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匹配条件： “Hajar Moradmand” ，找到相关结果约253条。
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Comparing Methods for segmentation of Microcalcification Clusters in Digitized Mammograms
Hajar Moradmand,Saeed Setayeshi,Hossein Khazaei Targhi
International Journal of Computer Science Issues , 2011,
Abstract: The appearance of microcalcifications in mammograms is one of the early signs of breast cancer. So, early detection of microcalcification clusters (MCCs) in mammograms can be helpful for cancer diagnosis and better treatment of breast cancer. In this paper a computer system devised to support a radiologist in detection MCCs in digital mammography has been proposed. First, to facilitate and improve detection step, the mammogram images have been enhanced with wavelet transformation and morphology operation. Then for segmentation of suspicious MCCs, two methods have been investigated. The considered methods are: adaptive threshold and Watershed segmentation. The purpose of this paper is to find out which segmentation method is more appropriate for extracting suspicious areas that contain MCCs in mammograms. Finally the MCCs detection areas in different algorithms will be compared.
Comparing Methods for segmentation of Microcalcification Clusters in Digitized Mammograms
Hajar Moradmand,Saeed Setayeshi,Hossein Khazaei Targhi
Computer Science , 2012,
Abstract: The appearance of microcalcifications in mammograms is one of the early signs of breast cancer. So, early detection of microcalcification clusters (MCCs) in mammograms can be helpful for cancer diagnosis and better treatment of breast cancer. In this paper a computer method has been proposed to support radiologists in detection MCCs in digital mammography. First, in order to facilitate and improve the detection step, mammogram images have been enhanced with wavelet transformation and morphology operation. Then for segmentation of suspicious MCCs, two methods have been investigated. The considered methods are: adaptive threshold and watershed segmentation. Finally, the detected MCCs areas in different algorithms will be compared to find out which segmentation method is more appropriate for extracting MCCs in mammograms.
Comparing the Performance of Image Enhancement Methods to Detect Microcalcification Clusters in Digital Mammography
Hajar Moradmand,Saeed Setayeshi,Ali Reza Karimian,Mehri Sirous
Iranian Journal of Cancer Prevention , 2012,
Abstract: Background: Mammography is the primary imaging technique for detection and diagnosis of breast cancer; however, the contrast of a mammogram image is often poor, especially for dense and glandular tissues. In these cases the radiologist may miss some diagnostically important microcalcifications. In order to improve diagnosis of cancer correctly, image enhancement technology is often used to enhance the image and help radiologists.Methods: This paper presents a comparative study in digital mammography image enhancement based on four different algorithms: wavelet-based enhancement (Asymmetric Daubechies of order 8), Contrast-Limited Adaptive Histogram Equalization (CLAHE), morphological operators and unsharp masking. These algorithms have been tested on 114 clinical digital mammography images. The comparison for all the proposed image enhancement techniques was carried out to find out the best technique in enhancement of the mammogram images to detect microcalcifications.Results: For evaluation of performance of image enhancement algorithms, the Contrast Improvement Index (CII) and profile intensity surface area distribution curve quality assessment have been used after any enhancement. The results of this study have shown that the average of CII is about 2.61 for wavelet and for CLAHE, unsharp masking and morphology operation are about 2.047, 1.63 and 1.315 respectively. Conclusion: Experimental results strongly suggest that the wavelet transformation can be more effective and improve significantly overall detection of the Computer-Aided Diagnosis (CAD) system especially for dense breast. Compare to other studies, our method achieved a higher CII.
Experimental Results from Bore Phenomenon in Open Cylindrical Channel under Precession  [PDF]
Hajar Alshoufi
Open Journal of Fluid Dynamics (OJFD) , 2022, DOI: 10.4236/ojfd.2022.121004
Abstract: Experimental campaigns were carried out to extract results from the flow in an open cylindrical channel under precession. The bore or the hydraulic jump is the main concentration. The experimental results are varied; this includes velocity results and geometrical ones related to the depths, phases, and lengths. For the geometrical ones a Coupled-Charged Device Camera (CCD) is used to extract pictures, those enable us to get quantitative and qualitative results. For the velocity results, Acoustic Doppler Velocimeter (ADV) is used to extract the velocity signals under the bore surface, after analyzing them it turned out that they have Cnoidal form, thus a new BBM model is derived, which is exactly as the one derived by Peregrine (1966), the only difference is the forcing gravity term, this model is solved analytically after omitting this gravity term as it is considered small, and the solution is compared with the real signals with good match. Finally, a new relationship that connects between the conjugate depths after and before the bore is derived which has time-space dependency due to the Centrifugal effect, it was also used and compared with some experimental results.
A survey of myocardial infarction in diabetic patients
Moradmand S
Tehran University Medical Journal , 1997,
Abstract: This is a retrospective study on the records of patients with infarction admitted to C.C.U wards of Imam Khomeini hospital, Amir-alam hospital & Shariati hospital, during 7 months (1995-94). In total patients of 209 with average age of 59.5 years, there were 133 men with average age of 57.1 and 76 women with average age of 63.7 years. In this study, women with MI are older than men. From 209 patients with infarction, 51 patients had diabetes, that show diabetes prevalence of 24.4%. On the other side, there were 28 men & 23 women with diabetes, which indicates a prevalence of 21.8% among men and 30.2% among women. Thus diabetic women experience infarction more than diabetic men. This result is compatible with classic reports. The average age of diabetic patients is lower than non diabetics. This difference is between diabetic and non diabetic women (58.4 vs 66.1), but there's no difference between diabetic and non diabetic men (58.7 vs 57.7). Prevalence of diabetes in sixth & seventh decades has a peak among patients with infarction, and this is compatible with international reports that indicate CAD as prominent disease of diabetic patients in sixth and seventh decades. In our study hypertension and hyperlipidemia are the most frequent risk factors together with diabetes in infarction. The duration of disease before infarction was from 5 to 15 years. Concerning treatment of diabetic patients we showed that, as most patients in these ages are non insulin-dependant, they had taken oral antidiabetic drugs for long time or without treatment, and fewest were on insulin. Chief complaints of our patients were chest pain, epigastric pain, nausea and vomiting, weakness and dyspnea and faint. Fourteen percent of men and 30% of women had no chest pain on admission indicating to be careful about other symptoms of old diabetic patients with coronary artery disease.
The Incidence of Rheumatic and Congenital Heart Disease in School Children of Bardsir, Kerman
S Moradmand
Iranian Journal of Pediatrics , 1995,
Abstract:
A With-In Host Dengue Infection Model with Immune Response and Beddington-DeAngelis Incidence Rate  [PDF]
Hajar Ansari, Mahmoud Hesaaraki
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.32028
Abstract: A model of viral infection of monocytes population by dengue virus is formulated in a system of four ordinary differenttial equations. The model takes into account the immune response and the incidence rate of susceptible and free virus particle as Beddington-DeAngelis functional response. By constructing a block, the global stability of the unin-fected steady state is investigated. This steady state always exists. If this is the only steady state, then it is globally asymptotically stable. If any infected steady state exists, then uninfected steady state is unstable and one of the infected steady states is locally asymptotically stable. These different cases depend on the values of the basic reproduction ratio and the other parameters.
Proposal for an Implementation Methodology of Key Risk Indicators System: Case of Investment Management Process in Moroccan Asset Management Company  [PDF]
Hajar Mouatassim, Abdelmajid Ibenrissoul
Journal of Financial Risk Management (JFRM) , 2015, DOI: 10.4236/jfrm.2015.43015
Abstract: Operational risk is a prominent preoccupation of all managers these days. Indeed, the development of collective awareness has led executives to implement a wide variety of solutions in order to keep this risk and its consequences under control. In this context, we propose a practical implementation methodology of key risk indicators system with the aim to identify operational risks and above all to propose preventive and corrective measures capable of monitoring and managing operational risks. The proposed system will be adjusted to Investment Management process in a Moroccan Asset Management Company.
The Blue Girl
Hajar Ahmed Hajar Albinali
Global Cardiology Science & Practice , 2012, DOI: 10.5339/gcsp.2012.3
Abstract:
Majnoon Lila
Hajar Ahmed Hajar Albinali
Global Cardiology Science & Practice , 2012, DOI: 10.5339/gcsp.2012.16
Abstract: The love story of Majnoon Lila is well known across all levels of society in the Arab world. The story is famous in Arabic literature as well as in Arab folk stories. In this paper, the poems of Quasis are analyzed and a diagnosis of organic heart failure is made from his complaints.
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