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https://www.readbyqxmd.com/read/28819458/focused-ultrasound-hyperthermia-mediated-drug-delivery-using-thermosensitive-liposomes-and-visualized-with-in-vivo-two-photon-microscopy
#1
Marc A Santos, David E Goertz, Kullervo Hynynen
The future of nanomedicines in oncology requires leveraging more than just the passive drug accumulation in tumors through the enhanced permeability and retention effect. Promising results combining mild hyperthermia (HT) with lyso-thermosensitive liposomal doxorubicin (LTSL-DOX) has led to improved drug delivery and potent antitumor effects in pre-clinical studies. The ultimate patient benefit from these treatments can only be realized when robust methods of HT can be achieved clinically. One of the most promising methods of non-invasive HT is the use of focused ultrasound (FUS) with MRI thermometry for anatomical targeting and feedback...
2017: Theranostics
https://www.readbyqxmd.com/read/28819309/visualization-and-detection-of-ciliary-beating-pattern-and-frequency-in-the-upper-airway-using-phase-resolved-doppler-optical-coherence-tomography
#2
Joseph C Jing, Jason J Chen, Lidek Chou, Brian J F Wong, Zhongping Chen
Ciliary motion plays a critical role in the overall respiratory health of the upper airway. These cilia beat at a native frequency and in a synchronized pattern to continuously transport foreign particulate trapped in a layer of mucous out of the upper airway. Disruption of ciliary motion can lead to severe respiratory diseases and compromised respiratory function. Currently, the study of cilia requires expensive high speed cameras and high powered microscopes which is unsuitable for in vivo imaging and diagnosis...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28816914/congenital-hypotonia-in-toddlerhood
#3
Naomi Steiner, Alcy Torres, Arathi Reddy, Marilyn Augustyn
David is a 22-month-old boy who is new to your practice. He recently moved from a rural area in the Midwest. His father is in the United States Air Force, and his mother works as a full-time homemaker. Their household includes 5 older siblings. The family moves every year because of the father's Air Force placement.David was born full-term in Virginia, with no reported pregnancy complications and no alcohol, tobacco, or drug exposure. He was delivered vaginally, with Apgar scores of 7 and 9, respectively and no respiratory issues...
August 9, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28816877/fractures-in-spinal-ankylosing-disorders-a-narrative-review-of-disease-and-injury-types-treatment-techniques-and-outcomes
#4
Tarush Rustagi, Doniel Drazin, Cumhur Oner, Jonathan York, Gregory D Schroeder, Alexander R Vaccaro, Rod J Oskouian, Jens R Chapman
INTRODUCTION: Spinal ankylosing disorders encompass ankylosing spondylitis (AS), disseminated hyperostosis of the spine, and end-stage spondylosis. All these result in a stiffened and frequently deformed spinal column. This makes the spinal column highly susceptible to severe injuries that are commonly associated with unfavorable outcomes. Improved understanding of the underlying disease processes and clinical comorbidities may alter the poor injury related morbidity and mortality outcomes...
September 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28814965/convolutional-neural-network-for-the-detection-of-end-diastole-and-end-systole-frames-in-free-breathing-cardiac-magnetic-resonance-imaging
#5
Fan Yang, Yan He, Mubashir Hussain, Hong Xie, Pinggui Lei
Free-breathing cardiac magnetic resonance (CMR) imaging has short examination time with high reproducibility. Detection of the end-diastole and the end-systole frames of the free-breathing cardiac magnetic resonance, supplemented by visual identification, is time consuming and laborious. We propose a novel method for automatic identification of both the end-diastole and the end-systole frames, in the free-breathing CMR imaging. The proposed technique utilizes the convolutional neural network to locate the left ventricle and to obtain the end-diastole and the end-systole frames from the respiratory motion signal...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/28814848/pathophysiological-mechanism-of-long-term-noninvasive-ventilation-in-stable-hypercapnic-patients-with-copd-using-functional-respiratory-imaging
#6
Bita Hajian, Jan De Backer, Claire Sneyers, Francisca Ferreira, Katherine C Barboza, Glenn Leemans, Wim Vos, Wilfried De Backer
INTRODUCTION: Patients with severe COPD often develop chronic hypercapnic respiratory failure. Their prognosis worsens and they are more likely to develop exacerbations. This has major influence on the health-related quality of life. Currently, there is no information about the success of long-term noninvasive ventilation (NIV) among patients who receive NIV in acute settings. Also, little is known about the pathophysiological mechanism of NIV. METHODS: Ten Global Initiative for Obstructive Lung Disease stage III and IV COPD patients with respiratory failure who were hospitalized following acute exacerbation were treated with NIV using a Synchrony BiPAP device for 6 months...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28810314/-clinical-and-pathological-characteristics-of-erdheim-chester-disease-involving-the-lungs
#7
T Lu, S Wang, H Huang, T Wang, M Wang, D R Zhong, R E Feng
Objective: To explore the clinical manifestations, pathological features, differential diagnosis and gene mutation status in patients with pulmonary involvement of Erdheim-Chester disease (ECD). Methods: The clinical data of 4 cases of Erdheim-Chester disease admitted to Peking Union Medical College Hospital from October 2014 to August 2016 were examined for imaging, microscopic and immunohistochemitry findings, and BRAFV600E mutation. The related literatures were reviewed. Results: Among the 4 cases, there were 3 males and 1 female, aging from 7 to 47 years, and the average age was 34...
August 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28809677/application-of-the-4d-xcat-phantoms-in-biomedical-imaging-and-beyond
#8
W Paul Segars, B M W Tsui, Jing Cai, Fang-Fang Yin, George S K Fung, Ehsan Samei
The four dimensional (4D) eXtended CArdiac-Torso (XCAT) series of phantoms was developed to provide accurate computerized models of the human anatomy and physiology. The XCAT series encompasses a vast population of phantoms of varying ages from newborn to adult, each including parameterized models for the cardiac and respiratory motions. With great flexibility in the XCAT's design, any number of body sizes, different anatomies, cardiac or respiratory motions or patterns, patient positions and orientations, and spatial resolutions can be simulated...
August 10, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28802158/lipidation-increases-antiviral-activities-of-coronavirus-fusion-inhibiting-peptides
#9
Jung-Eun Park, Tom Gallagher
Coronaviruses (CoVs) can cause life-threatening respiratory diseases. Their infectious entry requires viral spike (S) proteins, which attach to cell receptors, undergo proteolytic cleavage, and then refold in a process that catalyzes virus-cell membrane fusion. Fusion-inhibiting peptides bind to S proteins, interfere with refolding, and prevent infection. Here we conjugated fusion-inhibiting peptides to various lipids, expecting this to secure peptides onto cell membranes and thereby increase antiviral potencies...
August 9, 2017: Virology
https://www.readbyqxmd.com/read/28800546/mr-based-respiratory-and-cardiac-motion-correction-for-pet-imaging
#10
Thomas Küstner, Martin Schwartz, Petros Martirosian, Sergios Gatidis, Ferdinand Seith, Christopher Gilliam, Thierry Blu, Hadi Fayad, Dimitris Visvikis, F Schick, B Yang, H Schmidt, N F Schwenzer
PURPOSE: To develop a motion correction for Positron-Emission-Tomography (PET) using simultaneously acquired magnetic-resonance (MR) images within 90 s. METHODS: A 90 s MR acquisition allows the generation of a cardiac and respiratory motion model of the body trunk. Thereafter, further diagnostic MR sequences can be recorded during the PET examination without any limitation. To provide full PET scan time coverage, a sensor fusion approach maps external motion signals (respiratory belt, ECG-derived respiration signal) to a complete surrogate signal on which the retrospective data binning is performed...
August 3, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28800439/a-simplified-parametrised-model-for-lung-microstructures-capable-of-mimicking-realistic-geometrical-and-mechanical-properties
#11
Christian J Roth, Lena Yoshihara, Wolfgang A Wall
The respiratory zone of mammalian lungs contains several millions of so-called alveoli. The geometrical and mechanical properties of this microstructure are crucial for respiration and influence the macroscopic behaviour of the entire organ in health and disease. Hence, if computational models are sought to gain more insight into lung behaviour, predict lung states in certain scenarios or suggest better treatment options in early stages of respiratory dysfunction, an adequate representation of this microstructure is essential...
August 1, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28798719/fulminant-acute-ascending-hemorrhagic-myelitis-treated-with-eculizumab
#12
Nang Boe Ohnmar Hsam, Klemens Angstwurm, Sebastian Peters, Kornelius Fuchs, Gerhard Schuierer, Ulrich Bogdahn, Robert Weissert
We describe an 18-year-old patient who developed back pain, rapidly ascending sensomotory deficits, bladder dysfunction, Lhermitte's sign, absent abdominal reflexes of all three levels, brisk tendon reflexes, and positive Babinski's sign. Magnetic resonance imaging of the spinal cord showed a long segment of cervical and thoracic intramedullary signal hyperintensity suggesting a longitudinally extensive transverse myelitis possibly within the course of a fast progressing ascending immune-mediated hemorrhagic myelopathy...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28798254/oxygen-dependent-changes-in-lung-development-do-not-affect-epithelial-infection-with-influenza-a-virus
#13
William Domm, Min Yee, Ravi S Misra, Robert Gelein, Aitor Nogales, Luis Martinez Sobrido, Michael A O'Reilly
Infants born prematurely often require supplemental oxygen that contributes to aberrant lung development and increased pulmonary morbidity following a respiratory viral infection. We have been using a mouse model to understand how early-life hyperoxia affects the adult lung response to influenza A virus (IAV) infection. Prior studies showed how neonatal hyperoxia (100% oxygen) increased sensitivity of adult mice to infection with influenza A virus (IAV (A/Hong Kong/X31) H3N2) as defined by persistent inflammation, pulmonary fibrosis, and mortality...
August 10, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28797700/4dct-imaging-to-assess-radiomics-feature-stability-an-investigation-for-thoracic-cancers
#14
Ruben T H M Larue, Lien Van De Voorde, Janna E van Timmeren, Ralph T H Leijenaar, Maaike Berbée, Meindert N Sosef, Wendy M J Schreurs, Wouter van Elmpt, Philippe Lambin
BACKGROUND AND PURPOSE: Quantitative tissue characteristics derived from medical images, also called radiomics, contain valuable prognostic information in several tumour-sites. The large number of features available increases the risk of overfitting. Typically test-retest CT-scans are used to reduce dimensionality and select robust features. However, these scans are not always available. We propose to use different phases of respiratory-correlated 4D CT-scans (4DCT) as alternative. MATERIALS AND METHODS: In test-retest CT-scans of 26 non-small cell lung cancer (NSCLC) patients and 4DCT-scans (8 breathing phases) of 20 NSCLC and 20 oesophageal cancer patients, 1045 radiomics features of the primary tumours were calculated...
August 7, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28796760/acute-flaccid-myelitis-among-children-washington-september-november-2016
#15
Jesse Bonwitt, Amy Poel, Chas DeBolt, Elysia Gonzales, Adriana Lopez, Janell Routh, Krista Rietberg, Natalie Linton, James Reggin, James Sejvar, Scott Lindquist, Catherine Otten
In October 2016, Seattle Children's Hospital notified the Washington State Department of Health (DOH) and CDC of a cluster of acute onset of limb weakness in children aged ≤14 years. All patients had distinctive spinal lesions largely restricted to gray matter detected by magnetic resonance imaging (MRI), consistent with acute flaccid myelitis (AFM). On November 3, DOH issued a health advisory to local health jurisdictions requesting that health care providers report similar cases. By January 24, 2017, DOH and CDC had confirmed 10 cases of AFM and excluded two suspected cases among residents of Washington during September-November 2016...
August 11, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28796188/a-compressed-sensing-based-method-for-reducing-the-sampling-time-of-a-high-resolution-pressure-sensor-array-system
#16
Chenglu Sun, Wei Li, Wei Chen
For extracting the pressure distribution image and respiratory waveform unobtrusively and comfortably, we proposed a smart mat which utilized a flexible pressure sensor array, printed electrodes and novel soft seven-layer structure to monitor those physiological information. However, in order to obtain high-resolution pressure distribution and more accurate respiratory waveform, it needs more time to acquire the pressure signal of all the pressure sensors embedded in the smart mat. In order to reduce the sampling time while keeping the same resolution and accuracy, a novel method based on compressed sensing (CS) theory was proposed...
August 10, 2017: Sensors
https://www.readbyqxmd.com/read/28795798/a-two-photon-and-deep-red-emission-ratiometric-fluorescent-probe-with-a-large-emission-shift-and-signal-ratios-for-sulfur-dioxide-ultrafast-response-and-applications-in-living-cells-brain-tissues-and-zebrafishes
#17
Yanyan Ma, Yonghe Tang, Yuping Zhao, Shiying Gao, Weiying Lin
Sulfur dioxide (SO2) is a dangerous environmental pollutant. Excessive intake of it may cause some respiratory diseases and even lung cancer. The development of effective methods for detecting of SO2 is of great importance for environment and physiology. Herein, we have designed and synthesized a novel two-photon (TP) and deep-red emission ratiometric fluo-rescent probe (CP) for detecting of SO2. Notably, the novel probe CP exhibited ultrafast response to SO2 in less than 5 sec-onds, and displayed a great emission shift (195 nm) and a large emission signal ratio variation (enhancement from 0...
August 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28793969/lung-ultrasound-in-internal-medicine-a-bedside-help-to-increase-accuracy-in-the-diagnosis-of-dyspnea
#18
Tiziano Perrone, Alessia Maggi, Carmelo Sgarlata, Ilaria Palumbo, Elisa Mossolani, Sara Ferrari, Ariel Melloul, Roberta Mussinelli, Michele Boldrini, Ambra Raimondi, Aderville Cabassi, Francesco Salinaro, Stefano Perlini
BACKGROUND: Dyspnea is one of the most frequent causes of admission in Internal Medicine wards, leading to a sizeable utilization of medical resources. STUDY DESIGN AND METHODS: The role of bedside lung ultrasound (LUS) was evaluated in 130 consecutive patients (age: 81±9years), in whom blindly collected LUS results were compared with data obtained by clinical examination, medical history, blood analysis, and chest X-ray. Dyspnea etiology was classified as "cardiac" (n=80), "respiratory" (n=36) or "mixed" (n=14), according to the discharge diagnosis (congestive heart failure either alone [n=80] or associated with pneumonia [n=14], pneumonia [n=24], and obstructive disventilatory syndrome [n=12])...
August 6, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28792468/real-time-external-respiratory-motion-measuring-technique-using-an-rgb-d-camera-and-principal-component-analysis
#19
Udaya Wijenayake, Soon-Yong Park
Accurate tracking and modeling of internal and external respiratory motion in the thoracic and abdominal regions of a human body is a highly discussed topic in external beam radiotherapy treatment. Errors in target/normal tissue delineation and dose calculation and the increment of the healthy tissues being exposed to high radiation doses are some of the unsolicited problems caused due to inaccurate tracking of the respiratory motion. Many related works have been introduced for respiratory motion modeling, but a majority of them highly depend on radiography/fluoroscopy imaging, wearable markers or surgical node implanting techniques...
August 9, 2017: Sensors
https://www.readbyqxmd.com/read/28791852/cardiac-tumors-in-children-a-20-year-review-of-clinical-presentation-diagnostics-and-treatment
#20
Joanna Kwiatkowska, Anna Wałdoch, Jarosław Meyer-Szary, Piotr Potaż, Marek Grzybiak
BACKGROUND: The use of new imaging techniques has contributed significantly to earlier diagnosis and treatment of cardiac tumors. OBJECTIVES: The aim of the study was to analyze data from children with cardiac tumors in terms of clinical presentation, the role of noninvasive diagnostic procedures and the long-term outcome. MATERIAL AND METHODS: The data analyzed retrospectively concerned 30 children in whom cardiac tumors were diagnosed from January 1995 to July 2015...
March 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
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