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Two aspects of a widely used 1D model of blood flow in a single blood vessel are studied by symmetry analysis, where the variables in the model are the blood pressure and the cross-section area of the blood vessel. As one main result, all…

流体动力学 · 物理学 2023-06-12 Stephen C. Anco , Almudena P. Marquez , Tamara M. Garrido , Maria L. Gandarias

We are interested in simulating blood flow in arteries with a one dimensional model. Thanks to recent developments in the analysis of hyperbolic system of conservation laws (in the Saint-Venant/ shallow water equations context) we will…

数值分析 · 数学 2013-04-24 Olivier Delestre , Pierre-Yves Lagrée

Systematic in vivo validations of computational models of the aortic valve remain scarce, despite successful validation against in vitro data. Utilizing a combination of computed tomography and 4D flow magnetic resonance imaging data, we…

This study creates a physiologically realistic virtual patient database (VPD), representing the human arterial system, for the primary purpose of studying the affects of arterial disease on haemodynamics. A low dimensional representation of…

医学物理 · 物理学 2021-08-05 Gareth Jones , Jim Parr , Perumal Nithiarasu , Sanjay Pant

Objective: Blood transfusions, crucial in managing anemia and coagulopathy in ICU settings, require accurate prediction for effective resource allocation and patient risk assessment. However, existing clinical decision support systems have…

This study proposes an automatic technique for liver segmentation in computed tomography (CT) images. Localization of the liver volume is based on the correlation with an optimized set of liver templates developed by the authors that allows…

图像与视频处理 · 电气工程与系统科学 2020-01-01 N. S. Kulberg , A. B. Elizarov , V. P. Novik , V. A. Gombolevsky , A. P. Gonchar , A. L. Alliua , V. Yu. Bosin , A. V. Vladzymyrsky , S. P. Morozov

Stroke poses a significant global health threat, with millions affected annually, leading to substantial morbidity and mortality. Current stroke risk assessment for the general population relies on markers such as demographics, blood tests,…

图像与视频处理 · 电气工程与系统科学 2024-07-24 Yu Xi Huang , Simon Mahler , Aidin Abedi , Julian Michael Tyszka , Yu Tung Lo , Patrick D. Lyden , Jonathan Russin , Charles Liu , Changhuei Yang

We present a non-invasive, label-free method of imaging blood cells flowing through human capillaries in vivo using oblique back-illumination capillaroscopy (OBC). Green light illumination allows simultaneous phase and absorption contrast,…

生物物理 · 物理学 2020-01-20 Gregory N. McKay , Nela Mohan , Nicholas J. Durr

Flux of rigid or soft particles (such as drops, vesicles, red blood cells, etc.) in a channel is a complex function of particle concentration, which depends on the details of induced dissipation and suspension structure due to hydrodynamic…

We propose a fully-automated method for accurate and robust detection and segmentation of potentially cancerous lesions found in the liver and in lymph nodes. The process is performed in three steps, including organ detection, lesion…

计算机视觉与模式识别 · 计算机科学 2017-03-21 Assaf Hoogi , John W. Lambert , Yefeng Zheng , Dorin Comaniciu , Daniel L. Rubin

Billions of vascular access procedures are performed annually worldwide, serving as a crucial first step in various clinical diagnostic and therapeutic procedures. For pediatric or elderly individuals, whose vessels are small in size…

机器人学 · 计算机科学 2025-04-09 Shuaiqi Jing , Tianliang Yao , Ke Zhang , Di Wu , Qiulin Wang , Zixi Chen , Ke Chen , Peng Qi

The emergence of computational fluid dynamics (CFD) enabled the simulation of intricate transport processes, including flow in physiological structures, such as blood vessels. While these so-called hemodynamic simulations offer…

Applications of ultrasound images have expanded from fetal imaging to abdominal and cardiac diagnosis. Liver-being the largest gland in the body and responsible for metabolic activities requires to be to be diagnosed and therefore subject…

图像与视频处理 · 电气工程与系统科学 2020-01-27 Md Abdul Mutalab Shaykat , Yashna Islam , Mohammad Ishtiaque Hossain

Computer modeling can provide quantitative insight into cardiac fluid dynamics phenomena that are not evident from standard imaging tools. We propose a new approach to modeling left ventricle fluid dynamics based on an image-driven…

Cerebral aneurysms are pathological dilations of intracranial arteries that can rupture with devastating consequences, including subarachnoid hemorrhage, stroke, and death. Accumulating evidence indicates that local hemodynamic forces play…

其他定量生物学 · 定量生物学 2025-05-22 Reza Bozorgpour , Pilwan Kim

Cerebrovascular diseases such as brain aneurysms are a primary cause of adult disability. The flow dynamics in brain arteries, both during periods of rest and increased activity, are known to be a major factor in the risk of aneurysm…

This study investigates the hemodynamic behavior of blood flow in the aortic arch across anemic, diabetic, and healthy conditions using computational fluid dynamics (CFD) simulations with a non-Newtonian Carreau viscosity model. Velocity…

流体动力学 · 物理学 2025-06-23 Farzana Akter Tina , Hashnayne Ahmed , Hena Rani Biswas

Atherosclerosis is a state wherein plaque (fat, cholesterol, and different substances) develops inside the veins that in the end prompts carotid artery stenosis which is a phase of narrowing in the huge courses situated on either side of…

医学物理 · 物理学 2021-08-03 Nihal Ahmed , Ashfaq Ahmed , Sakan Binte Imran

Cardiovascular diseases, specifically cerebral aneurysms, represent a major cause of morbidity and mortality, having a significant impact on the cost and overall status of health care. In the present work, we employ a haemorheological blood…

流体动力学 · 物理学 2023-10-23 Kamyar Behrouzi , Zahra Khodabakhshi Fard , Azadeh Jafari , Robert G. Owens

To understand Working of Human Brain measurements related to the brain function are required. These measurements should be possibly non-invasive. Brain should be disturbed as less as possible during the measurement. Integration of various…

新兴技术 · 计算机科学 2015-06-16 Revati Shriram , M. Sundhararajan , Nivedita Daimiwal
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