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Biyomedikal Mühendisliği Enstitüsü: Recent submissions

Now showing items 81-100 of 423

Skin tissue welding with near infrared lasers: investigation of the optimal parameters

Tabakoğlu, Haşim Özgür. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2010., 2010.)

Laser tissue welding/soldering is an alternative to conventional closure techniques in surgery. In the present study, the closure capability and the contribution to recovery period of laser welding techniques were investigated ...
A neurovascular coupling model based on nitric oxide and carbon dioxide and its validation with two-photon microscopy imaging

Yücel, Meryem Ayşe. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2010., 2010.)

Understanding neurovascular coupling is of paramount importance since while a normal coupling is vital for a healthy functioning brain, the impairment in coupling is the underlying factor of many neurodegenerative diseases. ...
Photofrin and indocyanine green-mediated photodynamic therapy in cancer treatment

Bozkulak, Özgüncem. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2010., 2010.)

Photodynamic therapy (PDT) is a minimally invasive therapeutic approach for clinical treatment of cancer. PDT-mediated oxidative stress leads to cell death and can elicit the expression of genes associated with cell survival, ...
İnvestigation of the alterations in motor units in neurologic disorders by scanning electromyography

Göker, İmran. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

In this study, the alterations in the length of cross-sections of MU and the changes in maximum amplitude of MUAPs in each MU in patients with JME were investigated. An experimental setup of scanning EMG was built and 3-D ...
Clinical grade active guidewire and catheter for interventional cardiovascular MRI

Kocatürk, Özgür. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

The success and safety of interventional magnetic resonance imaging (MRI) procedures requires conspicuous intravascular instruments that can be distinguished from surrounding tissues. In this dissertation work, an "active" ...
Accuracy improvements of NIRS and investigation of muscle oxidative metabolism

Şayli, Ömer. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

In the rst part of the thesis, the e ect of fat layer on continuous wave near infrared spectroscopy (cw-NIRS) measurements were investigated in detail, both in terms of underestimation error (caused by homogeneous medium ...
Advanced computational tools for real-time MR imaging

Saybaşılı, Haris. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

Real-time Magnetic Resonance Imaging (MRI) has the potential of successfully guiding interventional applications. Overall, the requirements of real-time MRI can be categorized as: (i) fast data acquisition, (ii) fast image ...
The nanostructural role of water in lamellar bone and its implications on osteonal bone mechanics: a micrographic and optomechanical study

Utku, Feride Şermin. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

The microstructural organization of water in bone was investigated using the environmental scanning electron microscope to analyze the dimensional changes that occur during dehydration of equine osteonal bone. In longitudinal ...
The effect of dialysis environment and the clinical state of patients with chronic kidney failure on the high flux dialyzers

Aksoy, Mehmet Emim. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

In order to optimize the renal replacement therapies many researches have been going on for many years. The tendency for dialysis therapy is towards high flux hemodialysis in the last few years. For understanding the ...
Modeling and clustering analysis of pulmonary crackles

Yeğiner, Mete. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

The objective of this study is to perform two complementary analyses of pulmonary crackles, i.e. modeling and clustering, in order to interpret crackles in timefrequency domain and also determine the optimal number of ...
Development of a new orthosis (neuro-orthosis) for the control of wrist movements in patients with carpal tunnel syndrome

Uğurlu, Ümit. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

Static wrist orthoses (SWOs) are used in carpal tunnel syndrome (CTS) with some drawbacks. As an alternate approach, an active closed-loop wrist control strategy was proposed to limit wrist movements. It was based on the ...
Statistical analysis of cognitive signals measured by fNIRS

Çifçi, Rifat Koray. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

Further standardization in signal processing tools is needed in the area of functional near infrared spectroscopy (fNIRS) before it is recognized as a reliable neuroimaging modality. This thesis study attempts to present ...
The mechanical and biological performance of the alternating sliding knots with different patterns in abdominal wound closure

Babetty, Zeina. (Thesis (Ph.D.) - Bogazici University. Institute of Biomedical Engineering, 1998., 1998.)

New knot configurations, consisting of alternating strands with different patterns, have been studied from mechanical and biological perspectives in order to determine whether they would be suitable for abdominal surgery, ...
Evaluation of local oxygen consumption in human flexor digitorum suoerficialis muscle by near infrared spectroscopy

Erdoğan, Sinem Burcu. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

A strong relationship between mechanical and physiological conditions of skele- tal muscle determines the force generated by that muscle. The aim of this study was to evaluate the relationship between local oxygen consumption ...
The effect of methylphenidate on brain hemodynamics of attention-deficit/hyperactivity disorder measured by functional near infrared spectroscopy

Topaloğlu, Nermin. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

Attention-deficit/hyperactivity disorder (ADHD) is a very common neurodevelopmental disorder. Approximately 30% 60% of individuals diagnosed with ADHD in youth have symptoms that persist into adulthood. This neurobehavioral ...
Building a measurement setup for the investigation of acoustic cavitations for medical applications

Erdem, Şener. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

Various noninvasive medical treatments rely on high intensity ultrasound or shock waves. The externally generated pressure waves transfer a large amount of energy into the body. There is evidence that in all of these ...
Magnitude estimation by the non-pacinian I tactile channel

Dinçer, Şeref Mete. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

Psychophysical responses to mechanical stimuli were measured to study the sense of touch. By using a forward-masking procedure on eight subjects, magnitude estimation was performed by activating the Non-Pacinian I tactile ...
Design of the biomedical calibration laboratory quality manual for EN 17025: 2005

Doğu, Hande. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

According to the New Approach Directives, the CE Marking is obligatory for medical products: the manufacturer affixes this marking in order to be allowed to sell his product in the European market. CE marked devices can ...
Design of a wide range kVp-meter

Tümer, Murat. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

The kVp setting is one of the major factors affecting the image quality in X-ray imaging and should be annually measured and calibrated if necessary. In this thesis, a kVp-meter is designed and a prototype unit was built ...
Design of a Wi-Fi based electrocardiography monitoring system

Kocatürk, Mehmet. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

The objective of this project is to design a wireless ECG monitoring system which enables the tracking of ambulatory patients' cardiac activities on a central server. A developed software run on a server and the client ...

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