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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 altitude decompression procedures and development of new decompression strategies

Egi, Salih Murat. (Thesis (Ph.D.) - Bogazici University. Institute of Biomedical Engineering, 1999., 1999.)

Diving at altitude requires different tables than at sea level due to the reduction in surface level ambient pressure. In this work, the rationale for the algorithms extrapolating the sea level diving data are reviewed. ...
A model of active and attentive vision

Soyer, Çağatay. (Thesis (Ph.D.) - Bogazici University. Institute of Biomedical Engineering, 2002., 2002.)

Biological vision systems explore their environment by allocating their resources to interesting parts of a scene, using both physical and mental attention mechanisms. The result of this active and attentive vision behavior ...
3-D gamma knife distribution by normoxic gel dosimetry near tissue inhomogeneties

İşbakan, Fatih. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2005., 2005.)

The primary goal in this study was to investigate the three dimensional dose distributions, near the areas of tissue inhomogeneities, in Gamma Knife Radiosurgery with the normoxic gel dosimetry. Following irradiation, when ...
Modeling of physiolsgical properties of stored human blood by complex impedance measurements

Sezdi, Manâ. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate of Biomedical Engineering, 2006., 2006.)

In this study, the relationship between physiological properties of human blood,namely Na+, K+, Cl- concentrations, pH, 2,3-DPG and ATP, and its electrical parameters,the Cole-Cole parameters- the resistance of the ...
Biological effects of electromagnetic fields at mobile telecommunication frequencies

Yürekli, Ali İhsan. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2006., 2006.)

The increasing use of cellular phones and increasing number of base stations are becoming awidespread source of non-ionizing electromagnetic radiation. The immediate biological effectof electromagnetic (EM) radiation is ...
Lesion detection in MR mammography: NMITR maps, dynamic and morphological descriptors

Ertaş, Gökhan. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

In this thesis, algorithms, methods and techniques for dynamic contrast-enhanced magnetic resonance mammography (DCE-MRM) have been investigated to maximize sensitivity, specificity and reproducibility of breast cancer ...
Three dimensional modeling of the knee joint: prediction of ligament related gait abnormalities

Akalan, N. Ekin. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2007., 2007.)

The purpose of this study is to investigate the affect of anterior bundle of ACL (aACL), anterior portion of posterior cruciate ligament PCL (aPCL), anterior and deep portions of MCL (aMCL, dMCL) and the tibiofemoral ...
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 ...
Multimodal investigation of fMRI and fNIRS derived breath hold BOLD signals with an expanded balloon model

Emir, Uzay Emrah. (Thesis (Ph.D.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

Multimodal investigation of blood oxygenation level-dependent (BOLD) signal, using both functional near infrared spectroscopy (fNIRS) and functional magnetic resonance imaging (fMRI), may give further insight to the ...
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 ...
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 ...
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. ...

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