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https://www.readbyqxmd.com/read/28525474/anatomy-of-lamina-in-the-subaxial-cervical-spine-with-the-special-reference-to-translaminar-screws-ct-and-cadaveric-analysis-with-screw-trajectory-simulation
#1
Woojin Cho, Jason T Le, Adam L Shimer, Brian C Werner, John A Glaser, Francis H Shen
STUDY DESIGN: A cadaveric study. SUMMARY OF BACKGROUND DATA: Translaminar screws were initially developed for C2 fixation. Since then, their usage has expanded to include the subaxial cervical spine, and thoracic and lumbar spine. To the best of our knowledge, special anatomy for inserting translaminar screws in the subaxial cervical spine has not been studied. OBJECTIVE: To report the special anatomy for inserting translaminar screws in the subaxial cervical spine...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28523171/uniportal-video-assisted-thoracoscopic-combined-segmentectomy-for-lung-cancer-with-incomplete-fissure
#2
Ding-Pei Han, Kai Chen, Ya-Jie Zhang, Dan-Nong He, He-Cheng Li
This video clip demonstrated a performance of uniportal video-assisted thoracoscopic surgery combined segmentectomy. The patient had a potential invasive nodule located near the bifurcation of right bronchus, 3-dimensional reconstruction image showed the fissure between posterior segment of upper lobe and superior segment of lower lobe was incomplete. An up-to-down approach was applied in this operation with the en bloc resection of the two segments. Pathological report was adenocarcinoma with negative margin (TNM stage: T1aN0M0)...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28516727/non-invasive-longitudinal-monitoring-of-angiogenesis-in-a-murine-full-thickness-cutaneous-wound-healing-model-using-high-resolution-three-dimensional-ultrasound-imaging
#3
K Mukai, W Zhu, Y Nakajima, M Kobayashi, T Nakatani
BACKGROUND/PURPOSE: The aim of this study was to evaluate the longitudinal monitoring of angiogenesis in a murine full-thickness cutaneous wound healing model using high-resolution three-dimensional (3D) ultrasound imaging. METHODS: Two C57BL/6 mice were used. Two-dimensional (2D) ultrasound images with the Color Doppler mode were acquired at regular spatial intervals on day 9, 11, and 14 after wounding. 3D ultrasound images were processed by reconstructing the 2D ultrasound image sequences...
May 17, 2017: Skin Research and Technology
https://www.readbyqxmd.com/read/28513922/impact-of-sampling-interval-in-training-data-acquisition-on-intrafractional-predictive-accuracy-of-indirect-dynamic-tumor-tracking-radiotherapy
#4
Nobutaka Mukumoto, Mitsuhiro Nakamura, Mami Akimoto, Yuki Miyabe, Kenji Yokota, Yukinori Matsuo, Takashi Mizowaki, Masahiro Hiraoka
PURPOSE: To explore the effect of sampling interval of training data acquisition on the intrafractional prediction error of surrogate signal-based dynamic tumor-tracking using a gimbal-mounted linac. MATERIALS AND METHODS: Twenty pairs of respiratory motions were acquired from 20 patients (ten lung, five liver, and five pancreatic cancer patients) who underwent dynamic tumor-tracking with the Vero4DRT. First, respiratory motions were acquired as training data for an initial construction of the prediction model before the irradiation...
May 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28510021/molecular-assembly-and-structure-of-the-bacteriophage-t4-tail
#5
REVIEW
Fumio Arisaka, Moh Lan Yap, Shuji Kanamaru, Michael G Rossmann
The tail of bacteriophage T4 undergoes large structural changes upon infection while delivering the phage genome into the host cell. The baseplate is located at the distal end of the contractile tail and plays a central role in transmitting the signal to the tail sheath that the tailfibers have been adsorbed by a host bacterium. This then triggers the sheath contraction. In order to understand the mechanism of assembly and conformational changes of the baseplate upon infection, we have determined the structure of an in vitro assembled baseplate through the three-dimensional reconstruction of cryo-electron microscopy images to a resolution of 3...
December 2016: Biophysical Reviews
https://www.readbyqxmd.com/read/28509695/a-novel-augmented-reality-based-navigation-system-in-perforator-flap-transplantation-a-feasibility-study
#6
Taoran Jiang, Ming Zhu, Tao Zan, Bin Gu, Qingfeng Li
BACKGROUND: In perforator flap transplantation, dissection of the perforator is an important but difficult procedure because of the high variability in vascular anatomy. Preoperative imaging techniques could provide substantial information about vascular anatomy; however, it cannot provide direct guidance for surgeons during the operation. In this study, a navigation system (NS) was established to overlie a vascular map on surgical sites to further provide a direct guide for perforator flap transplantation...
May 15, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28508393/reversed-single-string-technique-for-coronary-bifurcation-stenting-first-report-of-case-demonstrations-in-vitro
#7
Julien Adjedj, Gabor G Toth, Mariano Pellicano, William Wijns
OBJECTIVES: This work reports the concept and the practical feasibility of Reversed Single String bifurcation stenting technique by demonstrating three in vitro cases. BACKGROUND: Provisional T stenting is the most used interventional technique to treat coronary bifurcation lesions. However, after main branch (MB) stenting, treatment of the side branch (SB) may become indicated to provide a good final result. Currently applied methods all have their structural limitations with respect to wall coverage, multiple strut layers, poor apposition rate...
May 16, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28503136/a-quantitative-golgi-study-of-dendritic-morphology-in-the-mice-striatal-medium-spiny-neurons
#8
Ivana Bicanic, Ana Hladnik, Zdravko Petanjek
In this study we have provided a detailed quantitative morphological analysis of medium spiny neurons (MSNs) in the mice dorsal striatum and determined the consistency of values among three groups of animals obtained in different set of experiments. Dendritic trees of 162 Golgi Cox (FD Rapid GolgiStain Kit) impregnated MSNs from 15 adult C57BL/6 mice were 3-dimensionally reconstructed using Neurolucida software, and parameters of dendritic morphology have been compared among experimental groups. The parameters of length and branching pattern did not show statistically significant difference and were highly consistent among groups...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28502990/short-read-mapping-an-algorithmic-tour
#9
Stefan Canzar, Steven L Salzberg
Ultra-high-throughput next-generation sequencing (NGS) technology allows us to determine the sequence of nucleotides of many millions of DNA molecules in parallel. Accompanied by a dramatic reduction in cost since its introduction in 2004, NGS technology has provided a new way of addressing a wide range of biological and biomedical questions, from the study of human genetic disease to the analysis of gene expression, protein-DNA interactions, and patterns of DNA methylation. The data generated by NGS instruments comprise huge numbers of very short DNA sequences, or 'reads', that carry little information by themselves...
March 2017: Proceedings of the IEEE
https://www.readbyqxmd.com/read/28499808/high-contrast-high-resolution-imaging-of-posttraumatic-mandibular-nerve-by-3dac-propeller-magnetic-resonance-imaging-correlation-with-the-severity-of-sensory-disturbance
#10
Makoto Terumitsu, Hitoshi Matsuzawa, Kenji Seo, Masaki Watanabe, Shigenobu Kurata, Akiko Suda, Tsutomu Nakada
OBJECTIVE: Magnetic resonance neurography reveals abnormal morphologies of regenerated nerves and overgrown connective tissue in injured trigeminal nerves, suggesting neuroma formation. We hypothesized that such deformities and scar formation contribute to pain symptoms. STUDY DESIGN: High-contrast high-resolution magnetic resonance imaging was utilized to evaluate the inferior alveolar nerve and lingual nerve following traumatic injury in 19 patients. The relationship between the morphologic classification and severity of the sensory disorder was assessed...
March 14, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28498293/what-is-the-actual-3d-representation-of-the-rib-vertebra-angle-difference-mehta-s-angle
#11
Rob C Brink, Tom P C Schlösser, Marijn van Stralen, Koen L Vincken, Moyo C Kruyt, Winnie C W Chu, Jack C Y Cheng, René M Castelein
STUDY DESIGN: Cross-sectional study. OBJECTIVE: To establish the relevance of the conventional two-dimensional (2D) RVAD and the relationship with the complex three-dimensional (3D) apical morphology in scoliosis. SUMMARY OF BACKGROUND DATA: The rib vertebra angle difference (RVAD, also known as Mehta's angle) describes apical rib asymmetry on conventional radiographs and was introduced as a prognostic factor for curve severity in early onset scoliosis, and later applied to other types of scoliosis as well...
May 11, 2017: Spine
https://www.readbyqxmd.com/read/28494943/kinematic-analysis-of-the-scaphoid-using-gated-four-dimensional-ct
#12
I S Mat Jais, S C Tay
AIM: To investigate the kinematics of the scaphoid while the wrist was in radioulnar motion using gated four-dimensional computed tomography (4DCT) imaging. MATERIALS AND METHODS: Six cadaveric wrist specimens were scanned in the following order of capsulotomy and ligament sectioning: (1) ligaments intact, (2) capsulotomy, (3) scapholunate ligament division, and lastly, (4) lunotriquetral ligament division. A three-dimensional model was then reconstructed to analyse the translation and angular displacements of the scaphoid...
May 7, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28489065/sound-source-localization-using-non-conformal-surface-sound-field-transformation-based-on-spherical-harmonic-wave-decomposition
#13
Lanyue Zhang, Dandan Ding, Desen Yang, Jia Wang, Jie Shi
Spherical microphone arrays have been paid increasing attention for their ability to locate a sound source with arbitrary incident angle in three-dimensional space. Low-frequency sound sources are usually located by using spherical near-field acoustic holography. The reconstruction surface and holography surface are conformal surfaces in the conventional sound field transformation based on generalized Fourier transform. When the sound source is on the cylindrical surface, it is difficult to locate by using spherical surface conformal transform...
May 10, 2017: Sensors
https://www.readbyqxmd.com/read/28488804/three-dimensional-shape-and-surface-features-distinguish-multiple-sclerosis-lesions-from-nonspecific-white-matter-disease
#14
Braeden D Newton, Katy Wright, Mandy D Winkler, Francesca Bovis, Masaya Takahashi, Ivan E Dimitrov, Maria Pia Sormani, Marco C Pinho, Darin T Okuda
BACKGROUND AND PURPOSE: There remains a need to further refine the ability of clinicians to differentiate multiple sclerosis (MS) from other disease etiologies. Here, we illustrate the value of 3-dimensional (3D) geometric shape and surface lesion characteristics between disease states. METHODS: Standardized 3-Tesla 3D brain magnetic resonance imaging studies were performed on enrolled MS and nonspecific white matter (NSWM) patients. Focal supratentorial lesions were identified, reconstructed using maximum intensity projection, manually segmented, and 3D printed...
May 10, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28486274/a-novel-method-for-assessing-lamina-cribrosa-structure-ex-vivo-using-anterior-segment-enhanced-depth-imaging-optical-coherence-tomography
#15
Jason L Chien, Mark P Ghassibi, Pooja Mahadeshwar, Pengcheng Li, Jeffrey M Liebmann, Robert Ritch, Tatyana Milman, Sung Chul Park
PURPOSE: The purpose of this study is to investigate the use of anterior segment enhanced depth imaging (EDI) optical coherence tomography (OCT) for ex vivo lamina cribrosa (LC) imaging. MATERIALS AND METHODS: After removing anterior segment and vitreous, the optic nerve head (ONH) tissue of porcine eyes was placed on a customized eye holder for imaging. Serial EDI OCT B-scans (interval, ∼35 μm) of the ONH were obtained using anterior segment module of spectral-domain OCT...
May 8, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28483474/comparison-between-flat-panel-volume-computed-tomography-and-histologic-assessments-of-bone-invasion-of-maxillofacial-tumors-utility-of-an-instantaneous-radiologic-diagnostic-tool
#16
Heidrun Schaaf, Takwa Wahab-Göthe, Heiko Kerkmann, Philipp Streckbein, Martin Obert, Joern Pons-Kuehnemann, Melanie Ahrens, Hans-Peter Howaldt, Sameh Attia
OBJECTIVE: The aim of this study was to compare the accuracy of flat-panel volume computed tomography (fpVCT) to histopathologic evaluation of excised tumors of the jaws in the detection of the degree of tumor infiltration, the presence of tumor at the resection margins, and the sizes of lesions. STUDY DESIGN: This preliminary study included 47 patients undergoing jaw resection for tumor invasion of bone. The specimens were examined by histology and 3-dimensional fpVCT, and the parameters of bone infiltration, resection margins, and tumor size were determined...
March 24, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28483229/use-of-three-dimensional-cad-cam-assisted-virtual-surgical-simulation-and-planning-in-the-pediatric-craniofacial-population
#17
Rachel Gray, Alexander Gougoutas, Vinh Nguyen, Jesse Taylor, Nicholas Bastidas
OBJECTIVE: Virtual Surgical Planning (VSP) and computer-aided design/computer-aided manufacturing (CAD/CAM) have recently helped improve efficiency and accuracy in many different craniofacial surgeries. Research has mainly focused on the use in the adult population with the exception of the use for mandibular distractions and cranial vault remodeling in the pediatric population. This study aims to elucidate the role of VSP and CAD/CAM in complex pediatric craniofacial cases by exploring its use in the correction of midface hypoplasia, orbital dystopia, mandibular reconstruction, and posterior cranial vault expansion...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28478901/three-dimensional-quantitative-analysis-of-humeral-head-and-glenoid-bone-defects-with-recurrent-glenohumeral-instability
#18
Noboru Matsumura, Satoshi Oki, Masateru Kitashiro, Mayu Minemoto, Takeru Ichikawa, Morio Matsumoto, Masaya Nakamura, Takeo Nagura
BACKGROUND: Although bone defects of the humeral head and glenoid could affect glenohumeral instability, bone loss has not been sufficiently evaluated. The purpose of this study was to quantify bone defects 3-dimensionally in cases with glenohumeral instability. METHODS: Three-dimensional surface models of bilateral proximal humeri and glenoids were reconstructed from computed tomography scans of 90 patients with symptomatic, unilateral, recurrent glenohumeral instability...
May 3, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28478896/osteochondritis-dissecans-of-the-capitellum-lesion-size-and-pattern-analysis-using-quantitative-3-dimensional-computed-tomography-and-mapping-technique
#19
Rens Bexkens, Jacobien H Oosterhoff, Tsung-Yuan Tsai, Job N Doornberg, Michel P J van den Bekerom, Denise Eygendaal, Luke S Oh
BACKGROUND: The goals of this study were to evaluate the reliability of a quantitative 3-dimensional computed tomography (Q3DCT) technique for measurement of the capitellar osteochondritis dissecans (OCD) surface area, to analyze OCD distribution using a mapping technique, and to investigate associations between Q3DCT lesion quantification and demographic characteristics and/or clinical examination findings. METHODS: We identified patients with capitellar OCD who presented to our orthopedic sports medicine practice between January 2001 and January 2016 and who had undergone a preoperative computed tomography scan (slice thickness ≤1...
May 3, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28474019/direct-observation-of-active-material-interactions-in-flowable-electrodes-using-x-ray-tomography
#20
Kelsey B Hatzell, Jens Eller, Samantha L Morelly, Maureen H Tang, Nicolas J Alvarez, Yury Gogotsi
Understanding electrical percolation and charging mechanisms in electrochemically active biphasic flowable electrodes is critical for enabling scalable deionization (desalination) and energy storage. Flowable electrodes are dynamic material systems which store charge (remove ions) and have the ability to flow. This flow process can induce structural changes in the underlying material arrangement and result in transient and non-uniform material properties. Carbon-based suspensions are opaque, multi-phase, and three dimensional, and thus prior characterization of the structural properties has been limited to indirect methods (electrochemical and rheology)...
May 5, 2017: Faraday Discussions
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