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Bioimaging and Biomedical Optics Commons

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257 full-text articles. Page 1 of 10.

Lipid Detection In Pig Arteries Using Intravascular Photoacoustic Imaging, Jieying Mai, Yingchun Cao, Ayeeshik Kole, Michael Sturek, Ji-Xin Cheng 2016 Purdue University

Lipid Detection In Pig Arteries Using Intravascular Photoacoustic Imaging, Jieying Mai, Yingchun Cao, Ayeeshik Kole, Michael Sturek, Ji-Xin Cheng

The Summer Undergraduate Research Fellowship (SURF) Symposium

Heart disease is the leading cause of death in the United States and worldwide. Each year over 370,000 people died from coronary artery disease in America. As the primary form of coronary artery disease, atherosclerosis behaves as lipid-rich plaque development inside an artery wall. Vulnerable plaques are those prone to rupture, which may result in thrombus or even death. Typical hallmarks of a vulnerable plaque include thin fibrous cap, a large lipid-rich necrotic core and inflammatory infiltrate. The identification and accurate detection of these lipid depositions in the arterial wall is crucial in the diagnosis of atherosclerosis. However, none ...


3d Modeling Of Murine Abdominal Aortic Aneurysms: Quantification Of Segmentation And Volumetric Reconstruction, Paula A. Sarmiento, Amelia R. Adelsperger, Craig J. Goergen Ph.D. 2016 Universidad de Los Andes - Colombia

3d Modeling Of Murine Abdominal Aortic Aneurysms: Quantification Of Segmentation And Volumetric Reconstruction, Paula A. Sarmiento, Amelia R. Adelsperger, Craig J. Goergen Ph.D.

The Summer Undergraduate Research Fellowship (SURF) Symposium

Abdominal Aortic Aneurysms (AAA) cause 5,900 deaths in the United States each year. Surgical intervention is clinically studied by non-invasive techniques such as computed tomography and magnetic resonance imaging. However, three-dimensional (3D) ultrasound imaging has become an inexpensive alternative and useful tool to characterize aneurysms, allowing for reconstruction of the vessel, quantification of hemodynamics through computational fluid dynamics (CFD) simulation, and possible prediction of aortic expansion and rupture. However, current analysis techniques for these images require the use of multiple software platforms for either modeling or simulation, prompting the need for alternatives to improve data processing. This study monitors ...


Combining Real-Time Fmri Neurofeedback Training Of The Dlpfc With N-Back Practice Results In Neuroplastic Effects Confined To The Neurofeedback Target Region, Matthew Sherwood, Michael Patrick Weisend Ph.D., Jessica Kane, Jason G. Parker 2016 Wright State University - Main Campus

Combining Real-Time Fmri Neurofeedback Training Of The Dlpfc With N-Back Practice Results In Neuroplastic Effects Confined To The Neurofeedback Target Region, Matthew Sherwood, Michael Patrick Weisend Ph.D., Jessica Kane, Jason G. Parker

Matthew Sherwood

In traditional fMRI, individuals respond to exogenous stimuli and are naïve to the effects of the stimuli on their neural activity patterns. Changes arising in the fMRI signal are analyzed post-hoc to elucidate the spatial and temporal activation of brain regions associated with the tasks performed. The advent of real-time fMRI has enabled a new method to systematically alter brain activity across space and time using neurofeedback training (NFT), providing a new tool to study internally-driven processes such as neuroplasticity. In this work, we combined n-back practice with fMRI-NFT of the left dorsolateral prefrontal cortex (DLPFC) to better understand ...


Pilot Study To Assess Breathing During Sight-Read Stringed Instrument Performance, Collin T. Erickson, Clark Potter MM, MFA, Gregory Bashford Ph.D 2016 University of Nebraska-Lincoln

Pilot Study To Assess Breathing During Sight-Read Stringed Instrument Performance, Collin T. Erickson, Clark Potter Mm, Mfa, Gregory Bashford Ph.D

UCARE Research Products

For many musicians, one common occurrence during a performance is the presence of stage fright. Stage fright, though not always expressed can influence the confidence and self-esteem of a performer, and thus can affect the quality of the performance. Every day musicians are affected by stage fright, and there has been no exact solution as to how to lessen the feeling of anxiety musicians feel before performing. No data has been collected to find the correlation between the regularity of breathing and the level of stage fright that a person feels during their performance. A way to quantify regularity of ...


Determining The Effect Of Delivery Rate On Glucose Uptake By Cancer Cells, Luke Felton 2016 University of Arkansas, Fayetteville

Determining The Effect Of Delivery Rate On Glucose Uptake By Cancer Cells, Luke Felton

Biomedical Engineering Undergraduate Honors Theses

Radiation therapy is one of the most commonly performed cancer treatment therapies today. Radiation therapy can cause can changes to tumor vasculature and affect blood flow rates. It is important to determine how changes in blood flow rates affect tumor glycolytic uptake to better understand tumor response to radiation therapy (1). The goal of this study was to use a fluorescent analog of glucose, 2-NBDG, to study the effect of varying flow rates on glucose uptake. A microfluidic device was constructed to flow 2-NBDG through. A murine metastatic breast cancer cell line was then cultured inside this microfluidic channel, and ...


Design Of A 3d-Printed Device For Diffuse Reflectance Spectroscopy Calibration As A Step Towards Clinical Translation, Nontapoth Vongkittiargorn 2016 University of Arkansas, Fayetteville

Design Of A 3d-Printed Device For Diffuse Reflectance Spectroscopy Calibration As A Step Towards Clinical Translation, Nontapoth Vongkittiargorn

Biomedical Engineering Undergraduate Honors Theses

The diffusive reflectance and spectroscopic microendoscopy (DRSME) is a multimodal imaging system that harnesses its usefulness from different light sources. One of the modalities, diffuse reflectance spectroscopy (DRS), has been used in our lab to investigate optical properties of epithelial tissues using a broadband white light as the main source. Calibration of DRS is required as it can obtain the maximum intensity and convert it to absolute reflectance. Current manual-adjusted calibration can be lengthy and often lead to inconsistent results. Therefore, a new method of calibration is introduced where additive manufacturing (or 3D printing) technology is fully utilized.

The instrumentation ...


Optimized Protocol For Measuring 2-Nbdg Uptake As A Cellular Marker Of Glycolytic Demand, Drew Folgmann 2016 University of Arkansas, Fayetteville

Optimized Protocol For Measuring 2-Nbdg Uptake As A Cellular Marker Of Glycolytic Demand, Drew Folgmann

Biomedical Engineering Undergraduate Honors Theses

2[N-(7-nitrobenz-2-oxa-1,2-diaxol-4-yl)amino]-2-deoxyglucose (2-NBDG) a fluorescently tagged analog of FDG is ideal for in vitro studies and imaging. 2-NBDG has been proven to be an adequate marker for glucose uptake in many different types of cells [1]. However, across the spectrum of 2-NBDG use a lack of consensus is observed for the following questions. What is the ideal time to fast cells to optimize cellular uptake of 2-NBDG? Also, what is the ideal concentration of 2-NBDG to be used when quantifying glucose uptake? Finally, what is the effect of serum on the uptake of 2-NBDG? To answer ...


Intravital Microscopy Of Tumor Oxygenation And Glycolytic Demand, Jesse D. Ivers 2016 University of Arkansas, Fayetteville

Intravital Microscopy Of Tumor Oxygenation And Glycolytic Demand, Jesse D. Ivers

Biomedical Engineering Undergraduate Honors Theses

There is growing concern about the over treatment of cancer because treatments are based primarily on tumor anatomy. In this study, we aim to begin the process of addressing that issue by developing an intravital technique for optically analyzing tumor biology. Two traits were identified as having significant importance in the aggression of a tumor, vascular oxygenation (SO2) and glycolytic demand. Dorsal skin flap window chambers were implanted and 4T1 and 67NR cancer cells were injected to provide a tumor model for the development of this intravital quantification technique. This study provides a detailed protocol from instrumentation setup to surgical ...


Atomic Force Microscopy Based Dna Analysis, Drew Creighton 2016 University of Arkansas, Fayetteville

Atomic Force Microscopy Based Dna Analysis, Drew Creighton

Mechanical Engineering Undergraduate Honors Theses

This report explores dry and wet scanning of a surface and DNA pickup using an AFM, as well as fluorescent staining of DNA. Dry and wet scans of DNA were obtained using a cantilever AFM tip in tapping mode. Dry scans were found to be clearer than wet scans; however, the drying process was found to decrease the thickness of DNA 2–4 times less than its original thickness. Alternately, wet scans were found to be less clear than dry scans and introduced more noise into the images obtained. Additionally, DNA kept its initial thickness during wet scanning. DNA was ...


Lesion Identification And The Effect Of Lesion On Motor Mapping After Stroke, Ruixi Zhou 2016 Washington University in St. Louis

Lesion Identification And The Effect Of Lesion On Motor Mapping After Stroke, Ruixi Zhou

Engineering and Applied Science Theses & Dissertations

Stroke is the most common cause of long-term severe disability and the motor system that is most commonly affected in stroke. One of the mechanisms that underlies recovery of motor deficits is reorganization or remapping of functional representations around the motor cortex. This mechanism has been shown in monkeys, but results in human subjects have been variable. In this thesis, I used a database that includes longitudinal behavioral and multimodal imaging data in both stroke patients and healthy controls for two research projects. Firstly, I improved an automatic lesion segmentation method to aid in the identification of the location and ...


Circle Of Willis Model For Transcranial Doppler Ultrasound Training, Conner J. Beyersdorf, Ben Hage, Greg Bashford 2016 University of Nebraska-Lincoln

Circle Of Willis Model For Transcranial Doppler Ultrasound Training, Conner J. Beyersdorf, Ben Hage, Greg Bashford

UCARE Research Products

Transcranial Doppler (TCD) ultrasound is a technique involving the use of high frequency transmitters to measure intracranial blood flow. The brain is supplied by blood in an arterial anastomosis called the Circle of Willis. Using TCD ultrasound on the circle is difficult and requires practice and teaching. A functional model of the Circle of Willis could prove to be a valuable teaching tool. Through the use of AutoCAD and 3D printing software, an anatomically accurate model was created and set in gelatin phantom inside of a plastic skull. Milk was pumped through the model with a peristaltic pump to simulate ...


Cerebrovascular Reactivity Change With Increased Intracranial Pressure, Madison Burger, M. Alwatban, Allison Porter, Ben Hage, Greg Bashford 2016 University of Nebraska-Lincoln

Cerebrovascular Reactivity Change With Increased Intracranial Pressure, Madison Burger, M. Alwatban, Allison Porter, Ben Hage, Greg Bashford

UCARE Research Products

Cerebrovascular reactivity (CVR) is an important regulatory factor of the brain. The parameter controls the dilation and constriction of blood vessels in the brain in response to certain stimuli, such as carbon dioxide. Abnormal CVR values could potentially be indicators of poorly functioning regulatory systems. Testing of CVR is one method of assessing the brain's regulatory capabilities. The purpose of this study was to test for a relationship between CVR and intracranial pressure (ICP).

In this study, increased intracranial pressure was created in 4 female subjects through head down tilt, using an inversion table. Subjects were lowered in the ...


Analysis Of Breath-Holding Index As An Assessment Of Cerebrovascular Reactivity, Allison P. Porter, Madison Burger, Mohammed Alwatban, Benjamin Hage, Greg Bashford 2016 University of Nebraska - Lincoln

Analysis Of Breath-Holding Index As An Assessment Of Cerebrovascular Reactivity, Allison P. Porter, Madison Burger, Mohammed Alwatban, Benjamin Hage, Greg Bashford

UCARE Research Products

Cerebrovascular reactivity (CVR) is a key factor in regulating blood flow into the brain, and a marker for vascular disease. If the brain's regulatory system is not working, a patient may be in serious trouble. Testing of CVR is one method of assessing the brain's regulatory capabilities. Transcranial Doppler ultrasound (TCD) is one tool to measure CVR. In this method, carbon dioxide in the blood is transiently increased (such as with the holding of breath), and the resulting blood flow in the brain is measured. In this study, we are going to measure the variability of the breathholding ...


Biventricular Finite Element Modeling And Quantification Of 3d Langragian Strains And Torsion Using Dense Mri, Zhanqiu Liu 2016 University of Kentucky

Biventricular Finite Element Modeling And Quantification Of 3d Langragian Strains And Torsion Using Dense Mri, Zhanqiu Liu

Theses and Dissertations--Mechanical Engineering

Statistical data suggests that increased use of evidence-based medical therapies has largely contributed to the decrease in American death rate caused by heart disease. And my studies are about two applications of magnetic resonance imaging (MRI) as a non-invasive approach in evidence-based health care research. In my first study, the achievement of a pulmonary valve replacement surgery was assessed on a patient with tetralogy of Fallot (TOF). In order to evaluate the remodeling of right ventricle, two biventricular finite element models were built up for pre-surgical images and post-surgical images. In my second study, 3D Lagrangian strains and torsion in ...


A Software Application For Cardiac-Gated Computerized Tomography Scanning, Stephen Caldwell, Trevor Engelsman 2016 University of Akron

A Software Application For Cardiac-Gated Computerized Tomography Scanning, Stephen Caldwell, Trevor Engelsman

Honors Research Projects

Computerized tomography (CT) scans are a common clinical imaging procedure used worldwide. Operating in the X-Ray spectrum, these machines rotate scanners around a stationary body in order to compile two-dimensional images into a unified three-dimensional image. With adjustment to scan frequency and intensity, internal features such as muscles, organs, and tendons can easily be viewed. However, the heart has long evaded CT use due to its near-constant motion. Recently, cardiac-gated scans have entered the market as a technique to image the heart at a specific moment in time when it is nearly still - the quiescent period. Occurring during rapid depolarization ...


Enhanced Control Of Dorsolateral Prefrontal Cortex Neurophysiology With Real-Time Functional Magnetic Resonance Imaging (Rt-Fmri) Neurofeedback Training And Working Memory Practice, Matthew S. Sherwood, Jessica Kane, Michael Patrick Weisend Ph.D., Jason G. Parker 2015 Wright State University - Main Campus

Enhanced Control Of Dorsolateral Prefrontal Cortex Neurophysiology With Real-Time Functional Magnetic Resonance Imaging (Rt-Fmri) Neurofeedback Training And Working Memory Practice, Matthew S. Sherwood, Jessica Kane, Michael Patrick Weisend Ph.D., Jason G. Parker

Matthew Sherwood

No abstract provided.


Spectral And Temporal Interrogation Of Cerebral Hemodynamics Via High Speed Laser Speckle Contrast Imaging, Rex Chin-Hao Chen 2015 University of Wisconsin-Milwaukee

Spectral And Temporal Interrogation Of Cerebral Hemodynamics Via High Speed Laser Speckle Contrast Imaging, Rex Chin-Hao Chen

Theses and Dissertations

Laser Speckle Contrast Imaging (LSCI) is a non-scanning wide field-of-view optical imaging technique specifically developed for cerebral blood flow (CBF) monitoring. In this project, a versatile Laser speckle contrast imaging system has been designed and developed to monitor CBF changes and examine the physical properties of cerebral vasculature during functional brain activation experiments.

The hardware of the system consists of a high speed CMOS camera, a coherent light source, a trinocular microscope, and a PC that does camera controlling and data storage. The simplicity of the system’s hardware makes it suitable for biological experiments.

In controlled flow experiments using ...


Feasibility Of Using Raman-Based Techniques For Breast Cancer Detection, Sara Mollamohammada 2015 University of Nebraska-Lincoln

Feasibility Of Using Raman-Based Techniques For Breast Cancer Detection, Sara Mollamohammada

Civil Engineering Theses, Dissertations, and Student Research

Breast cancer is one of the common types of cancer among women all over the world. Early diagnosis is an effective way that improve the treatment process and gives the patients a better chance of survival. Many of the patients infected by breast cancer choose breast conservation surgery (BCS). However, some of those will be subjected to mastectomy, and many will have tumor recurrence as there is no precise technique to show the tumor margins. Raman-based methods are powerful techniques with potential to rapidly differentiate normal from tumor tissues and provides a solution to detect tumor margin. This is because ...


Cobalt Ferrite Nanoparticles Fabricated Via Co-Precipitation In Air: Overview Of Size Control And Magnetic Properties, Dennis Toledo 2015 Florida International University

Cobalt Ferrite Nanoparticles Fabricated Via Co-Precipitation In Air: Overview Of Size Control And Magnetic Properties, Dennis Toledo

FIU Electronic Theses and Dissertations

Cobalt Ferrite has important, size-dependent magnetic properties. Consequently, an overview of particle size is important. Co-precipitation in air was the fabrication method used because it is comparatively simple and safe. The effects of three different reaction times including 1, 2, 3 hour(s) on particle size were compared. Also, the effectiveness of three different capping agents (Oleic Acid, Polyvinylpyrollidone (PVP), and Trisodium Citrate) in reducing aggregation and correspondingly particle size were examined. Using Welch’s analysis of variance (ANOVA) and the relevant post hoc tests, there was no significant difference (p=0.05) between reaction times of 1 hour and ...


Label-Free Surface-Enhanced Raman Spectroscopy-Linked Immunosensor Assay (Slisa) For Environmental Surveillance, vinay bhardwaj 2015 Florida International University

Label-Free Surface-Enhanced Raman Spectroscopy-Linked Immunosensor Assay (Slisa) For Environmental Surveillance, Vinay Bhardwaj

FIU Electronic Theses and Dissertations

The contamination of the environment, accidental or intentional, in particular with chemical toxins such as industrial chemicals and chemical warfare agents has increased public fear. There is a critical requirement for the continuous detection of toxins present at very low levels in the environment. Indeed, some ultra-sensitive analytical techniques already exist, for example chromatography and mass spectroscopy, which are approved by the US Environmental Protection Agency for the detection of toxins. However, these techniques are limited to the detection of known toxins. Cellular expression of genomic and proteomic biomarkers in response to toxins allows monitoring of known as well as ...


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