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M.S. Theses: Recent submissions

Now showing items 281-300 of 336

Analysis of tracheal sounds acquired from patients with lung cancer

Karaaslan, Fatih. (Thesis (M.S.) - Bogazici University. Institute of Biomedical Engineering, 1995., 1995.)

In this study an attempt has been made to determine the quantitative characteristics of the sounds which are caused by the presence of a tumor in the bronchial tree. For this purpose, a special instrumentation system ...
Effects of epimuscular myofascial force transmission on sensory level: experimental assessment by afferent signals received from frog lower leg muscles

Arıkan, Önder Emre. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

It has shown that non-tendinous structures play a major role in force transmission: epimuscular myofascial force transmission. Such force transmission was shown to cause substantial stain distributions along muscle fibers ...
Evaluating diagnostic loss in compressed medical images using computer simulation

Koç, Alpaslan. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

The objective of this thesis is to evaluate the diagnostic loss in compressed medical images using computer simulation. Compressing medical images is a necessity due to the cost of the storage medium as well as the low ...
Investigation of neurovascular coupling by synchronous EEG and fNIRS measurements during steady-state visual stimuli

Özker, Müge. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

In this thesis, the steady state human visual evoked potentials that are generated in response to visual stimulation and its corresponding hemodynamic response are investigated via electroencephalography (EEG) and functional ...
Classification of ECG arryhtmia beats with artifical neural networks

Zeybekoğlu, Seçil. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

Electrocardiography (ECG) is very useful noninvasive imaging method of the heart's electrical activity. Based on these recordings, a wide range or heart conditions can be diagnosed. These conditions may vary from minor to ...
Multimodal segmentation of brain MR images through hidden Markov random fields

Mat, Ufuk. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

Segmentation of brain MR images, especially into three main tissue types: CSF, GM and WM, is an essential task in clinical applications as it aids surgical planning, computer-aided neurosurgery and diagnosis. However, every ...
The side effects of different antiembolic agents on the fracture healing and micro-mechanical behavior of the fractured bone

Tunç, Burcu. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

Fracture of bone is always expected when the stress exposed to body is enough for initiation and propagation of the crack. Due to social lives, increase of life expectancy, wars and accidents the number of bone fracture ...
Ceramic bracket debonding with infrared lasers

Sarp, Ayşe Sena Kabaş. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

Orthodontics is a specialized branch of dentistry aiming to produce a healthy, functional bite, creating greater resistance to disease and improving personal appearance. Orthodontic brackets are small attachments used in ...
GUI driven sigma-delta modulator design and measurement tool with a view of medical ultrasound imaging implementation

Altınok, Güneş Damla. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

The widespread use of mixed-signal based systems in conjunction with the various bene ts provided by digital techniques have signi cantly increased the need for high resolution analog-to-digital (A/D) and digital-to-analog ...
3 D display of organs using CT data implementation on an IBM PC

Hüner, Mutlu. (Thesis (M.S.)- Bogazici University. Institute of Biomedical Engineering, 1987., 1987.)

This thesis presents a low cost software package for the three dimensional display of organs using an IBM microcomputer.First existing 3D display techniques and their application in medicine are given. Then the particular ...
The effects of serotonin and its antagonists on slowly adapting type I mechanoreceptive fibers in frog skin

Mutlu, Sevinç. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

It was intended to investigate serotonin as the neurotransmitter between Merkel cell and its nerve ending, through changes in SA-I response to exogenically applied serotonin and its antagonists. Single-unit electrophysiological ...
A device for functional and cosmetic improvement of lagophtalmos due to facial paralysis

Aşık, Mehmet Doğan. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

A new device for the correction of eyelid problems due to facial palsy was studied. Lagophthalmos is the condition of the paralyzed eyelids' to close totally. It may cause drying and irritation .In this thesis, 14 rabbits ...
Pure tone audiometer design

Arpat, Yusuf. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

Audiometry ia a technique which is used to measure where the hearing deficit stems from in aural way and whwt the degree of severity of deficit is. This thesis work basically focused on a prototype of pure tone audiometer ...
Optical probe design for continuous wave near-infrared spectroscopy

Evcil, Kadir. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

The modern medicine is using optical methods more and more every day, among optical methods Near-infrared Spectroscopy is one of the most appealing techniques. Near-infrared spectroscopy is a noninvasive, safe, reliable ...
Somatosensory brain responses evoked by vibrotactile stimulation of the distal phalanx in normal subjects

Torun, Duygu. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

The sensory response upon vibrotactile stimuli is still not completely understood. Previously, the responses of single units from mechanoreceptive a erents and cortical neurons have been studied. On the other hand, there ...
Investigating brain hemodynamics of schizophrenic patients by functional near infrared spectroscopy

Serap, Sinem. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

People can easily stop talking, walking, singing and so on, in response to changes in internal or environmental states. The ability to respond to a specific dimension of a stimulus while suppressing simultaneous inappropriate ...
Simulation of optical and thermal responses of laser irradiated tissue

Kurt, Bahar. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

A Java Simulation Application was developed to simulate optical and thermal response of laser irradiated tissue by using Monte Carlo and Finite Difference Methods. For light propagation Monte Carlo was preferred according ...
Differential effects of short light pulses in the dark phase of an L/D cycle on behavioral despair in male wistar rats

Aydın, Elif. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

The present study investigated the effect of a 10-min light pulse either early or late in the dark phase of the L/D cycle on behavioral despair in male Wistar rats. Independent groups of rats (n=8 each) maintained on a ...
Infrared lasers for corneal tissue welding

Rasier, Rıfat. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

Objective of this study is to investigate the potential of infrared lasers for cornea welding in order to seal corneal cuts done during cataract surgery. Infrared lasers can be used to weld soft tissues. Water molecules ...
Hemodynamic correlates of mental arithmetic task in migraine

Ünlü, Ebru. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

Investigating the relationship between the hemodynamic changes and cognitive activity (known as the neurovascular coupling) provides a basis of the underlying physiology of the brain energy mechanisms. The aim of this study ...

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