Quantitative Mr Imaging Of The Electric Properties And Local Sar Based On Improved Rf Transmit Field Mapping
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Quantitative Mr Imaging Of The Electric Properties And Local Sar Based On Improved Rf Transmit Field Mapping
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Author : Tobias Voigt
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-08-18
Quantitative Mr Imaging Of The Electric Properties And Local Sar Based On Improved Rf Transmit Field Mapping written by Tobias Voigt and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-08-18 with Technology & Engineering categories.
This work presents three new quantitative methods for magnetic resonance imaging. A method for simultaneous mapping of B1 and T1 (MTM) is developed and validated. Electric Properties Tomography (EPT), a method for quantitative imaging of dielectric properties of tissue, is presented. Based on EPT, separate (phase-based) conductivity and (amplitude-based) permittivity measurements are introduced. Finally, a B1-based method for patient-specific local SAR measurements is presented.
Molecular Plasmonics
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Author : Volodymyr I. Chegel
language : en
Publisher: Jenny Stanford Publishing
Release Date : 2020-11-18
Molecular Plasmonics written by Volodymyr I. Chegel and has been published by Jenny Stanford Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-11-18 with Technology & Engineering categories.
This book summarizes the results of studies of molecules and molecular complexes using techniques based on surface plasmon resonance (SPR) in a novel scientific direction called molecular plasmonics. It presents the current state of investigations in the field of molecular plasmonics and discusses its two main physical phenomena: surface plasmon–polariton resonance (SPPR) and localized SPR (LSPR). Among the mathematical methods for the calculation of plasmonic systems response, the book emphasizes models based on the transfer-matrix method, Green function formalism, Mie scattering theory, and numerical methods. It considers the possibilities of the SPPR technique for registering conformational changes, surface plasmon–mediated photopolymerization, electrochemical processes, as well as reversible optoelectronic and physicochemical properties during investigation of molecular systems. It describes applications of the LSPR method, including creation of metamaterials, surface-enhanced fluorescence, and bio- and chemosensing using noble metal nanoparticles in colloidal, array, and composite polymeric film formats. It also highlights the development and applications of plasmonic nanochips.
Quantifying Morphology And Physiology Of The Human Body Using Mri
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Author : L. Tugan Muftuler
language : en
Publisher: Taylor & Francis
Release Date : 2013-05-02
Quantifying Morphology And Physiology Of The Human Body Using Mri written by L. Tugan Muftuler and has been published by Taylor & Francis this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-05-02 with Medical categories.
In the medical imaging field, clinicians and researchers are increasingly moving from the qualitative assessment of printed images to the quantitative evaluation of digital images since the quantitative techniques often improve diagnostic accuracy and complement clinical assessments by providing objective criteria. Despite this growing interest, th
Sar Prediction And Sar Management For Parallel Transmit Mri
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Author : Hanno Homann
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-07-30
Sar Prediction And Sar Management For Parallel Transmit Mri written by Hanno Homann and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-30 with Technology & Engineering categories.
Parallel transmission enables control of the RF field in high-field Magnetic Resonance Imaging (MRI). However, the approach has also caused concerns about the specific absorption rate (SAR) in the patient body. The present work provides new concepts for SAR prediction. A novel approach for generating human body models is proposed, based on a water-fat separated MRI pre-scan. Furthermore, this work explores various approaches for SAR reduction.
Ecg Based Analysis Of The Ventricular Repolarisation In The Human Heart
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Author : Baas, Tobias
language : en
Publisher: KIT Scientific Publishing
Release Date : 2012-08-06
Ecg Based Analysis Of The Ventricular Repolarisation In The Human Heart written by Baas, Tobias and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-08-06 with Technology & Engineering categories.
ECG recordings provide diagnostic relevant information on the de- and repolarisation sequences of the heart. A modification of the repolarisation sequence is assumed to cause Torsades de Pointes. Especially drug induced effects on the repolarisation processes are in focus, since some non-cardiac drugs have been associated with sudden cardiac death in the 1990s.The analysis of the ventricular repolarisation using a set of parameters depicting the morphology of the T-wave is introduced in this work. Therefore, new methods of fully automatic patient-specific QRS detection, beat classification and precise T-wave delineation are presented. Using these methods, medical studies are investigated regarding the modification of the T-wave by different compounds. Also the impact of the heart rate on the morphology of the T-wave is part of this research.The reliable identification of ventricular ectopic beats allows an analysis of the influence of these beats on subsequent heart beats. It turned out that the morphology of subsequent heart beats can significantly be changed. This might give new information on the proarrythmical risk of ventricular ectopic beats.
Ecg Imaging Of Ventricular Activity In Clinical Applications
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Author : Schulze, Walther H. W.
language : en
Publisher: KIT Scientific Publishing
Release Date : 2015-08-12
Ecg Imaging Of Ventricular Activity In Clinical Applications written by Schulze, Walther H. W. and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-12 with Technology (General) categories.
ECG imaging was performed in humans to reconstruct ventricular activation patterns and localize their excitation origins. The precision of the non-invasive reconstructions was evaluated against invasive measurements and found to be in line with the state-of-the-art literature. Statistics were produced for various excitation origins and reveal the beat-to-beat robustness of the imaging method.
Modeling Human Atrial Patho Electrophysiology From Ion Channels To Ecg Substrates Pharmacology Vulnerability And P Waves
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Author : Loewe, Axel
language : en
Publisher: KIT Scientific Publishing
Release Date : 2016-08-03
Modeling Human Atrial Patho Electrophysiology From Ion Channels To Ecg Substrates Pharmacology Vulnerability And P Waves written by Loewe, Axel and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-03 with categories.
Personalized Multi Scale Modeling Of The Atria Heterogeneities Fiber Architecture Hemodialysis And Ablation Therapy
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Author : Martin Wolfgang Krüger
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-05-22
Personalized Multi Scale Modeling Of The Atria Heterogeneities Fiber Architecture Hemodialysis And Ablation Therapy written by Martin Wolfgang Krüger and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-22 with Technology & Engineering categories.
This book targets three fields of computational multi-scale cardiac modeling. First, advanced models of the cellular atrial electrophysiology and fiber orientation are introduced. Second, novel methods to create patient-specific models of the atria are described. Third, applications of personalized models in basic research and clinical practice are presented. The results mark an important step towards the patient-specific model-based atrial fibrillation diagnosis, understanding and treatment.
Multiscale Modeling Of Cardiac Electrophysiology Adaptation To Atrial And Ventricular Rhythm Disorders And Pharmacological Treatment
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Author : Mathias Wilhelms
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-05-22
Multiscale Modeling Of Cardiac Electrophysiology Adaptation To Atrial And Ventricular Rhythm Disorders And Pharmacological Treatment written by Mathias Wilhelms and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-22 with Technology & Engineering categories.
Multiscale modeling of cardiac electrophysiology helps to better understand the underlying mechanisms of atrial fibrillation, acute cardiac ischemia and pharmacological treatment. For this purpose, measurement data reflecting these conditions have to be integrated into models of cardiac electrophysiology. Several methods for this model adaptation are introduced in this thesis. The resulting effects are investigated in multiscale simulations ranging from the ion channel up to the body surface.AbstractEnglisch = Multiscale modeling of cardiac electrophysiology helps to better understand the underlying mechanisms of atrial fibrillation, acute cardiac ischemia and pharmacological treatment. For this purpose, measurement data reflecting these conditions have to be integrated into models of cardiac electrophysiology. Several methods for this model adaptation are introduced in this thesis. The resulting effects are investigated in multiscale simulations ranging from the ion channel up to the body surface.
Formation Of Intracardiac Electrograms Under Physiological And Pathological Conditions
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Author : Keller, Matthias
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-09-09
Formation Of Intracardiac Electrograms Under Physiological And Pathological Conditions written by Keller, Matthias and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-09 with Technology & Engineering categories.
This work presents methods to advance electrophysiological simulations of intracardiac electrograms (IEGM). An experimental setup is introduced, which combines electrical measurements of extracellular potentials with a method for optical acquisition of the transmembrane voltage in-vitro. Thereby, intracardiac electrograms can be recorded under defined conditions. Using experimental and clinical signals, detailed simulations of IEGMs are parametrized, which can support clinical diagnosis.