◽

Deformity Correction ◽

Digital Design ◽

Osteotomy Site ◽

Computer Assisted ◽

Computed Tomographic ◽

Computer Aided ◽

Dimensional Reconstruction ◽

Correction Surgery

Background: To overcome disadvantages of the older surgical model, we invented a new three-dimensional (3D) correction surgery design after studying computer-aided 3D model analysis. Methods: Three-dimensional reconstruction was carried out for computed tomographic (CT) scans of patients with normal bilateral lower extremities; an anatomical model was established; and the normal values of 3D anatomic parameters of the lower-extremity joints were measured with computer assistance. An osteotomy procedure was simulated using a computer, appropriate osteotomy site, and osteotomy angle, and an osteotomy method was selected. Computer-assisted design (CAD) was used to produce an individualized auxiliary osteotomy template for guiding the osteotomy and an auxiliary correction template for guiding correction surgery. Finally, we accurately performed surgery according to the preoperative design. Results: All surgeries were performed successfully and postoperative x-ray films showed satisfactory deformity correction. Conclusions: Computer-aided lower-extremity joint correction surgery is more accurate and convenient than conventional surgery.

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Three-Dimensional Digital Design for Osteotomy in the Treatment of Congenital Hemivertebra

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.804.167 ◽

2013 ◽

Vol 804 ◽

pp. 167-173

Author(s):

Huan Wen Ding ◽

Guang Wen Yu ◽

Qiang Tu ◽

Jian Jian Shen ◽

Ying Jun Wang

Keyword(s):

Computer Simulation ◽

Internal Fixation ◽

Pedicle Screw ◽

Operative Time ◽

Design Method ◽

Three Dimensional ◽

Digital Design ◽

Computer Assisted ◽

Computer Assisted Design ◽

Computer Aided

To establish a new three-dimensional (3D) digital design method for osteotomy and assess its application value in the surgical treatment of hemivertebrae. Preoperative 3D digital designs for osteotomy of the hemivertebrae were performed, which included computer simulation of the osteotomy and the internal fixation process, and computer-assisted design (CAD) of the templates for osteotomy of the hemivertebrae, pedicle screw positioning, and internal fixation rods. Template-guided osteotomy of the hemivertebrae plus pedicle screw and rod internal fixation were accurately implemented. The preoperative use of this new computer-aided 3D digitized and paperless surgical design can improve the safety, accuracy, and operative time for osteotomy in the treatment of hemivertebrae.

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Three-Dimensional Digital Design for Osteotomy in the Treatment of Congenital Hemivertebra

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.380-384.1760 ◽

2013 ◽

Vol 380-384 ◽

pp. 1760-1764

Author(s):

Huan Wen Ding ◽

Guang Wen Yu ◽

Qiang Tu ◽

Jian Jian Shen ◽

Ying Jun Wang

Keyword(s):

Computer Simulation ◽

Internal Fixation ◽

Pedicle Screw ◽

Operative Time ◽

Design Method ◽

Three Dimensional ◽

Digital Design ◽

Computer Assisted ◽

Computer Assisted Design ◽

Computer Aided

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Computer Assisted Image Reconstruction of Oligomer Structure

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100092323 ◽

1976 ◽

Vol 34 ◽

pp. 472-473

Author(s):

A.M. Jones ◽

A. Max Fiskin

Keyword(s):

Three Dimensional ◽

Depth Of Field ◽

Computer Assisted ◽

Projection Data ◽

Two Dimensional ◽

Single Particles ◽

Dimensional Reconstruction ◽

Computer Assisted Image ◽

The Fourier Transform ◽

Space Approach

If the tilt of a specimen can be varied either by the strategy of observing identical particles orientated randomly or by use of a eucentric goniometer stage, three dimensional reconstruction procedures are available (l). If the specimens, such as small protein aggregates, lack periodicity, direct space methods compete favorably in ease of implementation with reconstruction by the Fourier (transform) space approach (2). Regardless of method, reconstruction is possible because useful specimen thicknesses are always much less than the depth of field in an electron microscope. Thus electron images record the amount of stain in columns of the object normal to the recording plates. For single particles, practical considerations dictate that the specimen be tilted precisely about a single axis. In so doing a reconstructed image is achieved serially from two-dimensional sections which in turn are generated by a series of back-to-front lines of projection data.

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Computer-aided methods for 3-D visualization of serial sections and thick biological specimens

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100129930 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1060-1061

Author(s):

Mark Ellisman ◽

Maryann Martone ◽

Gabriel Soto ◽

Eleizer Masliah ◽

David Hessler ◽

...

Keyword(s):

Alzheimer’S Disease ◽

Alzheimer's Disease ◽

Three Dimensional ◽

Neuritic Plaque ◽

Dimensional Structure ◽

Data Sets ◽

Molecular Physiology ◽

Research Activities ◽

Computer Aided ◽

Dimensional Reconstruction

Structurally-oriented biologists examine cells, tissues, organelles and macromolecules in order to gain insight into cellular and molecular physiology by relating structure to function. The understanding of these structures can be greatly enhanced by the use of techniques for the visualization and quantitative analysis of three-dimensional structure. Three projects from current research activities will be presented in order to illustrate both the present capabilities of computer aided techniques as well as their limitations and future possibilities.The first project concerns the three-dimensional reconstruction of the neuritic plaques found in the brains of patients with Alzheimer's disease. We have developed a software package “Synu” for investigation of 3D data sets which has been used in conjunction with laser confocal light microscopy to study the structure of the neuritic plaque. Tissue sections of autopsy samples from patients with Alzheimer's disease were double-labeled for tau, a cytoskeletal marker for abnormal neurites, and synaptophysin, a marker of presynaptic terminals.

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Computer assisted three-dimensional reconstruction of scene in firearm homicide

Medico-Legal Journal ◽

10.1177/00258172211018359 ◽

2021 ◽

pp. 002581722110183

Author(s):

MA Kislov ◽

M Chauhan ◽

SN Zakharov ◽

SV Leonov ◽

YP Shakiryanova

Keyword(s):

Causes Of Death ◽

Scientific Evidence ◽

Three Dimensional ◽

Crime Scene ◽

Forensic Sciences ◽

Computer Assisted ◽

Three Dimensional Reconstruction ◽

Scientific Model ◽

Dimensional Reconstruction ◽

Promising Application

Worldwide advances in computer techniques are not yet recognised in the practice of forensic medicine. A promising application is their use in making a three-dimensional reconstruction of the crime scene. This study analyses this technique in a homicide by firearm. Queries regarding the direction and number of shots, position of the victim inside the car when shot at and presence of the accused at the crime scene were answered by a scientific model. Similar reconstruction of the scene, nailing the accused in a heinous crime, has not previously been reported as a study or a case. The paper anticipates impetus to the growth of literature in criminology and forensic sciences. It will also expedite the delivery of justice based on scientific evidence in controversial causes of death.

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