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3 dimensional reconstruction

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https://www.readbyqxmd.com/read/28719987/corrective-osteotomy-of-malunited-diaphyseal-fractures-of-the-forearm-simplified-using-3-dimensional-ct-data-proposal-of-our-simple-strategy-through-case-presentation
#1
Yoshitaka Hamada, Hiroyuki Gotani, Kousuke Sasaki, Yoshitaka Tanaka, Hiroshi Egawa, Thepparat Kanchanathepsak
BACKGROUND: Reconstruction of malunited diaphyseal fractures of the forearm is one of the most difficult treatments due to its complicated structure. Widespread usage of Digital Imaging and Communications in Medicine (DICOM) data of 3-dimensional (3D) computed tomography (CT) and 3D printing can make estimating the true plane of the deformity easy. METHODS: A 21-year-old man with limited supination due to left forearm nonunion deformity initially treated by locking plate fixation was referred to our hospital...
March 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28716695/the-nugget-design-a-modified-segmental-gracilis-free-flap-for-small-sized-defect-reconstruction-on-the-lower-extremity
#2
M Tremp, C M Oranges, W J Wang, R Wettstein, Y X Zhang, D J Schaefer, D F Kalbermatten
BACKGROUND: Little attention has been given to the segmental free gracilis muscle flap supplied by secondary proximal pedicles. We introduce a technical refinement for small-sized three-dimensional defect reconstruction on the foot. METHODS: Between November 2013 and August 2016, three patients with a mean age of 66 years (range 47-70 years) were included. A segmental gracilis free flap supplied by the most proximal secondary pedicle was harvested according to a modified "nugget design" to treat small-sized defects on the lower extremity requiring dead space reconstruction...
July 8, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28713738/three-dimensional-planning-and-reconstruction-of-the-mandible-in-children-with-craniofacial-microsomia-type-iii-using-costochondral-grafts
#3
Omri Emodi, Yair Israel, Michal Even Almos, Dror Aizenbud, John A Van Aalst, Adi Rachmiel
BACKGROUND: In craniofacial microsomia (CFM) Type III patients, autogenous costochondral grafts (CCG) are conventionally used for the reconstruction of the ramus and condyle. The aim of this study was to describe the use of CCG in children with CFM in terms of outcomes, growth patterns, and complications. MATERIALS AND METHODS: This is a retrospective study of nine, aged 4-12 years, patients with CFM Type III, who underwent reconstruction of the mandibular ramus condyle unit by CCG...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28708652/clinical-application-of-multimodal-neuronavigation-system-in-neuroendoscope-assisted-skull-base-chordoma-resection
#4
Xin Wang, Long Li, Yibao Wang, Jinqu Hu, Jinpeng Zhou, Zhitao Jing, Anhua Wu
Skull base chordoma is a rare tumor arising from embryonic remnants of the notochord with invasive potential. Due to the destruction of osseous landmarks and invasion of surrounding structures, surgical resection is challenging. The authors explored the clinical value of a multimodal neuronavigation system in skull base chordoma resection using a neuroendoscope. Between January 2012 and January 2016, the authors utilized neuroendoscopy to excise skull base chordoma in 93 patients. The authors performed 45 operations assisted by multimodal neuronavigation (neuronavigation group) and 48 without intraoperative imaging guidance (control group)...
July 13, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28708642/a-novel-rhinoplasty-sculpture-technique-using-ancient-chinese-architectural-technology
#5
Melia Bogari, Andy Tan, Li Lin, Zin Mar Aung, Yu Xin, Haisong Xu, Gang Chai, Yan Zhang
Rhinoplasty is one of the most delicate procedures in plastic and reconstructive surgery. Precision in every millimeter is vital in ensuring a better quality of surgical outcome. Many methods have been developed to fulfill this requirement. One such method is an implant, whether autogenous or artificial. Artificial implants involve several surgical complications, such as recipient rejection of implant material, infections, and rigid feel of the nasal tip. Hence, autogenous implants were eventually more widely applied, with material being obtained from the septum, concha, or rib cartilages...
July 13, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28707531/third-version-of-vendor-specific-model-based-iterative-reconstruction-veo-3-0-evaluation-of-ct-image-quality-in-the-abdomen-using-new-noise-reduction-presets-and-varied-slice-optimization
#6
Morgan E Telesmanich, Corey T Jensen, Jose L Enriquez, Nicolaus A Wagner-Bartak, Xinming Liu, Ott Le, Wei Wei, Adam G Chandler, Eric P Tamm
OBJECTIVE: To qualitatively and quantitatively compare abdominal CT images reconstructed with a new version of model-based iterative reconstruction (Veo 3.0; GE Healthcare) utilizing varied presets of resolution preference, noise reduction, and slice optimization. METHODS: This retrospective study was approved by our IRB and was HIPAA compliant. The raw data from 30 consecutive patients who had undergone CT abdomen scanning were used to reconstruct 4 clinical presets of 3...
July 14, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28704637/evaluation-of-the-mandibular-lingual-canal-and-anterior-loop-length-to-minimize-complications-associated-with-anterior-mandibular-surgeries-in-the-taiwanese-population-a-cone-beam-computed-tomography-study
#7
Chih-Yang Kung, Yuan-Min Wang, Chiu-Po Chan, Yuh-Ren Ju, Whei-Lin Pan
PURPOSE: This retrospective study evaluated the localization, incidence, and dimensions of the mandibular lingual canal and the anterior loop in the Taiwanese population using the simulation and visual interpretation of cone-beam computed tomography to minimize complications during symphysis block surgical procedures. MATERIALS AND METHODS: The sample population consisted of 215 patients (105 men and 110 women; mean age, 57 yr). The median lingual canal, symphysis bone thickness, and anterior loop length were defined and calculated using cone-beam computed tomography and 3-dimensional reconstructed images...
June 23, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28702749/evaluation-of-different-surgical-methods-in-treating-recurrent-patella-dislocation-after-three-dimensional-reconstruction
#8
Hao Du, Xiao-Xiao Tian, Fa-Qi Guo, Xiang-Ming Li, Tao-Tao Ji, Bin Li, Tong-Sen Li
PURPOSE: Recurrent patella dislocation (RPD) is the most common complication of patellar instability. The effects of different surgical techniques on the outcome of RPD treatments remain unclear. This study was conducted to compare the effects of three surgical techniques in treating RPD by three-dimensional (3D) reconstruction from computed tomography (CT) scans. METHODS: Sixty-eight patients with RPD and no previous surgical treatments who attended our hospital between October 2010 and 2013 were enrolled and randomly assigned into three groups: (1) medial patellofemoral ligament (MPFL) reconstruction and medial patellar retinaculum (MPR) plication group; (2) lateral patellar retinaculum (LPR) release and MPR plication group; and (3) MPFL reconstruction and LPR release group...
July 12, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28696034/fast-non-invasive-functional-diffuse-optical-tomography-for-brain-imaging
#9
Xianjin Dai, Tao Zhang, Hao Yang, Jianbo Tang, Paul R Carney, Huabei Jiang
Advances in epilepsy studies have shown that specific changes in hemodynamics precede and accompany seizure onset and propagation. However, it has been challenging to non-invasively detect these changes in real-time and in humans, due to the lack of fast functional neuroimaging tools. Here, we present a functional diffuse optical tomography (DOT) method with the guidance of an anatomical human-head atlas for three-dimensionally mapping the brain in real time. Central to our DOT system is a human head interface coupled with a technique that can incorporate topological information of the brain surface into the DOT image reconstruction...
July 11, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28690923/voxel-placement-precision-for-gaba-edited-magnetic-resonance-spectroscopy
#10
Xue Bai, Ashley D Harris, Tao Gong, Nicolaas A J Puts, Guangbin Wang, Michael Schär, Peter B Barker, Richard A E Edden
The purpose of the present study was to assess the reproducibility of voxel placement for GABA-edited MRS. GABA-edited MRS data were acquired in 13 healthy volunteers from (3 cm)(3) voxel; and within the same session a second acquisition was independently prescribed. A three-dimensional voxel mask image was reconstructed in T1-image-space using the SVMask tool (in house software). Reproducibility of voxel placement was assessed using the Dice overlap coefficient, both within-subject and between-subject following co-registration of T1 images and transformation of voxel mask images to standard space...
March 2017: Open J Radiol
https://www.readbyqxmd.com/read/28689482/a-semiautomated-method-for-measuring-the-3-dimensional-fabric-to-renal-artery-distances-to-determine-endograft-position-after-endovascular-aneurysm-repair
#11
Richte C L Schuurmann, Simon P Overeem, Kenneth Ouriel, Cornelis H Slump, William D Jordan, Bart E Muhs, Jean-Paul P M de Vries
PURPOSE: To report a methodology for 3-dimensional (3D) assessment of the stent-graft deployment accuracy after endovascular aneurysm repair (EVAR). METHODS: A methodology was developed and validated to calculate the 3D distances between the endograft fabric and the renal arteries over the curve of the aorta. The shortest distance between one of the renal arteries and the fabric (SFD) and the distance from the contralateral renal artery to the fabric (CFD) were determined on the first postoperative computed tomography (CT) scan of 81 elective EVAR patients...
July 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28688825/three-dimensional-bio-printed-scaffold-sleeves-with-mesenchymal-stem-cells-for-enhancement-of-tendon-to-bone-healing-in-anterior-cruciate-ligament-reconstruction-using-soft-tissue-tendon-graft
#12
Sin Hyung Park, Yeong-Jin Choi, Sang Won Moon, Byung Hoon Lee, Jin-Hyung Shim, Dong-Woo Cho, Joon Ho Wang
PURPOSE: To investigate the efficacy of the insertion of 3-dimensional (3D) bio-printed scaffold sleeves seeded with mesenchymal stem cells (MSCs) to enhance osteointegration between the tendon and tunnel bone in anterior cruciate ligament (ACL) reconstruction in a rabbit model. METHODS: Scaffold sleeves were fabricated by 3D bio-printing. Before ACL reconstruction, MSCs were seeded into the scaffold sleeves. ACL reconstruction with hamstring tendon was performed on both legs of 15 adult rabbits (aged 12 weeks)...
July 5, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28688157/the-application-of-3-dimensional-printing-for-preoperative-planning-in-oral-and-maxillofacial-surgery-in-dogs-and-cats
#13
Jenna N Winer, Frank J M Verstraete, Derek D Cissell, Steven Lucero, Kyriacos A Athanasiou, Boaz Arzi
OBJECTIVE: To describe the application of 3-dimensional (3D) printing in advanced oral and maxillofacial surgery (OMFS) and to discuss the benefits of this modality in surgical planning, student and resident training, and client education. STUDY DESIGN: Retrospective case series. ANIMALS: Client-owned dogs (n = 28) and cats (n = 4) with 3D printing models of the skulls. METHODS: The medical records of 32 cases with 3D printing prior to major OMFS were reviewed...
July 8, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28687771/prominent-metallic-surface-conduction-and-the-singular-magnetic-response-of-topological-dirac-fermion-in-three-dimensional-topological-insulator-bi1-5sb0-5te1-7se1-3
#14
Prithwish Dutta, Arnab Pariari, Prabhat Mandal
We report semiconductor to metal-like crossover in the temperature dependence of resistivity (ρ) due to the switching of charge transport from bulk to surface channel in three-dimensional topological insulator Bi1.5Sb0.5Te1.7Se1.3. Unlike earlier studies, a much sharper drop in ρ(T) is observed below the crossover temperature due to the dominant surface conduction. Remarkably, the resistivity of the conducting surface channel follows a rarely observable T (2) dependence at low temperature, as predicted theoretically for a two-dimensional Fermi liquid system...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28687216/left-ventricular-volume-measurements-with-free-breathing-respiratory-self-gated-3-dimensional-golden-angle-radial-whole-heart-cine-imaging-feasibility-and-reproducibility
#15
Karen Holst, Martin Ugander, Andreas Sigfridsson
PURPOSE: To develop and evaluate a free breathing respiratory self-gated isotropic resolution technique for left ventricular (LV) volume measurements. METHODS: A 3D radial trajectory with double golden-angle ordering was used for free-running data acquisition during free breathing in 9 healthy volunteers. A respiratory self-gating signal was extracted from the center of k-space and used with the electrocardiogram to bin all data into 3 respiratory and 25 cardiac phases...
July 5, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28686800/accelerated-three-dimensional-multispectral-mri-with-robust-principal-component-analysis-for-separation-of-on-and-off-resonance-signals
#16
Evan Levine, Kathryn Stevens, Christopher Beaulieu, Brian Hargreaves
PURPOSE: To enable highly accelerated distortion-free MRI near metal by separating on- and off-resonance to exploit the redundancy of slice-phase encoding for the dominant on-resonance component. METHODS: Multispectral MRI techniques resolve off-resonance distortions by a combination of limited excitation bins and additional encoding. Inspired by robust principal component analysis, a novel compact representation of multispectral images as a sum of rank-one and sparse matrices corresponding to on- and off-resonance respectively is described...
July 7, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28682639/in-vivo-measurements-of-the-ischiofemoral-space-in-recreationally-active-participants-during-dynamic-activities-a-high-speed-dual-fluoroscopy-study
#17
Penny R Atkins, Niccolo M Fiorentino, Stephen K Aoki, Christopher L Peters, Travis G Maak, Andrew E Anderson
BACKGROUND: Ischiofemoral impingement (IFI) is a dynamic process, but its diagnosis is often based on static, supine images. PURPOSE: To couple 3-dimensional (3D) computed tomography (CT) models with dual fluoroscopy (DF) images to quantify in vivo hip motion and the ischiofemoral space (IFS) in asymptomatic participants during weightbearing activities and evaluate the relationship of dynamic measurements with sex, hip kinematics, and the IFS measured from axial magnetic resonance imaging (MRI)...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28682243/orbit-segmentation-by-surface-reconstruction-with-automatic-sliced-vertex-screening
#18
Tai Chiu Hsung, John Lo, Mei-Man Chong, Tazuko K Goto, Lim Cheung
In segmentation of human orbit in computer tomography (CT) images, traditional approaches are slice-by-slice manual editing or shape interpolation with selected slices interactively. It is not only time consuming, but also inefficient, exhibits inter-operator variability and repeatability problems. In this study, we aim to develop a computational approach to the segmentation of orbits. The first step is to perform Hounsfield unit thresholding to segment the bony structure around the orbit. Then a three dimensional (3D) mesh model is generated...
June 29, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28680711/three-dimensional-measurement-of-periodontal-surface-area-for-quantifying-inflammatory-burden
#19
Sa-Beom Park, So-Youn An, Won-Jeong Han, Jong-Tae Park
PURPOSE: Measurement of the root surface area (RSA) is important in periodontal treatment and for the evaluation of periodontal disease as a risk factor for systemic disease. The aim of this study was to measure the RSA at 6 mm below the cementoenamel junction (CEJ) using the Mimics software (Materialise, Leuven, Belgium). METHODS: We obtained cone-beam computed tomography (CBCT) data from 33 patients who had visited the Department of Oral and Maxillofacial Radiology of Dankook University Dental Hospital...
June 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28678124/an-in-vivo-simulation-of-isometry-of-the-anterolateral-aspect-of-the-healthy-knee
#20
Willem A Kernkamp, Samuel K Van de Velde, Tsung-Yuan Tsai, Ewoud R A van Arkel, Peter D Asnis, Rob G H H Nelissen, Robert F LaPrade, Bertram Zarins, Guoan Li
BACKGROUND: To assess the isometry of theoretical lateral extra-articular reconstruction (LER), we evaluated theoretical grafts attached to various points on the lateral femoral condylar area and to either Gerdy's tubercle or the anatomic attachment site of the anterolateral ligament to the tibia. METHODS: In 18 subjects, healthy knees with no history of either injury or surgery involving the lower extremity were studied. The subjects performed a sit-to-stand motion (from approximately 90° of flexion to full extension), and each knee was studied using magnetic resonance and dual fluoroscopic imaging techniques...
July 5, 2017: Journal of Bone and Joint Surgery. American Volume
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