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Respiratory imaging

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https://www.readbyqxmd.com/read/29792199/nanoparticle-delivery-of-grape-seed-derived-proanthocyanidins-to-airway-epithelial-cells-dampens-oxidative-stress-and-inflammation
#1
S Castellani, A Trapani, A Spagnoletta, L di Toma, T Magrone, S Di Gioia, D Mandracchia, G Trapani, E Jirillo, M Conese
BACKGROUND: Chronic respiratory diseases, whose one of the hallmarks is oxidative stress, are still incurable and need novel therapeutic tools and pharmaceutical agents. The phenolic compounds contained in grape are endowed with well-recognized anti-oxidant, anti-inflammatory, anti-cancer, and anti-aging activities. Considering that natural anti-oxidants, such as proanthocyanidins, have poor water solubility and oral bioavailability, we have developed a drug delivery system based on solid lipid nanoparticles (SLN), apt to encapsulate grape seed extract (GSE), containing proanthocyanidins...
May 23, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29792179/hopkins-syndrome-following-the-first-episode-of-bronchial-asthma-associated-with-enterovirus-d68-a-case-report
#2
Fumie Hayashi, Shintaro Hayashi, Dai Matsuse, Ryo Yamasaki, Keiji Yonekura, Jun-Ichi Kira
BACKGROUND: Hopkins syndrome (HS) is a rare disorder presenting with acute flaccid paralysis of the limbs following an asthma attack. Neurologists encounter a diagnostic challenge if patients without a history of bronchial asthma develop neurologic features mimicking HS following acute respiratory distress. We report a case of HS occurring after a first episode of bronchial asthma associated with enterovirus D68 infection. CASE PRESENTATION: A 5-year-old girl developed acute respiratory distress...
May 23, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29791660/potential-role-of-sorafenib-as-neoadjuvant-therapy-in-unresectable-papillary-thyroid-cancer
#3
Debora L S Danilovic, Gilberto Castro, Felipe S R Roitberg, Felipe A B Vanderlei, Fernanda A Bonani, Ricardo M C Freitas, George B Coura-Filho, Rosalinda Y Camargo, Marco A Kulcsar, Suemi Marui, Ana O Hoff
Total thyroidectomy, radioiodine (RAI) therapy, and TSH suppression are the mainstay treatment for differentiated thyroid carcinomas (DTCs). Treatments for metastatic disease include surgery, external-beam radiotherapy, RAI, and kinase inhibitors for progressive iodine-refractory disease. Unresectable locoregional disease remains a challenge, as standard therapy with RAI becomes unfeasible. We report a case of a young patient who presented with unresectable papillary thyroid carcinoma (PTC), and treatment with sorafenib allowed total thyroidectomy and RAI therapy...
May 17, 2018: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29791262/flow-recirculation-in-cartilaginous-ring-cavities-of-human-trachea-model
#4
Jose Montoya Segnini, Humberto Bocanegra Evans, Luciano Castillo
BACKGROUND: Despite the prevailing assumption of "smooth trachea walls" in respiratory fluid dynamics research, recent investigations have demonstrated that cartilaginous rings in the trachea and main bronchi have a significant effect on the flow behavior and in particle deposition. However, there is not enough detailed information about the underlying physics of the interaction between the cartilage rings and the flow. MATERIALS AND METHODS: This study presents an experimental observation of a simplified Weibel-based model of the human trachea and bronchi with cartilaginous rings...
May 23, 2018: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/29790784/neonatal-pulmonary-mri-of-bronchopulmonary-dysplasia-predicts-short-term-clinical-outcomes
#5
Nara S Higano, David R Spielberg, Robert J Fleck, Andrew H Schapiro, Laura L Walkup, Andrew D Hahn, Jean A Tkach, Paul S Kingma, Stephanie L Merhar, Sean B Fain, Jason C Woods
RATIONALE: Bronchopulmonary dysplasia (BPD) is a serious neonatal pulmonary condition associated with premature birth, but the underlying parenchymal disease and trajectory are poorly characterized. The current NICHD/NHLBI definition of BPD severity is based on degree of prematurity and extent of oxygen requirement. However, no clear link exists between initial diagnosis and clinical outcomes. OBJECTIVES: We hypothesized that magnetic resonance imaging (MRI) of structural parenchymal abnormalities will correlate with NICHD-defined BPD disease severity and predict short-term respiratory outcomes...
May 23, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29789888/diffusion-tensor-imaging-in-acute-pyelonephritis-in-children
#6
Mickaël Lair, Mariette Renaux-Petel, Adnan Hassani, Yohann Cruypeninck, Ioana Vasies, Agnès Liard, Jean-Nicolas Dacher, Pierre-Hugues Vivier
BACKGROUND: Diffusion-weighted imaging plays a key role in the imaging of acute pyelonephritis by MRI. However the use of respiratory triggering is challenging and time-consuming in children. Diffusion tensor imaging without respiratory triggering might provide satisfying images of the moving kidneys. OBJECTIVE: To compare mean diffusivity diffusion tensor images obtained with free breathing with diffusion-weighted images obtained with respiratory triggering. MATERIALS AND METHODS: Thirty-one children with suspected acute pyelonephritis underwent axial diffusion tensor imaging acquisition with free breathing and axial and coronal diffusion-weighted imaging acquisitions with respiratory triggering...
May 22, 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29789217/outcomes-and-cost-of-open-versus-endovascular-repair-of-intact-thoracoabdominal-aortic-aneurysm
#7
Satinderjit Locham, Hanaa Dakour-Aridi, Besma Nejim, Jasninder Dhaliwal, Widian Alshwaily, Mahmoud Malas
OBJECTIVE: Many previous studies have evaluated the outcomes of open and endovascular repair of thoracoabdominal aortic aneurysms (TAAAs). However, little is known about the differences in cost of these procedures and the potential factors driving these differences. The aim of this study was to evaluate the outcomes and cost of open aortic repair (OAR) vs endovascular repair of intact TAAA. METHODS: All patients undergoing repair for intact TAAA were identified in the Premier Healthcare Database (July 2009-March 2015)...
May 19, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29787380/an-image-reconstruction-method-with-locally-adaptive-gating-scheme-for-pet-data
#8
Jizhe Wang, Yun Dong, Hongdi Li, Tao Feng
In conventional gating approaches for PET, a single number of gates is predetermined for the whole field of view (FOV) regardless of spatially variant motion blurring effects, which compromises image quality by under-gating regions of large motion and over-gating static regions. To achieve the best resolution-noise trade-off for the whole FOV, we proposed a new approach that incorporates spatially variant number of gates into gated image reconstruction. The first step is to estimate motion amplitude of each spatial location...
May 22, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29786925/computed-tomographic-and-radiographic-bronchial-collapse-may-be-a-normal-characteristic-of-forced-expiration-in-dogs
#9
Hyunryung Kim, Young Joo Kim, Hanbin Lee, Taegeon An, Jin Yu, Hyounglok Yoon, Gayeon An, Jaihyun Jung, Jinhwa Chang, Dongwoo Chang
Tracheobronchomalacia has been diagnosed using radiography or bronchoscopy to confirm bronchial changes in luminal diameter during the respiratory cycle. However, studies in healthy humans suggest that some degree of bronchial collapse may be observed during the normal respiratory cycle. In this analytical study, the luminal diameter of the bronchus to each of the six pulmonary lobes and the mean percentage of expiratory collapse from end inspiratory, end expiratory, and two forced expiratory phases (10 and 15 ml/kg) were determined via computed tomography (CT) and radiography in 22 healthy Beagle dogs...
May 22, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29784460/review-of-real-time-3-dimensional-image-guided-radiation-therapy-on-standard-equipped-cancer-radiation-therapy-systems-are-we-at-the-tipping-point-for-the-era-of-real-time-radiation-therapy
#10
Paul J Keall, Doan Trang Nguyen, Ricky O'Brien, Pengpeng Zhang, Laura Happersett, Jenny Bertholet, Per R Poulsen
PURPOSE: To review real-time 3-dimensional (3D) image guided radiation therapy (IGRT) on standard-equipped cancer radiation therapy systems, focusing on clinically implemented solutions. METHODS AND MATERIALS: Three groups in 3 continents have clinically implemented novel real-time 3D IGRT solutions on standard-equipped linear accelerators. These technologies encompass kilovoltage, combined megavoltage-kilovoltage, and combined kilovoltage-optical imaging. The cancer sites treated span pelvic and abdominal tumors for which respiratory motion is present...
April 14, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29782653/data-driven-gating-in-pet-influence-of-respiratory-signal-noise-on-motion-resolution
#11
Florian Büther, Iris Ernst, Lynn Johann Frohwein, Joost Pouw, Klaus Peter Schäfers, Lars Stegger
PURPOSE: Data-driven gating (DDG) approaches for positron emission tomography (PET) are interesting alternatives to conventional hardware-based gating methods. In DDG, the measured PET data themselves are utilized to calculate a respiratory signal that is subsequently used for gating purposes. The success of gating is then highly dependent on the statistical quality of the PET data. In this study we investigate how this quality determines signal noise and thus motion resolution in clinical PET scans using a center-of-mass-based (COM) DDG approach, specifically with regard to motion management of target structures in future radiotherapy planning applications...
May 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29782242/case-254-posttraumatic-migrating-fat-embolus-causing-fat-emboli-syndrome
#12
Sébastien Molière, Stéphane Kremer, Guillaume Bierry
History An otherwise healthy 18-year-old man was admitted to the emergency department with a closed displaced fracture of the left femoral shaft ( Fig 1 ) after a high-velocity motorbike accident. At admission, other physical examination findings were unremarkable. Initial unenhanced and contrast material-enhanced (120 mL of Iomeron 400; Bracco Imaging, Milan, Italy) computed tomography (CT) was performed in the arterial and venous phases from the head to the knees. No abnormalities were noted in the brain or chest at initial CT...
June 2018: Radiology
https://www.readbyqxmd.com/read/29780462/fluorescent-dyes-and-probes-for-super-resolution-microscopy-of-microtubules-and-tracheoles-in-living-cells-and-tissues
#13
Gražvydas Lukinavičius, Gyuzel Y Mitronova, Sebastian Schnorrenberg, Alexey N Butkevich, Hannah Barthel, Vladimir N Belov, Stefan W Hell
We introduce fluorogenic tubulin probes based on the recently reported fluorescent dyes (510R, 580CP, GeR and SiR) and chemotherapy agents - taxanes (docetaxel, cabazitaxel and larotaxel). The cytotoxicity of the final probe, its staining performance and specificity strongly depend on both components. We found correlation between the aggregation efficiency (related to the spirolactonization of fluorophore) and cytotoxicity. Probe optimization allowed us to reach 29 ± 11 nm resolution in stimulated emission depletion (STED) microscopy images of the microtubule network in living human fibroblasts...
April 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29779758/assessing-venous-thrombus-in-renal-cell-carcinoma-preliminary-results-for-unenhanced-3d-ssfp-mri
#14
L C Adams, B Ralla, G Engel, G Diederichs, B Hamm, J Busch, F Fuller, M R Makowski
AIM: To test the potential of unenhanced cardiac- and respiratory-motion-corrected three-dimensional steady-state free precession (3D-SSFP) magnetic resonance imaging (MRI) for the assessment of inferior vena cava (IVC) thrombus in patients with clear-cell renal cell carcinoma (cRCC), compared to standard contrast-enhanced (CE)-MRI and CE-computed tomography (CT). MATERIALS AND METHODS: Eighteen patients with cRCC and IVC thrombus, who received CE-MRI and 3D-SSFP at 1...
May 17, 2018: Clinical Radiology
https://www.readbyqxmd.com/read/29777669/repair-of-thoracic-and-thoracoabdominal-mycotic-aneurysms-and-infected-aortic-grafts-using-allograft
#15
Joel S Corvera, David Blitzer, Hannah Copeland, Daniel Murphy, Philip J Hess, Saila T Pillai, John W Fehrenbacher
BACKGROUND: Mycotic aneurysm of the thoracic or thoracoabdominal aorta and infection of thoracic or thoracoabdominal aortic grafts are challenging problems with high mortality. In-situ reconstruction with cryopreserved allograft(CPA) avoids placement of prosthetic material in an infected field and avoids suppressive antibiotics or autologous tissue coverage. METHODS: Fifty consecutive patients with infection of a thoracic or thoracoabdominal aortic graft or mycotic aneurysm underwent resection and replacement with CPA from 2006 to 2016...
May 16, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29773293/usefulness-of-the-forced-oscillation-technique-in-assessing-the-therapeutic-result-of-tracheobronchial-central-airway-obstruction
#16
Masanori Yasuo, Yoshiaki Kitaguchi, Fumiya Kinota, Makoto Kosaka, Kazuhisa Urushihata, Atsuhito Ushiki, Hiroshi Yamamoto, Satoshi Kawakami, Masayuki Hanaoka
BACKGROUND: Pulmonary function tests (PFTs) comprise the traditional method for detecting central airway obstruction (CAO) and evaluating therapeutic effects, but are effort-dependent. By contrast, the forced oscillation technique (FOT) is performed during tidal breathing in an effort-independent mode and is universally used to assess respiratory function in patients with chronic obstructive pulmonary disease (COPD) and asthma. We used the FOT to measure airway resistance and reactance in patients with CAO before and after interventional bronchoscopy and compared the results to data obtained using PFTs...
May 2018: Respiratory Investigation
https://www.readbyqxmd.com/read/29772057/a-4d-global-respiratory-motion-model-of-the-thorax-based-on-ct-images-a-proof-of-concept
#17
H Fayad, M Gilles, T Pan, D Visvikis
PURPOSE: Respiratory motion reduces the sensitivity and specificity of medical images especially in the thoracic and abdominal areas. It may affect applications such as cancer diagnostic imaging and/or radiation therapy (RT). Solutions to this issue include modelling of the respiratory motion in order to optimize both diagnostic and therapeutic protocols. Personalised motion modeling required patient specific four dimensional (4D) imaging which in the case of 4D computed tomography (4D CT) acquisition is associated with an increased dose...
May 17, 2018: Medical Physics
https://www.readbyqxmd.com/read/29770283/cardiac-amyloidosis-diagnosis-with-magnetic-resonance-imaging-a-case-report
#18
Meidi El Issa, Malik El Issa, Besma Sidia
Amyloidosis is a rare disease, which can affect various organs, such as the kidneys, heart, liver, respiratory and gastrointestinal tracts, and the nervous system. It still has a bad prognosis nowadays, despite chemotherapy and the new biotherapies. Its physiopathology corresponds to an irreversible, extracellular accumulation of fibrillous proteins in the tissues. Notwithstanding the fact that a clear diagnosis can be made with histology (of solid injured organs or a subcutaneous biopsy), magnetic resonance imaging (MRI) can show various advantages, especially to prove cardiac involvement, with great specificity and sensibility as well...
March 15, 2018: Curēus
https://www.readbyqxmd.com/read/29765792/stereotactic-mri-guided-adaptive-radiation-therapy-smart-for-locally-advanced-pancreatic-cancer-a-promising-approach
#19
Elaine Luterstein, Minsong Cao, James Lamb, Ann C Raldow, Daniel A Low, Michael L Steinberg, Percy Lee
Locally advanced pancreatic cancer (LAPC) is characterized by poor prognosis and low response durability with standard-of-care chemotherapy or chemoradiotherapy treatment. Stereotactic body radiation therapy (SBRT), which has a shorter treatment course than conventionally fractionated radiotherapy and allows for better integration with systemic therapy, may confer a survival benefit but is limited by gastrointestinal toxicity. Stereotactic MRI-guided adaptive radiation therapy (SMART) has recently gained attention for its potential to increase treatment precision and thus minimize this toxicity through continuous real-time soft-tissue imaging during radiotherapy...
March 14, 2018: Curēus
https://www.readbyqxmd.com/read/29764740/are-computed-tomography-3d-measurements-of-the-upper-airways-in-mouth-breathing-children-in-agreement-with-the-ent-clinical-diagnosis-of-obstruction
#20
Bruno César Ladeira Vidigal, Carolina Morsani Mordente, Paula Loureiro Cheib, Flávio Ricardo Manzi, Letícia Paiva Franco, Helena Maria Gonçalves Becker, Bernardo Quiroga Souki
INTRODUCTION: Imaging studies have hystorically been used to support the clinical otorhinolaryngological evaluation of the upper respiratory tract for the diagnosis of obstructive causes of oral breathing. OBJECTIVE: The objective of this study was to compare 3D volumetric measurements of nasal cavity, nasopharynx and oropharynx of obstructed mouth-breathing children with measurements of non-obstructed mouth-breathing children. METHODS: This retrospective study included 25 mouth-breathing children aged 5-9 years evaluated by otorhinolaryngological clinical examination, flexible nasoendoscopy and full-head multi-slice computed tomography...
March 11, 2018: Brazilian Journal of Otorhinolaryngology
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