Sharif Digital Repository

Design of linear anti-scatter grid geometry with optimum performance for screen-film and digital mammography systems

Author

Khodajou Chokami, H.

Publisher

Institute of Physics Publishing,

Pub. Year

2015

Subjects

Mammography. / Monte Carlo. / Simulation. / Geometry. / Intelligent systems. / 3D Monte Carlo simulation. / Anti-scatter grids. / Contrast improvements. / Digital mammography system. / Improvement factors. / International standards. / Screen-film mammographies. / Image processing. / Image quality. / Procedures. / Radiation scattering. / Signal noise ratio. / Breast Neoplasms. / Computer Systems. / Female. / Humans. / Image Processing, Computer-Assisted. / Monte Carlo Method. / Phantoms, Imaging. / Scattering, Radiation. / Signal-To-Noise Ratio.

A hybrid deep model for automatic arrhythmia classification based on LSTM recurrent networks

Author

Bitarafan, A.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2020

Subjects

Convolutional neural network. / Dilated convolution. / ECG signal. / LSTM. / Recurrent neural network. / Convolution. / Convolutional neural networks. / Deep learning. / Diseases. / Electrocardiography. / Signal detection. / Arrhythmia classification. / Arrhythmia detection. / Convolutional networks. / MIT-BIH database. / Overall accuracies. / R-peak detection. / Recurrent networks. / Ventricular tachyarrhythmias. / Long short-term memory.

MCNP-FBSM: Development of MCNP/MCNPX Source Model for Simulation of Multi-Slice Fan-Beam X-Ray CT Scanners

Author

Khodajou Chokami, H.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2019

Subjects

Computed Tomography imaging. / Image reconstruction. / MCNP-FBSM. / Modeling. / Monte Carlo simulations. / Diagnosis. / Image enhancement. / Intelligent systems. / Models. / Monte Carlo methods. / Scanning. / Diagnostic imaging. / Future innovations. / Geometrical designs. / Image reconstruction algorithm. / Perennial problems. / Research and development. / System configurations. / Computerized tomography.

Designing an improved model of the adult female ICRP reference phantom dedicated to mammography procedure

Author

Ebrahimi-Khankook, A.

Pub. Year

2024

Subjects

Monte Carlo simulation. / Organ doses. / Adult. / Female. / Humans. / Monte Carlo Method. / Phantoms, Imaging. / Radiation Dosage. / Radiation Protection. / Radiometry. / Intelligent systems. / Mammography. / Monte Carlo methods. / Adult females. / Breast abnormalities. / Imaging method. / Low energy photons. / Monte Carlo's simulation. / Organ dose. / Patient positioning. / Phantom head. / Realistic phantom. / Human. / Imaging phantom. / Radiation dose. / Phantoms.

PARS-NET: A novel deep learning framework using parallel residual conventional neural networks for sparse-view CT reconstruction

Author

Khodajou Chokami, H.

Publisher

IOP Publishing Ltd,

Pub. Year

2022

Subjects

Parallel neural networks. / Residual neural networks. / Sparse-view CT reconstruction. / Data acquisition. / Image reconstruction. / Large dataset. / Computed tomography images. / Deep learning. / Euclidean metrics. / Log-Euclidean. / Log-euclidean metric. / Neural-networks. / Residual neural network. / Sparse-view computed tomography reconstruction. / Tomography reconstruction. / Computerized tomography.

A deep learning method for high-quality ultra-fast CT image reconstruction from sparsely sampled projections

Author

Khodajou Chokami, H.

Publisher

Elsevier B.V,

Pub. Year

2022

Subjects

Computed tomography. / Few-view CT. / Image reconstruction. / Data acquisition. / Textures. / Convolution neural network. / CT Image. / Deep learning. / High quality. / Images reconstruction. / Learning methods. / Performance. / Receptive fields. / Ultra-fast. / Computerized tomography.

A novel method for measuring the MTF of CT scanners: A phantom study

Author

Khodajou Chokami, H.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2019

Subjects

Computed Tomography. / Electron density. / Modulation transfer function. / Noise. / Wavelet transform. / Carrier concentration. / Electron density measurement. / Electrons. / Modulation. / Optical transfer function. / Phantoms. / Quality assurance. / Scanning. / Wavelet decomposition. / Wavelet transforms. / Accurate estimation. / Computed tomography scanners. / Crucial parameters. / Edge spread function. / Image noise level. / Phantom studies. / Signal decomposition. / Computerized tomography.

QCT: A measuring tool dedicated to the estimation of image parameters for quality assurance/quality control programs of ct scanners

Author

Khodajou Chokami, H.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2020

Subjects

Computed Tomography. / CT number. / Limiting spatial resolution. / Modulation transfer function. / Noise power spectrum. / Computerized tomography. / Diagnosis. / Display devices. / Medical imaging. / Monitoring. / Phantoms. / Program diagnostics. / Quality assurance. / Scanning. / User interfaces. / Accreditation programs. / American college of radiologies. / Computational phantom. / Contrast to noise ratio. / Experimental assessment. / Line spread functions. / User friendly interface. / Quality control.

Mamsim: A computational software platform for measuring and optimizing imaging and dosimetry parameters in screen-film and digital mammography systems

Author

Khodajou Chokami, H.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2020

Subjects

Dosimetry. / Mammography imaging. / MamSim. / Monte-Carlo method. / Optimization. / Geometry. / Graphical user interfaces. / Medical imaging. / Simulation platform. / X ray detectors. / X ray tubes. / Anti-scatter grids. / Computational software. / Desired image qualities. / Digital mammography system. / Geometrical designs. / Glandular tissue. / Scattered radiations. / Image quality.

Personalized computational human phantoms via a hybrid model-based deep learning method

Author

Khodajou Chokami, H.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2020

Subjects

Computational human phantoms. / Follow-up CT imaging. / Lattice method. / Monte-carlo method. / Semantic segmentation. / Voxel merging algorithm. / Computerized tomography. / Convolutional neural networks. / Digital storage. / Image enhancement. / Image segmentation. / Learning systems. / Magnetic resonance imaging. / Medical applications. / Medical imaging. / Phantoms. / Simulators. / X rays. / Automated segmentation. / Automatic Generation. / Design and optimization. / Future innovations. / Geometrical designs. / Image reconstruction algorithm. / Protocol evaluation. / Radiological imaging. / Deep learning.

Monte carlo modeling of magnification mode for quantitative assessment of image quality in mammography systems

Author

Safarzadeh Amiri, A.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2019

Subjects

Contrast. / Magnification. / MCNPX code. / Monte-Carlo method. / Phase space file. / Codes (symbols) / Computer software. / Image enhancement. / Light scattering. / Mammography. / Medical imaging. / Monte Carlo methods. / Neutron detectors. / Phase space methods. / Photons. / Quality control. / Mammographic image quality. / Monte carlo n particles. / Phase-space files. / Quantitative assessments. / Scatter-to-primary ratio. / Image quality.

Nonlinear interstory drift contours for idealized forward directivity pulses using "modified fish-bone" models

Author

Khalo, A. R.

Publisher

Multi-Science Publishing Co. Ltd,

Pub. Year

2015

Subjects

Forward directivity pulses. / Modified fish-bone model. / Nonlinear interstory drift. / Simplified MDOF model. / Bone. / Concrete beams and girders. / Tall buildings. / Contour. / Fish bones. / Forward directivity. / Interstory drifts. / Moment frames. / Near-fault earthquake. / Fish.

Analysis of singularities of a 3DOF parallel manipulator based on a novel geometrical method

Author

Pendar, H.

Pub. Year

2006

Subjects

Constrained plain method (CPM) / Constraint plane (CP) / Infinite constraint plane (ICP) / Parallel manipulator. / Computational geometry. / Constraint theory. / Matrix algebra. / Parallel processing systems. / Theorem proving. / Manipulators.

Melting enthalpy and entropy of freestanding metallic nanoparticles based on cohesive energy and average coordination number

Author

Omid, H.

Pub. Year

2011

Subjects

Adjustable parameters. / Analytical model. / Average coordination number. / Body-centered cubic. / Body-centered-tetragonal (bct) structure. / Cohesive energies. / Melting enthalpy. / Metallic nanoparticles. / Physical constants. / Variable coordination. / Crystal structure. / Entropy. / Mathematical models. / Molecular dynamics. / Nanoparticles. / Melting.

On the temperature and residual stress field during grinding

Author

H-Gangaraj, S. M.

Pub. Year

2010

Subjects

Grinding. / Residual stress. / Temperature field. / Dimensional accuracy. / Finite Element. / Grinding parameters. / Heat coefficients. / Mechanical damages. / Parametric study. / Residual stress fields. / Surface finishes. / Surface residual stress. / Tensile residual stress. / Thermo-mechanical. / Work pieces. / Workpiece velocity. / Finite element method. / Grinding (comminution) / Grinding (machining) / Heat convection. / Manufacture. / Stress concentration. / Residual stresses.

A new lattic LP-based post filter for adaptive noise cancellers in mobile and vehicular applications

Author

Khorram, S.

Pub. Year

2008

Subjects

Adaptive lattice filter. / Adaptive noise cancellation (ANC) / Adaptive noise cancellations. / Adaptive noise canceller. / Background noise reduction. / Diffuse noise. / Diffuse noise field. / Lattice filter. / Linear prediction. / Noise fields. / Noise reduction. / Noise reductions. / Postfilter. / Processing delay. / Quality measures. / Single channels. / Speech enhancement system. / Vehicular applications. / Vehicular environments. / Acoustic noise measurement. / Automobile parts and equipment. / Communication systems. / Microphones. / Signal processing. / Speech enhancement. / Spurious signal noise. / Speech communication.

Advancing Compressive Strength Prediction in Self-Compacting Concrete via Soft Computing: A Robust Modeling Approach

Author

Ghorbani, A.

Pub. Year

2024

Subjects

Artificial neural network. / Compressive strength prediction. / Robust approach. / Self-compacting concrete. / Sensitivity analysis.

Cost estimation models for seismic retrofit of masonry school buildings

Author

Mirzaei, J.

Pub. Year

2024

Subjects

Cost estimation. / Lasso regression. / Project management. / Regression. / Ridge regression. / Seismic retrofit.