Pulmonology -Optical Coherence Tomography News

Articles in category: Pulmonology

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1. Johns Hopkins University Receives NIH Grant for Micro Coherence Imaging Technology for Assessing Obstructive Lung Disease In Vivo
  
  Explore Optical Coherence Tomography News Jun 27 2017 Pulmonology
  
  Johns Hopkins University Receives a 2017 NIH Grant for $750,287 for Micro Coherence Imaging Technology for Assessing Obstructive Lung Disease In Vivo. The principal investigator is Robert Brown. The program began in 2014 and ends in 2019. Below is a summary of the proposed work. This Biomedical Research Partnership (BRP) proposal involves a partnership among a biomedical engineering team, a pulmonary physiology team, and a clinical pulmonary medicine team. This research program will incorporate state of the art optical engineering, advanced in vivo physiologic evaluation, and direct application to human obstructive lung diseases (OLD). Optical coherence tomography (OCT) is ...
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  Mentions: Johns Hopkins University National Institutes of Health
2. Yale University Receives NIH Grant for Quantitative Optical Imaging of Cilia-Driven Fluid Flow
  
  Explore Optical Coherence Tomography News Jun 20 2017 Pulmonology , Funding
  
  Yale University Receives a 2017 NIH Grant for $416,250 for Quantitative Optical Imaging of Cilia-Driven Fluid Flow. The principal investigator is Mustafa Khokha. The program began in 2013 and ends in 2018. Below is a summary of the proposed work. Respiratory diseases are major causes of pediatric morbidity and mortality. These diseases are incompletely understood, which is a barrier to improving clinical care. Therefore, new mechanisms of disease need to be discovered. Optical imaging (e.g. optical coherence tomography [OCT]) will enable these discoveries since traditional imaging (e.g. x-ray, CT, MRI) cannot visualize structures smaller than ~1 mm ...
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  Mentions: National Institutes of Health Yale University
3. Pulmonary arterial wall disease in COPD and interstitial lung diseases candidates for lung transplantation
  
  Explore Respiratory Research May 11 2017 Pulmonology
  
  Background Pulmonary hypertension (PH) associated with lung disease has the worst prognosis of all types of PH. Pulmonary arterial vasculopathy is an early event in the natural history of chronic obstructive pulmonary disease (COPD) and interstitial lung disease (ILD). The present study characterized the alterations in the structure and function of the pulmonary arterial (PA) wall of COPD and ILD candidates for lung transplantation (LTx). Methods A cohort of 73 patients, 63 pre-LTx (30 COPD, 33 ILD), and ten controls underwent simultaneous right heart catheterisation and intravascular ultrasound (IVUS). Total pulmonary resistance (TPR), capacitance (Cp), and the TPR-Cp relationship were ...
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4. Airway compliance measured by anatomic optical coherence tomography
  
  Explore OSA | OSA Publishing Mar 24 2017 Pulmonology
  
  Quantification of airway compliance can aid in the diagnosis and treatment of obstructive airway disorders by detecting regions vulnerable to collapse. Here we evaluate the ability of a swept-source anatomic optical coherence tomography (SSaOCT) system to quantify airway cross-sectional compliance (CC) by measuring changes in the luminal cross-sectional area (CSA) under physiologically relevant pressures of 10–40 cmH 2 O. The accuracy and precision of CC measurements are determined using simulations of non-uniform rotation distortion (NURD) endemic to endoscopic scanning, and experiments performed in a simplified tube phantom and ex vivo porcine tracheas. NURD simulations show that CC measurements are ...
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  Mentions: Amy L. Oldenburg University of North Carolina Physical Sciences Incorporated
5. Optical Coherence Tomography (OCT) for Time-Resolved Imaging of Alveolar Dynamics in Mechanically Ventilated Rats
  
  Explore MDPI Open Access Journals Platform Mar 15 2017 Pulmonology
  
  Though artificial ventilation is an essential life-saving treatment, the mechanical behavior of lung tissue at the alveolar level is still unknown. Therefore, we need to understand the tissue response during artificial ventilation at this microscale in order to develop new and more protective ventilation methods. Optical coherence tomography (OCT) combined with intravital microscopy (IVM) is a promising tool for visualizing lung tissue dynamics with a high spatial and temporal resolution in uninterruptedly ventilated rats. We present a measurement setup using a custom-made animal ventilator and a gating technique for data acquisition of time-resolved sequences.
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  Mentions: Dresden University of Technology Edmund Koch Maria Gaertner
6. Optical coherence tomography and confocal laser endomicroscopy in pulmonary diseases
  
  Explore LWW Online Feb 22 2017 Pulmonology
  
  Purpose of review: Current imaging techniques (X-ray, computed tomography scan, ultrasound) have limitations in the identification and quantification of pulmonary diseases, in particular, on highly detailed level. The purpose of this review is to provide an overview of the current knowledge of innovative light- and laser-based imaging techniques that might fill this gap. Recent findings: Optical coherence tomography (OCT) and confocal laser endomicroscopy (CLE) are high-resolution imaging techniques, which, combined with bronchoscopy, provide 'near histology' detailed imaging of the airway wall, lung parenchyma, mediastinal lymph nodes, and pulmonary vasculature. This article reviews the technical background of OCT and CLE, summarizes ...
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  Mentions: Academic Medical Center at the University of Amsterdam
7. Multi-modal anatomical optical coherence tomography and CT for in vivo dynamic upper airway imaging
  
  Explore Conference Proceedings Feb 16 2017 Pulmonology
  
  We describe a novel, multi-modal imaging protocol for validating quantitative dynamic airway imaging performed using anatomical Optical Coherence Tomography (aOCT). The aOCT system consists of a catheter-based aOCT probe that is deployed via a bronchoscope, while a programmable ventilator is used to control airway pressure. This setup is employed on the bed of a Siemens Biograph CT system capable of performing respiratory-gated acquisitions. In this arrangement the position of the aOCT catheter may be visualized with CT to aid in co-registration. Utilizing this setup we investigate multiple respiratory pressure parameters with aOCT, and respiratory-gated CT, on both ex vivo porcine ...
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  Mentions: Siemens Amy L. Oldenburg University of North Carolina
8. LX Medical Corporation Receives NIH Grant for Biopsy Probes with Real-Time Multi-Modality Image Guidance for Peripheral Lung Nodules
  
  Explore Optical Coherence Tomography News Feb 14 2017 Pulmonology , Funding
  
  LX Medical Corporation Receives a 2017 NIH Grant for Biopsy Probes with Real-Time Multi-Modality Image Guidance for Peripheral Lung Nodules. The principal investigator is Andrei Vertikov. Below is a summary of the proposed work. Recent technological advances have enabled low-dose spiral CT to become an effective tool for lung cancer screening. The majority of pulmonary nodules detected on CT, however, are small and difficult to diagnose. While CT-guided transthoracic needle biopsy (CT-TTNB) has high diagnostic accuracy (70% to 90% depending on nodule size), the risk of complications such as pneumothorax and bleeding is high. Diagnostic confirmation by transbronchial lung biopsy ...
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  Mentions: National Institutes of Health
9. Flexible, high-resolution micro-optical coherence tomography endobronchial probe toward in vivo imaging of cilia
  
  Explore OSA | OSA Publishing Feb 10 2017 Pulmonology , Probes
  
  We report the design and fabrication of a flexible, longitudinally scanning high-resolution micro-optical coherence tomography (μOCT) endobronchial probe, optimized for micro-anatomical imaging in airways. The 2.4 mm diameter and flexibility of the probe allows it to be inserted into the instrument channel of a standard bronchoscope, enabling real-time video guidance of probe placement. To generate a depth-of-focus enhancing annular beam, we utilized a new fabrication method, whereby a hollow glass ferrule was angle-polished and gold-coated to produce an elongated annular reflector. We present validation data that verifies the preservation of linear scanning, despite the use of flexible materials. When ...
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  Mentions: Guillermo J. Tearney Massachusetts General Hospital University of Alabama
10. University of Alabama Receives NIH Grant for The Mechanisms Underlying Abnormal Mucus and Its Clearance in The Cystic Fibrosis Rat.
  
  Explore Optical Coherence Tomography News Feb 7 2017 Pulmonology , Funding
  
  University of Alabama at Birmingham Receives a 2017 NIH Grant for $117,056 for The Mechanisms Underlying Abnormal Mucus and Its Clearance in The Cystic Fibrosis Rat. The principal investigator is Susan Birket. The program began in 2017 and ends in 2022. Below is a summary of the propose work. Abnormal mucociliary clearance (MCC) is a critical component of cystic fibrosis (CF) lung disease, especially in the presence of infection; however, the mechanisms responsible for the defect are not well understood. Until recently, evaluation of this question has been primarily limited to cell culture models which do not replicate the ...
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  Mentions: National Institutes of Health University of Alabama
11. Anatomically correct visualization of the human upper airway using a high-speed long range optical coherence tomography system with an integrated positioning sensor
  
  Explore Nature Publishing Group Dec 20 2016 Pulmonology
  
  The upper airway is a complex tissue structure that is prone to collapse. Current methods for studying airway obstruction are inadequate in safety, cost, or availability, such as CT or MRI, or only provide localized qualitative information such as flexible endoscopy. Long range optical coherence tomography (OCT) has been used to visualize the human airway in vivo , however the limited imaging range has prevented full delineation of the various shapes and sizes of the lumen. We present a new long range OCT system that integrates high speed imaging with a real-time position tracker to allow for the acquisition of an ...
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  Mentions: Zhongping Chen UC Irvine Brian J. F. Wong
12. Birefringence microscopy platform for assessing airway smooth muscle structure and function in vivo
  
  Explore Science Translational Medicine Oct 13 2016 Pulmonology
  
  The inability to visualize airway smooth muscle (ASM) cells in vivo is a major obstacle in understanding their role in normal physiology and diseases. At present, there is no imaging modality available to assess ASM in vivo. Confocal endomicroscopy lacks the penetration depth and field of view, and conventional optical coherence tomography (OCT) does not have sufficient contrast to differentiate ASM from surrounding tissues. We have developed a birefringence microscopy platform that leverages the micro-organization of tissue to add further dimension to traditional OCT. We have used this technology to validate ASM measurements in ex vivo swine and canine studies ...
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  Mentions: Brett E. Bouma Massachusetts General Hospital Harvard University
13. Mass. General studies identify differences underlying the airway responses of patients with asthma
  
  Explore Massachusetts General Hospital Home Oct 5 2016 Pulmonology
  
  Novel imaging and other tools reveal thicker airway smooth muscle, stronger immune response to allergens in asthmatic individuals More than 300 million people worldwide are affected by asthma, 25 million in the U.S. alone, and for most of them, allergy is an underlying cause. But why do some individuals allergic to airborne allergens develop asthma while many do not? Now two research teams from Massachusetts General Hospital (MGH) have used innovative imaging technology and other novel approaches to identify some key differences in both the immune response and the sensitivity of airway cells to inflammation between allergic individuals with ...
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  Mentions: National Institutes of Health Massachusetts General Hospital Harvard University
14. In vivo bronchoscopic optical coherence tomography for low risk microscopic diagnosis of idiopathic pulmonary fibrosis
  
  Explore qjmed.oxfordjournals.org Sep 27 2016 Pulmonology
  
  No abstract provided
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  Mentions: Massachusetts General Hospital Harvard University Melissa J. Suter
15. Measuring Airway Remodeling in Patients with Different COPD Staging Using Endobronchial Optical Coherence Tomography
  
  Explore ScienceDirect Aug 16 2016 Pulmonology
  
  Background Although forced expiratory volume in one second (FEV 1 ) remains the gold standard for staging COPD, the association between airway remodeling and airflow limitation remains unclear. Objective Endobronchial optical coherence tomography (EB-OCT) was performed to assess the association between disorders of large- and medium-to-small-sized airways and COPD staging. We also evaluated small-airway architecture in heavy-smokers with normal FEV 1 (S NL ) and healthy never-smokers. Methods We recruited 48 COPD patients (stage Ⅰ, n=14; stage Ⅱ, n=15; stage Ⅲ-Ⅳ, n=19), 21 S NL , and 17 healthy never-smokers. Smoking history inquiry, spirometry, chest computed tomography, bronchoscopy and EB-OCT ...
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  Mentions: Wei Wang
16. University of North Carolina Receives NIH Grant for Imaging Nanophysical Properties of Actively Transporting Bronchial Mucus
  
  Explore Optical Coherence Tomography News Aug 9 2016 Pulmonology , Funding
  
  University of North Carolina at Chapel Hill Receives a 2016 NIH Grant for $234,624 for Imaging Nanophysical Properties of Actively Transporting Bronchial Mucus. The principal investigator is Amy Oldenburg. The program began in 2016 and ends in 2018. Below is a summary of the proposed work. Mucus coats the lung epithelium and traps thousands of pathogens that we inhale every day. Human bronchial epithelial (hBE) cells lining the lung have cilia that propel mucus via shear forces, a mechanism known as muco-ciliary transport (MCT). MCT acts to clear mucus, providing a primary defense against trapped pathogens. In respiratory diseases ...
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  Mentions: National Institutes of Health Amy L. Oldenburg University of North Carolina
17. Drs. Campbell, Hariri, and Lehman Receive 2016 LUNGevity Career Development Awards
  
  Explore cbs8.com Jul 18 2016 Oncology , Pulmonology , Funding
  
  Lida Hariri , MD, Massachusetts General Hospital, who will use a novel high-resolution imaging technique called Optical Coherence Tomography to perform virtual optical biopsies to determine its value in complementing tissue biopsies in the determination of early-stage lung cancer
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  Mentions: Vanderbilt University Massachusetts General Hospital Harvard University
18. New aspect for systemic effects of copd: Eye findings
  
  Explore Wiley Online Library Jul 13 2016 Ophthalmology , Pulmonology
  
  Introduction : Chronic Obstructive Pulmonary Disease (COPD) has multisystemic implications and comorbidities. Hypoxia and systemic inflammation are thought to involve oculary structures. In this study, our aim is to evaluate retinal nerve fiber and choroidal thickness and retinal vessel diameter using the Spectral-domain optical coherence tomography (SD-OCT) in COPD subjects. Methods : 43 subjects diagnosed with COPD according to the Chronic Obstructive Lung Disease criteria at the Pulmonology Department of Pamukkale University were enrolled in the study. All subjects underwent respiratory function testing and a carbon monoxide diffusion test. To determine hypoxic state, arterial blood gas analysis was performed. The control group ...
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19. Yale University Receives NIH Grant for Quantitative Optical Imaging of Cilia-Driven Fluid Flow
  
  Explore Optical Coherence Tomography News Jun 7 2016 Pulmonology , Funding
  
  Yale University Receives a 2016 NIH Grant for $416,250 for Quantitative Optical Imaging of Cilia-Driven Fluid Flow. The principal investigator is Michael Choma. The program began in 2013 and ends in 2018. Below is a summary of the proposed work. Respiratory diseases are major causes of pediatric morbidity and mortality. These diseases are incompletely understood, which is a barrier to improving clinical care. Therefore, new mechanisms of disease need to be discovered. Optical imaging (e.g. optical coherence tomography [OCT]) will enable these discoveries since traditional imaging (e.g. x-ray, CT, MRI) cannot visualize structures smaller than ~1 mm ...
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  Mentions: National Institutes of Health Yale University Michael A. Choma
20. Johns Hopkins University Receives NIH Grant for Micro Coherence Imaging Technology for Assessing Obstructive Lung Disease In Vivo
  
  Explore Optical Coherence Tomography News Jun 7 2016 Pulmonology , Funding
  
  Johns Hopkins University Receives a 2016 NIH Grant for $746,856 for Micro Coherence Imaging Technology for Assessing Obstructive Lung Disease In Vivo. The principal investigator is Robert Brown. The program began in 2014 and ends in 2019. Below is a summary of the proposed work. This Biomedical Research Partnership (BRP) proposal involves a partnership among a biomedical engineering team, a pulmonary physiology team, and a clinical pulmonary medicine team. This research program will incorporate state of the art optical engineering, advanced in vivo physiologic evaluation, and direct application to human obstructive lung diseases (OLD). Optical coherence tomography (OCT) is ...
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  Mentions: Johns Hopkins University National Institutes of Health
21. In vivo imaging of airway cilia and mucus clearance with micro-optical coherence tomography
  
  Explore OSA | OSA Publishing Jun 2 2016 Pulmonology
  
  We have designed and fabricated a 4 mm diameter rigid endoscopic probe to obtain high resolution micro-optical coherence tomography (µOCT) images from the tracheal epithelium of living swine. Our common-path fiber-optic probe used gradient-index focusing optics, a selectively coated prism reflector to implement a circular-obscuration apodization for depth-of-focus enhancement, and a common-path reference arm and an ultra-broadbrand supercontinuum laser to achieve high axial resolution. Benchtop characterization demonstrated lateral and axial resolutions of 3.4 μm and 1.7 μm, respectively (in tissue). Mechanical standoff rails flanking the imaging window allowed the epithelial surface to be maintained in focus without disrupting ...
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  Mentions: Guillermo J. Tearney Massachusetts General Hospital University of Alabama
22. Bronchoscopic Optical Coherence Tomography As A Low Risk Method For Microscopic Diagnosis Of Idiopathic Pulmonary Fibrosis
  
  Explore Home (thoracic) May 9 2016 Pulmonology
  
  Idiopathic pulmonary fibrosis (IPF) is a progress, fatal form of insterstitial lung disease (IDL)....
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  Mentions: Massachusetts General Hospital Harvard University Melissa J. Suter
23. Validation of Human Small Airway Measurements Using Endobronchial Optical Coherence Tomography
  
  Explore CHEST Journal Apr 21 2016 Pulmonology
  
  PURPOSE: To evaluate the usefulness of endobronchial optical coherence tomography (EB-OCT) in assessing small airways morphology in vivo. METHODS: Twelve patients with pulmonary nodules scheduled for lung resection underwent spirometry, multidetector computed tomography (MDCT) and EB-OCT. We measured Dmean (mean luminal diameter), Ai (inner luminal area), Aw (airway wall area) and Aw% [Aw/(Ai+Aw) ×100%] from the 3rd to 5th generation bronchi of RB9 segment by MDCT. Dmean, Ai, Aw and Aw% from the 3rd to 9th generation bronchi of RB9 segment were measured by EB-OCT and histology. The correlations of these 4 parameters, measured by the three methods ...
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  Mentions: University of Maryland
24. Optical Coherence Tomography of Pulmonary Arterial Walls in Humans and Pigs (Sus scrofa domesticus)
  
  Explore ingentaconnect.com Mar 29 2016 Pulmonology
  
  Pulmonary arterial hypertension (PAH) is a devastating disorder characterized by progressive elevation of the pulmonary pressures that, in the absence of therapy, results in chronic right-heart failure and premature death. The vascular pathology of PAH is characterized by progressive loss of small (diameter, less than 50 μm) peripheral pulmonary arteries along with abnormal medial thickening, neointimal formation, and intraluminal narrowing of the remaining pulmonary arteries. Vascular pathology correlates with disease severity, given that hemodynamic effects and disease outcomes are worse in patients with advanced compared with lower-grade lesions. Novel imaging tools are urgently needed that demonstrate the extent of vascular ...
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