نتایج جستجو برای: blood vessel

تعداد نتایج: 721176  

Journal: :Japanese Journal of Thrombosis and Hemostasis 1991

Journal: :international clinical neurosciences journal 0
keyvan hajirayat department of biomedical engineering, north tehran branch, islamic azad university, tehran, iran seifollah gholampour deptartment of bimedical engineering, north tehran branch, islamic azad university, tehran, iran amir saeed seddighi functional neurosurgery research centre of shohada tajrish hospital, shahid beheshti university of medical sciences, tehran, iran nasser fatouraee biological fluid mechanics research laboratory, biomechanics department, biomedical engineering faculty, amirkabir university of technology, tehran

background: aneurysm is a blood-filled bulge in the wall of vessels that occurred in abdominal aortic and cerebral vessels. the dilation of artery leads to aneurysm. methods: three dimensional modelling was utilized for a patient with cerebral aneurysm and a normal subject, and additional fluid-structural interaction simulation was performed. we consider pulsatile blood velocity as inlet, and b...

In this paper, a new unsupervised algorithm for automatic retinal blood vessel extraction is presented. A pre-processing step is introduced to eliminating optic disk and back ground noise. Blood vessel highlighting is prepared by a new method inspired by simple cells in human visual system. An adaptive threshold is introduced as an activation function of simple cells. Post-processing step is us...

2015
A. S. Jadhav Pushpa B. Patil

Retina images are obtained from the fundus camera and graded by skilled professionals. However there is considerable shortage of expert observers has encouraged computer assisted monitoring. Evaluation of blood vessels network plays an important task in a variety of medical diagnosis. Manifestations of numerous vascular disorders, such as diabetic retinopathy, depend on detection of the blood v...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان 1387

چکیده ندارد.

Journal: :The International journal of developmental biology 2011
Jeannine Missbach-Guentner Julia Hunia Frauke Alves

Significant advances have been made in understanding the role of tumor angiogenesis and its influence on tumor progression in cancer. Based on this knowledge, a series of inhibitors of angiogenesis have been developed and evaluated in preclinical and clinical trials. Since detailed information of tumor progression in response to therapy is important to assess the efficacy of anti-tumor treatmen...

ژورنال: Hormozgan Medical Journal 2013
Farshidfar, GhR. , Kamaran, M. , Keshavarz, M. , Soltani, N. ,

Introduction: Magnesium is the second intracellular and fourth common action in the body. Magnesium deficit has been described in patients with type I diabetes. Hypomagnesemia can also be the cause for some clinical diseases such as diabetes. Some researches showed that plasma magnesium level decreases after diabetes induction. Some research believed that magnesium deficiency is a risk factor f...

A. R. Mehdizadeh A. Zare E. Goshtasbi Rad H. Emdad M. B. Sharifkazemi Z. Mortazavinia,

Background: The interaction between the blood and the vessel wall is of great clinical interest in studying cardiovascular diseases, the major causes of death in developed countries.Objective: To understand the effects of incorporating fluid-structure interaction into the simulation of blood flow through an anatomically realistic model of abdominal aorta and renal arteries reconstructed from CT...

2005
Charles B. Higgins

Blood flow phenomena occurring when flow is within the magnetic resonance (MR) imaging plane were analyzed. In this situation, the signal intensity of vascular lumina is predominantly determined by spin-phase change phenomena, and section transition effects of moving spins can be neglected. In this paper, we develop the concepts of in-plane flow, with emphasis on the notion that the spatial var...

M Ramachandra S B Mehta Y Kiran Kumar,

Background and Objective: Cerebral Arteriovenous Malformation (CAVM) hemodynamic is disease condition, results changes in the flow and pressure level in cerebral blood vessels. Measuring flow and pressure without catheter intervention along the vessel is big challenge due to vessel bifurcations/complex bifurcations in Arteriovenous Malformation patients. The vessel geometry in CAVM patients are...

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