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Dissertations / Theses on the topic 'Hemodynamické parametry'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Hemzalová, Zuzana. "Evoluční algoritmy pro ultrazvukovou perfúzní analýzu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442504.

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This thesis deals with the principles of ultrasonic perfusion analysis and methods for determining perfusion parameters. It examines Evolutionary algorithms and their ability to optimize the approximation of dilution curves from ultrasond tissue scannig. It compares the optimization performance of three evolutionary algorithms. Continuous genetic algorithm GA, algorithm SOMA and PSO. Methods are evaluated on simulated and clinical data.

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2

Urquhart, Gayle. "Timing of hemodynamic pressure measurements and thermodilutional cardiac outputs on derived hemodynamic parameters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40155.pdf.

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3

Downing, Joey Micah. "Flow through a compliant stenotic artery : a parametric evaluation." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17865.

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4

Havlíček, Martin. "Zkoumání konektivity mozkových sítí pomocí hemodynamického modelování." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-233576.

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Zobrazení funkční magnetickou rezonancí (fMRI) využívající "blood-oxygen-level-dependent" efekt jako indikátor lokální aktivity je velmi užitečnou technikou k identifikaci oblastí mozku, které jsou aktivní během percepce, kognice, akce, ale také během klidového stavu. V poslední době také roste zájem o studium konektivity mezi těmito oblastmi, zejména v klidovém stavu. Tato práce předkládá nový a originální přístup k problému nepřímého vztahu mezi měřenou hemodynamickou odezvou a její příčinou, tj. neuronálním signálem. Zmíněný nepřímý vztah komplikuje odhad efektivní konektivity (kauzálního o

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5

Shi, Jun. "Constructing FHNNs to detect CVDs through hemodynamic parameters derived from sphygmogram." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493321.

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6

Faik, Isam. "3D characterization of the hemodynamic parameters in a stented coronary artery." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82485.

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Stenting is becoming the major interventional cardiology procedure worldwide. However restenosis remains a major limitation to the effectiveness of stents. Alterations to the local hemodynamics in the stented segment of the artery is a potential factor in the development of in-stent restenosis. The characterization of wall shear stress and of blood flow patterns in a stented artery is therefore necessary for a good understanding of the phenomenon. We have used a time-dependent 3D numerical model of a stented coronary artery to study the characteristics of the blood flow and the shear st

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7

Rajabi, Jaghargh Ehsan. "Effects of hemodynamic stresses on the remodeling parameters in arteriovenous fistula." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1427962400.

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8

Heyman, Patrick. "Hemodynamic parameters of patients with treated hypertension and coronary artery disease." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000701.

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9

Azadan, Niaz. "Den diagnostiska säkerheten i arbetsprov på kvinnor med angina pectoris : Slutversion." Thesis, Hälsohögskolan, Jönköping University, HHJ, Avd. för naturvetenskap och biomedicin, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49238.

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Angina pectoris är bröstsmärta orsakat av myokardischemi, till följd av kranskärlsjukdom med eller utan stenoser eller icke kranskärlsjukdom. Arbetsprov är den vanligaste undersökningen för angina pectoris. Diffusa symtom och angina pectoris varianter utan stenoser med låg sensitivitet för elektrokardiografi (EKG) sänker den diagnostiska säkerheten i arbetsprov på kvinnor. Litteraturstudiens syfte var att utreda om hemodynamiska parametrar och riskbedömning med Pre-test sannolikhet (PTP) samt Dukes Löpbands Index (DTS, Dukes Treadmill Score) kan öka den diagnostiska säkerheten i arbetsprov på

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10

Plch, Miroslav. "Stanovení parametrů křivky krevního tlaku." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219532.

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The thesis includes a general introduction to monitoring and measurement of blood pressure of horses, the design of algorithms for pressure curve detection and the calculation of respiratory variabilities in mechanical ventilation under anaesthesia. The first two chapters focus on anatomy, on characteristics of blood flow and on vascular system. Then it deals with the measurement of blood pressure, monitoring of a horse under anaesthesia and it describes particular thermodynamic parameters. In the following part of the thesis, the methods of pressure curve detection are described. The last par

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11

Audebert, Chloé. "Mathematical liver modeling : hemodynamics and function in hepatectomy." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066077/document.

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L’ablation partielle du foie est une chirurgie qui intervient dans le traitement des lésions du foie et lors d’une transplantation partielle de foie. Les relations entre l’hémodynamique du foie, son volume et ses fonctions restent à élucider pour mieux comprendre les causes des complications de ces chirurgies. Lors de la chirurgie, l’hémodynamique du foie est altérée suite à l’augmentation de la résistance au flux sanguin de l’organe. La régénération du foie semble dépendante des changements de débit et de pression dans la veine porte. D’autre part, comme le foie reçoit 25% du débit cardiaque,

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12

Goodie, Jeffrey L. "Using impedance cardiography to examine changes in hemodynamic parameters during heart rate biofeedback." Morgantown, WV : [West Virginia University Libraries], 1998. http://etd.wvu.edu/templates/showETD.cfm?recnum=401.

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Thesis (M.A.)--West Virginia University, 1998.<br>Title from document title page. Document formatted into pages; contains viii, 101 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 53-60).

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13

Shalimova, A., Валентина Григорівна Псарьова, Валентина Григорьевна Псарева, Valentyna Hryhorivna Psarova, and M. Kochuieva. "Features of metabolic and hemodynamic indicators in obese patients with resistant hypertension." Thesis, Wolters Kluwer Health, 2021. https://essuir.sumdu.edu.ua/handle/123456789/85399.

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14

Ghosh, Shilpi. "ASSESSMENT OF MORPHOLOGY AND HEMODYNAMICS IN NORMAL AND REMODELED MICROVASCULATURE WITH PARAMETER SENSITIVITY ANALYSIS." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/437.

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The goal of this study was to compare the morphological and hemodynamic characteristics of normal and remodeled vascular networks in the mouse gracilis muscle. To this end, previously developed models to assess flows and vascular branching were used to assess the normal and remodeled microcirculatory networks. The analysis revealed that the average individual vessel flow rates for vessels of similar caliber and total volumetric flow rates in the networks do not change for vessels of the same caliber after remodeling. Connectivity changes and average diameters primarily change in the larger art

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15

Ozasa, Neiko. "Relation among left ventricular mass, insulin resistance, and hemodynamic parameters in type 2 diabetes." Kyoto University, 2008. http://hdl.handle.net/2433/135807.

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16

Hernandez, Leslie, and Leslie Hernandez. "Renal Perfusion Model: Outcome Predictions." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/624104.

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The Banner University Medical Center's (BUMC) renal transplant program relies on the LifePort Kidney Transporter to optimize marginal kidney organs via hypothermic machine perfusion (HMP) prior to transplantation. Hemodynamic parameters produced by the device followed over the duration of support, combined with clinical experience, guide decisions in determining the acceptability of a donor kidney for implantation. Thus far, statistical evidence supporting ideal parameters remain undefined. The purpose of this study is to create a logistic model that will ascertain the post-implant sustainabil

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17

Gomez, Carrillo Andrea. "Low Frequency Oscillations of Hemodynamic Parameters as a Novel Diagnostic Measure for Traumatic Brain Injury." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1627226821857103.

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18

Brandejs, Yvonne. "The investigation of mechanical and hemodynamic parameters in normoxemia and hypoxemia in hearts of creatine depleted rats." Thesis, University of Ottawa (Canada), 1988. http://hdl.handle.net/10393/5238.

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19

Revie, James Alexander Michael. "Model-based cardiovascular monitoring in critical care for improved diagnosis of cardiac dysfunction." Thesis, University of Canterbury. Mechanical Engineering, 2013. http://hdl.handle.net/10092/7876.

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Cardiovascular disease is a large problem in the intensive care unit (ICU) due to its high prevalence in modern society. In the ICU, intensive monitoring is required to help diagnose cardiac and circulatory dysfunction. However, complex interactions between the patient, disease, and treatment can hide the underlying disorder. As a result, clinical staff must often rely on their skill, intuition, and experience to choose therapy, increasing variability in care and patient outcome. To simplify this clinical scenario, model-based methods have been created to track subject-specific disease and tr

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20

Correia, Nuno Cândido Maia. "" Efect of Acupuncture in Heart Rate Variability and Non-Invasive Hemodynamic Parameters in Patients With Heart Failure - A Clinical Research Protocol "." Master's thesis, Instituto de Ciências Biomédicas Abel Salazar, 2009. http://hdl.handle.net/10216/26906.

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Correia, Nuno Cândido Maia. "" Efect of Acupuncture in Heart Rate Variability and Non-Invasive Hemodynamic Parameters in Patients With Heart Failure - A Clinical Research Protocol "." Dissertação, Instituto de Ciências Biomédicas Abel Salazar, 2009. http://hdl.handle.net/10216/26906.

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22

Puertas, Monica A. "Statistical and Prognostic Modeling of Clinical Outcomes with Complex Physiologic Data." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5106.

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Laboratory tests are a primary resource for diagnosing patient diseases. However, physicians often make decisions based on a single laboratory result and have a limited perspective of the role of commonly-measured parameters in enhancing the diagnostic process. By providing a dynamic patient profile, the diagnosis could be more accurate and timely, allowing physicians to anticipate changes in the recovery trajectory and intervene more effectively. The assessment and monitoring of the circulatory system is essential for patients in intensive care units (ICU). One component of this system is the

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23

KrishnankuttyRema, Resmi. "Quantification and Analysis of the Geometric Parameters of the Total Cavo Pulmonary Connection Using a Skeletonization Approach." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19742.

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The Fontan repair is a three-stage palliative surgical procedure for single ventricle congenital heart diseases, ultimately resulting in the right heart bypass. This is accomplished by routing the systemic venous return directly to the lungs. Although this procedure reduces the mortality rate, its long-term outcome is still considered far from optimal. Over the years several modifications have been suggested, ultimately leading to the total cavopulmonary connection (TCPC), which is the current procedure of choice. A better understanding of the hemodynamics in the TCPC is critical for further o

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24

LACERDA, Maria Albeline Silva de. "Ultrassonografia doppler para parâmetros fluxométricos da artéria uterina média de cadelas em estágios fisiológicos e patológico (Piometra)." Universidade Federal Rural de Pernambuco, 2015. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4695.

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Submitted by Mario BC (mario@bc.ufrpe.br) on 2016-06-13T13:47:43Z No. of bitstreams: 1 Maria Albeline Silva de Lacerda.pdf: 765473 bytes, checksum: c89c99400df21609a6c505748d7ff4d1 (MD5)<br>Made available in DSpace on 2016-06-13T13:47:43Z (GMT). No. of bitstreams: 1 Maria Albeline Silva de Lacerda.pdf: 765473 bytes, checksum: c89c99400df21609a6c505748d7ff4d1 (MD5) Previous issue date: 2015-02-26<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The hemodynamic of uterine arteries and the adequate blood supply are important to the uterine physiology. The aim of thi

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25

Finegold, Judith. "Distal ablation and directly observed medical therapy as potential protocol advancements for renal denervation for hypertension : a study evaluating invasive hemodynamic parameters to predict response to renal denervation." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/49206.

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Aims: (1) Explore the physiological effect of renal denervation (RDN) (2) Explore the efficacy of distal denervation on blood pressure (BP) reduction in patients undergoing directly observed anti-hypertensive therapy (DOT) to minimise measurement bias (3) Evaluate the 6-month safety of distal denervation Methods: Patients with resistant hypertension were recruited and underwent assessment of drug compliance by assaying urinary drug levels. All subsequent measurements were recorded under DOT. Pre-denervation, office and ambulatory BP were measured, and patients underwent bilateral renal angiogr

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26

Tavakkoli, Timon-Amir [Verfasser], Sohrab [Akademischer Betreuer] [Gutachter] Fratz, Peter [Gutachter] Ewert, and Alfred [Gutachter] Hager. "Importance of Hemodynamic Right and Left Ventricular Parameters and CPET-Data in Fallot-Patients and Patients with Fallot-like Pathologies / Timon-Amir Tavakkoli ; Gutachter: Peter Ewert, Sohrab Fratz, Alfred Hager ; Betreuer: Sohrab Fratz." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1114393940/34.

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27

Santana, Joyce Francielle Nei Bomfim de. "O efeito da música na dor e ansiedade em pacientes submetidos a procedimentos cardíacos percutâneos : uma revisão sistemática com metanálise." Pós-Graduação em Enfermagem, 2018. http://ri.ufs.br/jspui/handle/riufs/9087.

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Introduction: Cardiovascular diseases are the leading causes of death in the world. Included in this group, ischemic heart disease (IHD) is more frequent and responsible for high morbidity and mortality rates. Last two decades, a significant progress had happened to the recognition, management and treatment in patients with IHD, which determined a meaningful reduction in death rates, infarctions and recurrent ischemias. Despite technological advancement is increasing and its use of contemporary techniques, pain and anxiety cause a series of physiological repercussions that may impair the quali

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Dionísio, Thiago José. "Polimorfismos genéticos e desempenho físico em jogadores de futebol das categorias de base do São Paulo Futebol Clube." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/1259.

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Made available in DSpace on 2016-06-02T19:22:11Z (GMT). No. of bitstreams: 1 6251.pdf: 2137348 bytes, checksum: c2a00dd9baf672490949a036d79336a8 (MD5) Previous issue date: 2014-09-26<br>Universidade Federal de Minas Gerais<br>Literature reports that genetic polymorphisms may determine important modulations on athletes phenotypes, such as height, cardiovascular adaptations, use of energy substrates as well as electrolyte and hormonal balance. It is possible that individuals who express the alpha actinin 3 gene (ACTN3; ancestral homozygous RR or heterozygous RX) may offer advantages in moveme

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29

Gregová, Daniela. "Hemodynamické parametry cervikálního karotického řečiště fyziologického, stiženého stenózou karotického bulbu a řečiště ošetřeného rekanalizačním výkonem." Doctoral thesis, 2006. http://www.nusl.cz/ntk/nusl-269951.

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With the increasing number of patients suffering from some metabolic diseases leading to the development of atherosclerosis there is an urgent need for early diagnosis of the scale. If we think about disability sclerotic cerebral arteries, the optimal method of investigation is duplex ultrasonography, which is relatively inexpensive and friendly for the patient. To assess not only the structure and extent of atherosclerotic plaque, but also to assess the extent of any narrowing of the arteries and to evaluate the hemodynamic impact of structural changes present. It is an ideal candidate for sc

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Ferreira, Elisabeth Sofia Borges. "Assessment of hemodynamic parameters." Master's thesis, 2008. http://hdl.handle.net/10316/9930.

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Nos últimos anos, diversos estudos realizados apontam a rigidez arterial como a maior causa de risco cardiovascular. Este parâmetro hemodinâmico tem sido amplamente investigado, aparecendo normalmente associado ao aumento da pressão arterial e ao envelhecimento. A medição da velocidade da onda de pulso, VOP, é considerada o método padrão para avaliar a rigidez arterial. Actualmente, apesar de este ser bem aceite pela comunidade médica/científica, os equipamentos que se encontram disponíveis no mercado são bastante onerosos e difíceis de operar, mesmo por profissionais da área. Pelas razõ

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31

Lopes, Tânia Maria Pereira. "Methodologies for hemodynamic parameters assessment." Master's thesis, 2009. http://hdl.handle.net/10316/11365.

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No mundo actual, há uma enorme preocupação em desenvolver e explorar métodos capazes de detectar parâmetros fisiológicos que indiciem riscos ou problemas de saúde. No caso das doenças cardiovasculares, principal causa de morte nos países desenvolvidos, a rigidez arterial é o principal factor de risco. A velocidade de onda de pulso (VOP), ou seja, a velocidade com que a onda de pressão se propaga ao longo de uma artéria, é considerada o método padrão para avaliar a rigidez arterial. Os equipamentos que se encontram disponíveis no mercado são muito dispendiosos, difíceis de operar e com l

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32

Almeida, Vânia Maria Gomes de. "Hemodynamic parameters assessment: an improvement of methodologies." Master's thesis, 2009. http://hdl.handle.net/10316/11364.

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A associação entre a rigidez arterial e as doenças cardiovasculares é um importante tópico de investigação com vista ao conhecimento da condição hemodinâmica dos pacientes. Vários índices podem ser um indicador da rigidez arterial, a velocidade da onda de pulso (VOP) e o índice de aumentação, são dois exemplos. Outros tópicos relacionados com as ondas reflectidas são um poderoso indicador neste contexto. Nesta tese são usados sensores piezoeléctricos para registar a forma da onda de pressão e algoritmos capazes de fornecer informação acerca de certos parâmetros hemodinâmicos, em altern

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33

Capela, Diana Filipa Sousa. "Hemodynamic Parameters Extraction using Laser Speckle Effect." Master's thesis, 2014. http://hdl.handle.net/10316/27998.

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34

Wang, Sheng-Wuei, and 王聖維. "Estimation of Hemodynamic Parameters Using Ultrasonic Contrast Agents." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/71058643821501157354.

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碩士<br>國立臺灣大學<br>電機工程學研究所<br>89<br>In recent years, ultrasonic contrast agents have been widely used to enhance ultrasonic backscattered signals in various imaging modes. However, research on estimating hemodynamic parameters based on traditional indicator-dilution theory with ultrasonic contrast agents is still at an early stage, due to complications encountered in clinical situations. In this thesis, we experimentally investigate the validity of applying the dilution theory under various flow conditions. Both a spherical ball system and a perfusion phantom system are explored. Para

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Lopes, Tânia Maria Pereira. "Non-Invasive Hemodynamic Parameters Assessment using Optoelectronic Devices." Doctoral thesis, 2014. http://hdl.handle.net/10316/26535.

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Tese de doutoramento em Engenharia Biomédica, apresentada à Faculdade de Medicina da Universidade de Coimbra<br>A grande incidência das doenças cardiovasculares no mundo estimulou a procura de novas soluções que permitam a deteção precoce de processos patológicos associados a este tipo de doenças. Especial ênfase foi dada a métodos que permitem a monitorização da pressão arterial e da forma de onda de pressão arterial, que fornecem uma ferramenta precisa que complementa o diagnóstico baseado em múltiplos parâmetros. Da análise das características da forma de onda da pressão arterial, e da sua

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Hsiao, Yi-hui, and 蕭亦蕙. "Hemodynamic Parameter Calculation on Brain Perfusion Magnetic Resonance Images." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/80398353150023297100.

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Almeida, Vânia Maria Gomes de. "New methods for hemodynamic evaluation : a multi-parametric approach." Doctoral thesis, 2013. http://hdl.handle.net/10316/23933.

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Tese de doutoramento em Física, na Especialidade de Física Tecnológica, apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra<br>As doenças cardiovasculares (DCV) são a principal causa de morte mundial, e a rigidez arterial, em particular, é considerada um importante factor de risco. Esta tese encontra a sua motivação no impacto previsível que um instrumento preciso, não invasivo e fácil de usar para avaliação da condição hemodinâmica poderá dar ao diagnóstico e acompanhamento das DCV. Tecnicamente, a abordagem a esta questão baseia-se na crença de que a onda de pressão a

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Relvas, Vânia Patrícia Silva. "Hemodynamic parameters assessment: Characterization of a new piezoectric probe." Master's thesis, 2011. http://hdl.handle.net/10316/17691.

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Ao longo dos últimos anos, a rigidez arterial tem tido um papel importante na avaliação e prevenção de doenças cardiovasculares que, segundo a Organização Mundial de Saúde, representam 30% de todas as mortes globais. A rigidez arterial descreve as propriedades das artérias e pode ser avaliada através de alguns parâmetros hemodinâmicos como a velocidade de onda de pulso (VOP). No Grupo de Electrónica e Investigação, algumas tecnologias têm sido desenvolvidas de modo a avaliar esses parâmetros hemodinâmicos de forma não invasiva, robusta e barata. Estas tecnologias são baseadas em aceleró

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"The Effects of Endovascular Treatment Parameters on Cerebral Aneurysm Hemodynamics." Doctoral diss., 2013. http://hdl.handle.net/2286/R.I.18827.

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abstract: A cerebral aneurysm is an abnormal ballooning of the blood vessel wall in the brain that occurs in approximately 6% of the general population. When a cerebral aneurysm ruptures, the subsequent damage is lethal damage in nearly 50% of cases. Over the past decade, endovascular treatment has emerged as an effective treatment option for cerebral aneurysms that is far less invasive than conventional surgical options. Nonetheless, the rate of successful treatment is as low as 50% for certain types of aneurysms. Treatment success has been correlated with favorable post-treatment hemodynamic

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Contente, Maria Inês Belo Dias Graça. "Hemodynamic parameters assessment: development and characterization of an acoustic probe." Master's thesis, 2011. http://hdl.handle.net/10316/17921.

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A medição da Velocidade de Onda de Pulso (VOP) é considerada a metodologia mais eficaz no diagnóstico da Rigidez Arterial, o maior factor de risco de doenças Cardiovasculares. No entanto, os equipamentos disponíveis hoje em dia no mercado são muito dispendiosos e exigem a manipulação por operadores treinados. Neste sentido, este projecto de investigação centrou-se no desenvolvimento de uma nova sonda dupla, baseada em dois sensores acústicos e na sua caracterização. O principal objectivo da sonda proposta é a determinação da VOP. No entanto permite também a determinação do Tempo de Ejec

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Borges, Pâmela Cristina Carvalho. "Development of a new electromechanical probe for hemodynamic parameters assessment." Master's thesis, 2014. http://hdl.handle.net/10316/28097.

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Dissertação de Mestrado em Engenharia Biomédica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.<br>As doenças cardiovasculares (DCVs) causam milhões de mortes todos os anos, sendo a principal causa de morte no mundo inteiro. A hipertensão é um dos mais relevantes factores de risco das doenças cardiovasculares. Assim sendo, é muito importante o desenvolvimento de um método de diagnóstico que seja barato, fácil utilização, preciso e capaz de detectar alterações precoces da performance do sistema cardiovascular, permitindo, desta forma, aumentar a probabilidade de so

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Bo-WenLin and 林博文. "Validation of Model-based Identification Methods for Estimating Individual Hemodynamic Parameters." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/65003485109997737993.

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博士<br>國立成功大學<br>航空太空工程學系<br>102<br>A reliable, non-invasive diagnostic tool for assessing cardiovascular characteristics and/or the connected end organ health state is still lacking. The present work aims at developing an identification procedure for estimating individual hemodynamic parameters based on a one-dimensional (1-D) tree-like vascular flow model. With the use of clinically available measurements, the proposed identification methods solve the hemodynamic inverse problem associated with the modeled vascular system, yielding the estimates of the unknown model parameters that are of cli

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Chew, Sew-Li, and 周秀莉. "Effects of Magnesium supplementation on cerebral hemodynamic parameters and cognitive function." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2ccw6b.

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碩士<br>國立臺灣大學<br>生化科技學系<br>107<br>This study intended to evaluate the short-term effect of magnesium supplement at a Daily Recommended Index (DRI) level on cognitive function and on certain hemodynamic parameters. This study aimed to recruit cognitively impaired participants aged 60 and over who determined cognitive scores ≤ 26 using Mini-Mental State Examination (MMSE). Using a double-blind randomized placebo-controlled intervention trial design, participants were divided into magnesium intervention group and placebo group. Both groups were evaluated by Montreal Cognitive Assessment (MoCA),

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Li, Cheng-Feng, and 李承鋒. "Through Curve Fitting to Find Hemodynamic Parameters from Perfusion Magnetic Resonance Images." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/89794950585896989267.

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碩士<br>國立陽明大學<br>放射醫學科學研究所<br>94<br>Hemodynamic parameters such as relative cerebral volume (rCBV), relative cerebral blood flow (rCBF), and mean transit time (MTT) are assessed using dynamic susceptibility contrast MRI (DSC-MRI). The rCBF and MTT can be determined by deconvolution with an arterial input function(AIF). However, the singular value decomposition (SVD) deconvolution method is sensitive to the tracer delay that it often occurs in patients with cerebrovascular disease. We investigated the effect of tracer delay on rCBF determined by SVD deconvolution. Simulation study showed that sh

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Ponticorvo, Adrien. "Novel optical techniques for imaging oxygen and other hemodynamic parameters during physiological events." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2044.

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This dissertation presents the development and use of a novel optical imaging system capable of monitoring changes in blood flow, oxygenated hemoglobin, deoxygenated hemoglobin, and absolute pO₂ in the brain. There are several imaging modalities capable of monitoring these parameters separately. Laser speckle contrast imaging (LSCI) and multi-spectral reflectance imaging (MSRI) have been used to monitor relative blood flow and hemoglobin changes respectively. Phosphorescence quenching, while not typically used for imaging, is capable of noninvasive measurements of pO₂. Combining these three te

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Vaz, Pedro Guilherme da Cunha Leitão Dias. "Methods for hemodynamic parameters measurement using the laser speckle effect in macro and microcirculation." Doctoral thesis, 2016. http://hdl.handle.net/10316/32121.

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Tese de doutoramento em cotutela, na área de Engenharia Biomédica, apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra e à Université Angers - França<br>Laser speckle is an interference eﬀect that has been considered as a main drawback in the use of coherent light sources. However, for a specific set of applications, this eﬀect is used as source of information. Among these applications we can ﬁnd the biomedical ones. Laser speckle has been used for decades for microvascular blood ﬂow monitoring but only now starts to be considered as a method that can also be used for m

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Cho, I.-Chieh, and 卓怡潔. "Through the thresholding techniques to remove vessel pixels and provide more accurate hemodynamic parameters." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/50161678154007777699.

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碩士<br>國立陽明大學<br>生物醫學影像暨放射科學系暨研究所<br>99<br>Purpose：A thresholding technique was applied to the relative cerebral blood volume (CBV) and relative cerebral blood flow (CBF) images for removing voxels either containing vessels or near vessels. Scaling factors were calculated for converting relative CBV and relative CBF values to absolute values. Quantitative measurements of CBV and CBF on brain parenchyma were improved. Material and methods：The independent component analysis technique was utilized to segment the arterial region on brain perfusion MRI for normal subjects and patients with stenosis,

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Khan, Md Monsurul Islam. "Image Based Computational Hemodynamics for Non-Invasive and Patient-Specific Assessment of Arterial Stenosis." Thesis, 2019. http://hdl.handle.net/1805/19906.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>While computed tomographic angiography (CTA) has emerged as a powerful noninvasive option that allows for direct visualization of arterial stenosis(AS), it cant assess the hemodynamic abnormality caused by an AS. Alternatively, trans-stenotic pressure gradient (TSPG) and fractional flow reserve (FFR) are well-validated hemodynamic indices to assess the ischemic severity of an AS. However, they have significant restriction in practice due to invasiveness and high cost. To fill the gap, a new computational modality, called InVascular h

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Barros, Maria Inês Marques da Silva Figueiredo de. "Impact of sleep onset on hemodynamic parameters in obese humans : the influence of obstructive sleep apneas." Master's thesis, 2015. http://hdl.handle.net/10451/25822.

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Trabalho Final do Curso de Mestrado Integrado em Medicina, Faculdade de Medicina, Universidade de Lisboa, 2015<br>Introduction: Blood pressure, cardiac output, heart rate and stroke volume are influenced by the sleep-wake cycle. Healthy subjects have a decrease in blood pressure associated with sleep onset (SO). Patients with Obstructive Sleep Apnea (OSA) often lack this reduction. Obesity is a major risk factor for OSA, and it is not clear if obese patients without OSA demonstrate this dipping. The aim of this study is to investigate the hemodynamic changes during SO in an obese population wi

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Belkhatir, Zehor. "Estimation Methods for Infinite-Dimensional Systems Applied to the Hemodynamic Response in the Brain." Diss., 2018. http://hdl.handle.net/10754/627828.

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Infinite-Dimensional Systems (IDSs) which have been made possible by recent advances in mathematical and computational tools can be used to model complex real phenomena. However, due to physical, economic, or stringent non-invasive constraints on real systems, the underlying characteristics for mathematical models in general (and IDSs in particular) are often missing or subject to uncertainty. Therefore, developing efficient estimation techniques to extract missing pieces of information from available measurements is essential. The human brain is an example of IDSs with severe constraints on i

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