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Papers by Narjes Benameur

Research paper thumbnail of Mitral Valve Leaflets segmentation approaches based upon Frangi filter and ISODATA clustering

Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2021

Research paper thumbnail of Quantitative analysis of myocardial motion in cardiac magnetic resonance imaging using covariance function

2017 International Conference on Engineering & MIS (ICEMIS), 2017

The extraction of additional quantitative features are needed in cardiac magnetic resonance (CMR)... more The extraction of additional quantitative features are needed in cardiac magnetic resonance (CMR) exam to characterize the regional wall motion abnormalities related to several cardiac pathologies. The aim of this study is to present a method for myocardial wall motion analysis based on the covariance function. We tested the proposed method on cine MRI images related to 26 subjects (12 with myocardial infarction, 5 with myocarditis, 5 healthy subjects and 4 with dilated cardiomyopathy (CMD)) with age ranging from 19 to 80. The outcomes of this study show that the proposed image based on the covariance image is able to represent a tool to identify the location, the transmurality of wall motion abnormalities related to different cardiac pathologies. Therefore, this technique is likely to provide additional information to CMR clinical practice.

Research paper thumbnail of Regional Assessment of Ventricular Hypokinesia by Magnetic Resonance Imaging (MRI)

Research paper thumbnail of Fully‐automatic identification of gynaecological abnormality using a new adaptive frequency filter and histogram of oriented gradients ( HOG )

Research paper thumbnail of Parametric Methods for the Regional Assessment of Cardiac Wall Motion Abnormalities: Comparison Study

Computers, Materials & Continua

Research paper thumbnail of SARS-CoV-2 diagnosis using medical imaging techniques and artificial intelligence: A review

Research paper thumbnail of Left ventricular MRI wall motion assessment by monogenic signal amplitude image computation

Magnetic Resonance Imaging

Research paper thumbnail of The Role of Phase Image in the Detection of Myocardial Dyskinesia by Magnetic Resonance Imaging (MRI)

Current Medical Imaging Formerly Current Medical Imaging Reviews

Background: The assessment of cardiac wall motion abnormalities plays an important role in the ev... more Background: The assessment of cardiac wall motion abnormalities plays an important role in the evaluation of many cardiovascular diseases and the prediction of functional recovery. Most of the methods dedicated to identifying the location of wall motion abnormalities have been restricted to study hypokinesia while an accurate way to assess dyskinesia is still needed in Cardiac Magnetic Resonance Imaging (CMRI). Objective: The aim of this study is to propose a phase image based on the analytic signal able to assess the extent of the myocardial dyskinetic segments in Cardiac Magnetic Resonance Imaging (CMRI). Materials: 22 subjects were retrospectively enrolled in this study (age 46 ± 11): 15 presenting an aneurysm and 7 control subjects with normal wall motion. For each patient, three standard views (short axis view, 2 chamber and 4 chamber views) were acquired using 3 Tesla Siemens Avanto MRI scanner and a segmented True FISP sequence. All the cine MRI images were analyzed by two ex...

Research paper thumbnail of Partial Congenital Absence of The Pericardium: A Case Report

Brazilian Journal of Cardiovascular Surgery

The complete or the partial absence of pericardium is a rare congenital malformation for which th... more The complete or the partial absence of pericardium is a rare congenital malformation for which the patients are commonly asymptomatic and the diagnosis is incidental. The absence of the left side of the pericardium is the most common anomaly that is reported in the literature while the complete absence of pericardium or the absence of the right side of the pericardium are uncommon and their criteria are still unrecognized given their rare occurrence in clinical practice. This paper aims to report a case of 19-year-old male with the congenital partial absence of both sides of the pericardium and to highlight the symptoms and the different cardiac imaging modalities used to confirm the diagnosis of this defect.

Research paper thumbnail of Comparison Between 3D Echocardiography and Cardiac Magnetic Resonance Imaging (CMRI) in the Measurement of Left Ventricular Volumes and Ejection Fraction

Current Medical Imaging Formerly Current Medical Imaging Reviews

Background: Echocardiography and Cardiac Magnetic Resonance Imaging (CMRI) are two noninvasive te... more Background: Echocardiography and Cardiac Magnetic Resonance Imaging (CMRI) are two noninvasive techniques for the evaluation of cardiac function for patients with coronary artery diseases. Although echocardiography is the commonly used technique in clinical practice for the assessment of cardiac function, the measurement of LV volumes and left ventricular ejection fraction (LVEF) by the use of this technique is still influenced by several factors inherent to the protocol acquisition, which may affect the accuracy of echocardiography in the measurement of global LV parameters. Objective: The aim of this study is to compare the end systolic volume (ESV), the end diastolic volume (EDV), and the LVEF values obtained with three dimensional echocardiography (3D echo) with those obtained by CMRI (3 Tesla) in order to estimate the accuracy of 3D echo in the assessment of cardiac function. Methods: 20 subjects, (9 controls, 6 with myocardial infarction, and 5 with myocarditis) with age varyi...

Research paper thumbnail of The Assessment of left ventricular Function in MRI using the detection of myocardial borders and optical flow approaches: A Review

International Journal of Cardiovascular Practice

The evaluation of left ventricular wall motion in Magnetic Resonance Imaging (MRI) clinical pract... more The evaluation of left ventricular wall motion in Magnetic Resonance Imaging (MRI) clinical practice is based on a visual assessment of cine-MRI sequences. In fact, clinical interpreters (radiologists) proceed with a global visual evaluation of multiple cine-MRI sequences acquired in the three standard views. In addition, some functional parameters are quantified following a manual or a semi-automatic contouring of the myocardial borders. Although these parameters give information about the functional state of the left ventricle, they are not able to provide the location and the extent of wall motion abnormalities, which are associated with many cardiovascular diseases. In the past years, several approaches were developed to overcome the limitations of the classical evaluation techniques of left ventricular function. The aim of this article is to present an overview of the different methods and to summarize the relevant techniques based on myocardial contour detection and optical flow for regional assessment of left ventricular abnormalities.

Research paper thumbnail of Lack of AI-based method for pneumocystis pneumonia classification in radiological diagnosis of SARS-CoV-2

Research paper thumbnail of Mitral Valve Leaflets segmentation approaches based upon Frangi filter and ISODATA clustering

Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2021

Research paper thumbnail of Quantitative analysis of myocardial motion in cardiac magnetic resonance imaging using covariance function

2017 International Conference on Engineering & MIS (ICEMIS), 2017

The extraction of additional quantitative features are needed in cardiac magnetic resonance (CMR)... more The extraction of additional quantitative features are needed in cardiac magnetic resonance (CMR) exam to characterize the regional wall motion abnormalities related to several cardiac pathologies. The aim of this study is to present a method for myocardial wall motion analysis based on the covariance function. We tested the proposed method on cine MRI images related to 26 subjects (12 with myocardial infarction, 5 with myocarditis, 5 healthy subjects and 4 with dilated cardiomyopathy (CMD)) with age ranging from 19 to 80. The outcomes of this study show that the proposed image based on the covariance image is able to represent a tool to identify the location, the transmurality of wall motion abnormalities related to different cardiac pathologies. Therefore, this technique is likely to provide additional information to CMR clinical practice.

Research paper thumbnail of Regional Assessment of Ventricular Hypokinesia by Magnetic Resonance Imaging (MRI)

Research paper thumbnail of Fully‐automatic identification of gynaecological abnormality using a new adaptive frequency filter and histogram of oriented gradients ( HOG )

Research paper thumbnail of Parametric Methods for the Regional Assessment of Cardiac Wall Motion Abnormalities: Comparison Study

Computers, Materials & Continua

Research paper thumbnail of SARS-CoV-2 diagnosis using medical imaging techniques and artificial intelligence: A review

Research paper thumbnail of Left ventricular MRI wall motion assessment by monogenic signal amplitude image computation

Magnetic Resonance Imaging

Research paper thumbnail of The Role of Phase Image in the Detection of Myocardial Dyskinesia by Magnetic Resonance Imaging (MRI)

Current Medical Imaging Formerly Current Medical Imaging Reviews

Background: The assessment of cardiac wall motion abnormalities plays an important role in the ev... more Background: The assessment of cardiac wall motion abnormalities plays an important role in the evaluation of many cardiovascular diseases and the prediction of functional recovery. Most of the methods dedicated to identifying the location of wall motion abnormalities have been restricted to study hypokinesia while an accurate way to assess dyskinesia is still needed in Cardiac Magnetic Resonance Imaging (CMRI). Objective: The aim of this study is to propose a phase image based on the analytic signal able to assess the extent of the myocardial dyskinetic segments in Cardiac Magnetic Resonance Imaging (CMRI). Materials: 22 subjects were retrospectively enrolled in this study (age 46 ± 11): 15 presenting an aneurysm and 7 control subjects with normal wall motion. For each patient, three standard views (short axis view, 2 chamber and 4 chamber views) were acquired using 3 Tesla Siemens Avanto MRI scanner and a segmented True FISP sequence. All the cine MRI images were analyzed by two ex...

Research paper thumbnail of Partial Congenital Absence of The Pericardium: A Case Report

Brazilian Journal of Cardiovascular Surgery

The complete or the partial absence of pericardium is a rare congenital malformation for which th... more The complete or the partial absence of pericardium is a rare congenital malformation for which the patients are commonly asymptomatic and the diagnosis is incidental. The absence of the left side of the pericardium is the most common anomaly that is reported in the literature while the complete absence of pericardium or the absence of the right side of the pericardium are uncommon and their criteria are still unrecognized given their rare occurrence in clinical practice. This paper aims to report a case of 19-year-old male with the congenital partial absence of both sides of the pericardium and to highlight the symptoms and the different cardiac imaging modalities used to confirm the diagnosis of this defect.

Research paper thumbnail of Comparison Between 3D Echocardiography and Cardiac Magnetic Resonance Imaging (CMRI) in the Measurement of Left Ventricular Volumes and Ejection Fraction

Current Medical Imaging Formerly Current Medical Imaging Reviews

Background: Echocardiography and Cardiac Magnetic Resonance Imaging (CMRI) are two noninvasive te... more Background: Echocardiography and Cardiac Magnetic Resonance Imaging (CMRI) are two noninvasive techniques for the evaluation of cardiac function for patients with coronary artery diseases. Although echocardiography is the commonly used technique in clinical practice for the assessment of cardiac function, the measurement of LV volumes and left ventricular ejection fraction (LVEF) by the use of this technique is still influenced by several factors inherent to the protocol acquisition, which may affect the accuracy of echocardiography in the measurement of global LV parameters. Objective: The aim of this study is to compare the end systolic volume (ESV), the end diastolic volume (EDV), and the LVEF values obtained with three dimensional echocardiography (3D echo) with those obtained by CMRI (3 Tesla) in order to estimate the accuracy of 3D echo in the assessment of cardiac function. Methods: 20 subjects, (9 controls, 6 with myocardial infarction, and 5 with myocarditis) with age varyi...

Research paper thumbnail of The Assessment of left ventricular Function in MRI using the detection of myocardial borders and optical flow approaches: A Review

International Journal of Cardiovascular Practice

The evaluation of left ventricular wall motion in Magnetic Resonance Imaging (MRI) clinical pract... more The evaluation of left ventricular wall motion in Magnetic Resonance Imaging (MRI) clinical practice is based on a visual assessment of cine-MRI sequences. In fact, clinical interpreters (radiologists) proceed with a global visual evaluation of multiple cine-MRI sequences acquired in the three standard views. In addition, some functional parameters are quantified following a manual or a semi-automatic contouring of the myocardial borders. Although these parameters give information about the functional state of the left ventricle, they are not able to provide the location and the extent of wall motion abnormalities, which are associated with many cardiovascular diseases. In the past years, several approaches were developed to overcome the limitations of the classical evaluation techniques of left ventricular function. The aim of this article is to present an overview of the different methods and to summarize the relevant techniques based on myocardial contour detection and optical flow for regional assessment of left ventricular abnormalities.

Research paper thumbnail of Lack of AI-based method for pneumocystis pneumonia classification in radiological diagnosis of SARS-CoV-2