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Showing 1 to 19 of 19 for “"Qct"”.
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Prognostication and disease monitoring in fibrotic interstitial lung disease
… The use of quantitative computed tomography (qCT) to analyse high resolution CT (HRCT) scans may enable more accurate prognostication and disease monitoring than current routine practice. qCT work to date has identified the pulmonary vasculature as a potential radiomic biomarker to address …
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Validation of Subject Specific Computed Tomography-based Finite Element Models of the Human Proximal Tibia using Full-field Experimental Displacement Measurements from Digital Volume Correlation
… computed tomography-based finite element (QCT-FE) modeling is a computational tool for predicting bone’s response to applied load, and is used by musculoskeletal researchers to better understand bone mechanics and their role in joint health. Decisions made at the modeling stage, such as the …
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Assessment of Human Alveolar Bone Density by Using Volumetric CT Machine
… to those of quantitative computed tomography (QCT) and subjective bone density evaluation. Sixty-two designated implant sites in 9 human cadavers jaws were used. Indicator rods, 2 mm in diameter, were placed in all sites. CT images representing 1 mm bucco-lingual slices immediately mesial and …
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ΣΥΜΒΟΛΗ ΤΗΣ ΠΟΣΟΤΙΚΗΣ ΥΠΟΛΟΓΙΣΤΙΚΗΣ ΤΟΜΟΓΡΑΦΙΑΣ ΣΤΗ ΜΕΛΕΤΗ ΤΟΥ ΜΕΤΑΒΟΛΙΣΜΟΥ ΤΩΝ ΟΣΤΩΝ: ΤΕΧΝΙΚΗ ΚΑΙ ΚΛΙΝΙΚΑ ΑΠΟΤΕΛΕΣΜΑΤΑ
A SINGLE KVP QCT TECHNIQUE WAS DEVELOPED USING K2HPO4 SOLUTIONS AS REFERENCE PHANTOMS. THE BONE MINERAL DENSITY (BMD) OF 5 CM3 OF PURELY SPINAL TRABECULAR BONE WAS MEASURED. DOSIMETRIC DATA WITH LIF THERMOLUMINSCENT DOSIMETRES SHOWED THAT THE EFFECTIVE EQUIVALENT DOSE OF THE EXAMINATION IS 370 MSV …
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Reduced-order model framework for thermochemical non-equilibrium hypersonic flows
… the model using the quasi-classical trajectory (QCT) method. This bypasses the need to compute StS kinetic data for 10^15 reactions resulting from the interaction between two nitrogen molecules, an impossible task. The model reduction framework, called the multi-group maximum-entropy …
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Automated Modelling of Cortical Bone from Clinical CT
… Its performance is assessed using simulated QCT data from three simulated phantoms with differing bone architecture, and two paired datasets of ex-vivo QCT and HR-pQCT scans across the proximal femur and the lumbar spine. The simulated data allows for inaccuracies in CBM measurements caused …
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Localizing longitudinal changes in volumetric bone mineral density after acute knee injury using voxel-based morphometry
… dual energy quantitative computed tomography; DE-QCT) that capture bone mineral density (BMD). Voxelbased morphometry (VBM) can provide a comprehensive assessment of the entire bone structure through voxel-by-voxel comparisons, revealing both spatial and temporal patterns in BMD changes. The aim …
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Significancer of Osteoporosis in Facial Bone Density using the Computed Tomography Scan
… of osteoporosis in the mid-facial bones using QCT scans.
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Untersuchungen zur vollständigen Knochenmineralisation am teilosteotomierten Oberkiefer beim Neuseeländer-Kaninchen
… Medizintechnik, Pforzheim) bestimmt. Dieser QCT errechnet mit Hilfe eines volumetrischen Modells die Knochendichte in mg /cm3. In der Auswertung ergab sich für die Gruppe ohne Trepanationsbohrung ein signifikant höherer Wert der Knochenmineraldichte (p< 0,05) oberhalb eines Schwellenwertes …
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Treatment response using CT-based rigidity analysis in an animal model of lytic musculoskeletal lesions subjected to systemic therapy
… Paclitaxel therapies. Using computed tomography (QCT)-based analysis to calculate the load bearing capacity of bone infiltrated with metastatic breast carcinoma, fracture risk threshold was predicted using Computed Topography Rigidity Analysis (CTRA) with 100% sensitivity and 90% specificity. The …
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Internal energy relaxation in nitrogen plasmas
… composed of electrons and nitrogen atoms. The QCT (Quasi-Classical Trajectory) model recently developed at NASA Ames Research Center is used to study energy transfers and population distribution of nitrogen molecules due to collisions with atoms. An ab-initio model developed at the University …
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SEMICLASSICAL APPROACHES FOR RATE CONSTANT CALCULATIONS AND VIBRATIONAL SPECTROSCOPY
… del metodo di Traiettoria Quasi-Classica (QCT) di simulare spettri di potenza vibrazionali. Vengono infatti presentati i risultati della nostra partecipazione alla sfida internazionale lanciata dal gruppo tedesco del prof. Suhm sulla simulazione di spettri di molecole organiche monoidrate. …
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Das ovariektomierte und glukokortikoid-behandelte Schaf als Großtiermodell für die Osteoporoseforschung
… and the load-bearing skeleton. Peripheral QCT was employed to determine the different respons es of trabecular and integral bone. High-resolution µCT-images allowed the evaluation of precise morphometrical parameters. Histomorphometric analyses provided information about newly formed …
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Machine learning and uncertainty quantification framework for predictive ab initio Hypersonics
… propagated via quasi-classical trajectory (QCT) and master equation calculations by combining high fidelity calculations and reduced order modeling. In this way, the PES contribution to the uncertainty on predefined quantities of interest (QoIs) is explicitly determined. This study is done …
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Development of physical models for the mesoscopic simulation of gas-surface interactions
… dynamics /Quasi-classical trajectory (MD-QCT) simulations and molecule-surface scattering (MSS) theory are used. The system of interest in this work is the gas-surface interactions of O2 molecules striking a carbon surface. MD-QCT technique uses quasi-classical methods to represent the …
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Physics-based molecular modeling of recombination reactions
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Beiträge zur Halogen- und Pseudohalogenchemie
… kJ mol–1, die zu einem Ladungstransfer von QCT = 0.385e (B3LYP/6-311+G(3df)) führt. Die Auswertung der IR- und Raman-Spektren ergab in Kombination mit den Ergebnissen von quantenmechanischen Rechnungen, dass die Cl-Atome sehr schwach an ein fast als SN+-Ion vorliegendes Kation gebunden sind. …
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Die therapeutischen Effekte von Estradiol, Dihydrotestosteron, Genistein und Equol auf den osteoporotischen Knochen der orchidektomierten männlichen Sprague-Dawley-Ratte
Die Wichtigkeit der Osteoporose beim Mann wurde lange Zeit unterschätzt und Studien zur männlichen Osteoporose wurden kaum durchgeführt. In der hier vorliegenden Studie wurden die therapeutischen Effekte von Estradiol, Dihydrotestosteron und den Isoflavonen Genistein und Equol auf den …