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Recent submissions

Biyomedikal Mühendisliği Enstitüsü: Recent submissions

Toplam kayıt 423, listelenen: 381-400

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 ...
Implementation and statistical evaluation of computer assisted TW2 method for bone age assessment

Güven, Esra. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2009., 2009.)

The most commonly used method for bone age assessment is based on a single x-ray of the hand and wrist. The bones in the x-ray are compared to the bones of a standard atlas, usually "Greulich and Pyle (G&P)". A more complex ...
Fiber optic based continuous wave functional near infrared spectroscopy system

Özkerim, Barış. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

In the last decade, functional near-infrared spectroscopy (fNIRS) has been introduced as a new neuroimaging modality with which to conduct functional brain studies that require data collection from vision center or motor ...
Basic standards of radiation protection in nuclear medicine

Sayman, Haluk B. (Thesis (M.S.) - Bogazici University. Institute of Biomedical Engineering, 1986., 1986.)

In this study, the basic standards of radiation protection during routine examinations of Nuclear Medicine or in case of any accident that can happen are explained . The precautions in safe handling of radioisotopes and ...
Evaluation of force-velocity characteristics of quadriceps muscles by means of peak torque-angular velocity relationship during knee extension and flexion

Akkılık, Abdulaziz. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

In this thesis, an experiment, which shows that there is a relationship between theoretical force-velocity characteristics of a muscle fiber and experimental peak torqueangular velocity characteristics of quadriceps muscle ...
Partial fasciotomy has major effects on muscular mechanics due to altered epimuscular myofascial force transmission

Hocaoğlu, Gülay. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

In remedial orthopedic surgery (e.g., aponeurotomy), partial fasciotomy is widely applied; however, is seen as a preliminary step to the main operation only. It is aimed at studying the effects of partial fasciotomy on ...
Magnetic resonance imaging of cerebral perfusion using DSC and ASL techniques at 3T

Özyurt, Onur. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

Magnetic resonance imaging (MRI) of cerebral perfusion is used as a complementary procedure in diagnosis of cerebral lesions. In this work, cerebral perfusion and perfusion related parameters are measured in terms of ...
An internet based system for monitoring patients and relatives' satisfaction rates in health services

Demirci, Ufuk. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

The aim of the study is to develop an internet based dashboard system for monitoring health key performance indicators (KPI) to improve medical services quality with a benchmarking framework. The study implements "patients ...
A fiducial-based automatic registration method for X-ray imaging fused with MRI

Sönmez, Merdim. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

X-ray fluoroscopy is widely used in image-guided interventions especially in catheter-based interventions. X-ray fluoroscopy provides high temporal and spacial resolution, but it suffers from low soft tissue contrast. On ...
Effects of aponeurotomy on mechanics of muscle with intact neighboring muscular and nonmuscular structures

Yaman, Bora. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

Aponeurotomy (AT) is a surgical technique used to lengthen spastic and/or short muscles. In previous studies, the biomechanical effects of AT were studied both experimentally and by finite element modeling in isolated ...
The effect of dialysis environment and reprocessing procedure on the mechanical and structural stability of high flux polysulfone membrane

Yılmaz, Bengi. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

Although there are many clinical researches inthe open literature, biocompatibility and performance of reprocessed hemodialysis membranes are not still well defined. This thesis aims to fulfill yhe deficiency in the ...
The effect of reuse solution on the high flux polyamide hollow fiber membranes in hemodialysis

Sarıca, Neslihan. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

In order to question the safety of reuse of high flux polyamide hollow membranes used for hemodialysis, it is imperative to perform several experiments on both virgin high flux polyamide membranes and used fibers left in ...
Evaluation of the effect of aging on brain asymmetry with functional near infrared spectroscopy

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

Cognitive aging is a natural and lifelong process which may lead to the neurological diseases as dementia and Alzheimer’s. Investigation of the aging process on the cerebral hemodynamics of subjects would lead to the ...
Asynchronous processing of luminance difference and motion in visual perception

İşcan, Onur. (Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2008., 2008.)

This study is related with the perception of first-order motion. The processing of visual information in the human brain is accomplished by numerous visual streams. Each stream is specialized to process different attributes ...

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