Search results for "Lung"
showing 10 items of 2389 documents
Association between greenspace and lung function in Italian children-adolescents
2022
Background: Few studies have examined the impact of urban greenspace exposure on lung function in children-adolescents, and the available evidence is still inconsistent. The aim of the current study was to verify the hypothesis that the effects of greenspace exposure vary with differing levels of lung function of children-adolescents. Methods: Between November 2005 and May 2006, 2150 children-adolescents (age-range: 10-15 years) living in the city of Palermo were enrolled in a cross-sectional survey. Parents were interviewed through a modified version of the Italian Studies on Respiratory Disorders in Children and the Environment (SIDRIA) questionnaire. All children-adolescents performed sp…
Automatic Segmentation of Pulmonary Lobes in Pulmonary CT Images using Atlas-based Unsupervised Learning Network
2020
Pulmonary lobes segmentation of pulmonary CT images is important for assistant therapy and diagnosis of pulmonary disease in many clinical tasks. Recently supervised deep learning methods are applied widely in fast automatic medical image segmentation including pulmonary lobes segmentation of pulmonary CT images. However, they require plenty of ground truth due to their supervised learning scheme, which are always difficult to realize in practice. To address this issue, in this study we extend an existed unsupervised learning network with an extra pulmonary mask constraint to develop a deformable pulmonary lobes atlas and apply it for fast automatic segmentation of pulmonary lobes in pulmon…
Immobilized glycolipids from human diploid fibroblasts inhibit DNA synthesis of cultured human fibroblasts*1
1987
Several previous studies have shown that glycolipids isolated from plasma membranes of cultured cells and added to cells in culture inhibit the growth rate in a concentration-dependent fashion. In order to investigate the possible involvement of glycolipids in the growth regulation of normal cells by cell-cell contacts, we tested the effect of immobilized glycolipids, isolated from human fibroblasts, on the DNA synthesis of freshly seeded fibroblasts. Gangliosides inhibited DNA synthesis to a great extent, whereas neutral glycolipids had only a minor effect. The degree of inhibition of DNA synthesis by immobilized gangliosides depended both on the cell density of the cultures from which the…
Les traitements péri-opératoires des cancers bronchiques non à petites cellules (CNPC) : standards actuels et perspectives
2019
Resume La chirurgie est le traitement de reference des CNPC de stades I, II et IIIA. Plusieurs essais randomises de phase III de chimiotherapie adjuvante ou neoadjuvante avec une chimiotherapie a base de platine ont ete menes dans les cancers de stades I, II et IIIA. Ces essais ont demontre un gain de survie significatif de la chimiotherapie adjuvante ou neoadjuvante evalue a 5 % a 5 ans dans les stades II et IIIA. Ce benefice a ete confirme par deux meta-analyses sur donnees individuelles. En revanche pour les stades I, le benefice de la chimiotherapie n’est que suggere dans les stades IB > 4 cm. La place de la radiotherapie adjuvante dans les tumeurs N2, sera precisee par l’essai Lung-ART…
Neue Entwicklungen in der MRT des Thorax
2001
Wegen technischer und physikalischer Einschrankungen wurde die MRT bisher nur selten zur Darstellung der Lunge eingesetzt. Neue Entwicklungen haben allerdings die Moglichkeiten der anatomischen Darstellung mittels MRT erheblich verbessert und gleichzeitig neue Perspektiven fur funktionelle Darstellungen eroffnet. Dazu gehoren Techniken zur funktionellen Untersuchung der Perfusion (Kontrastmittel, MR-Angiographie) und der Ventilation der Lunge (inhalierte aerosolierte Kontrastmittel, Sauerstoff, hochpolarisierte Edelgase [He-3, Xe-129] und fluorinierte Gase [SF6]). Die Gleichmasigkeit der Ventilation, Bestimmung von Lungenvolumina, Grose der Luftraume, intrapulmonale Sauerstoffkonzentration,…
Das neurogene Lungenödem
1997
Das Neurogene Lungenodem (NLE) ist eine seltene, aber immer lebensbedrohliche Komplikation bei Patienten mit ZNS-Lasionen. Ein NLE mus immer dann angenommen werden, wenn sich nach einer Schadigung des zentralen Nervensystems akut ein pulmonales Odem entwickelt und andere Ursachen fur die pulmonalen Veranderungen, wie z.B. Aspiration, primar myokardiales Versagen oder toxische Einwirkungen ausgeschlossen werden konnen. Die verschiedenen Atiologien haben alle ein gemeinsames Charakteristikum: es handelt sich um akute Erkrankungen, die plotzlich zu erhohtem intrazerebralem Druck (ICP) fuhren. Beschrieben ist das NLE bei Patienten mit Schadel-Hirn-Verletzungen, intrakraniellen Blutungen, Hirnin…
HAWC J2227+610 and its association with G106.3+2.7, a new potential Galactic PeVatron
2020
We present the detection of VHE gamma-ray emission above 100 TeV from HAWC J2227+610 with the HAWC observatory. Combining our observations with previously published results by VERITAS, we interpret the gamma-ray emission from HAWC J2227+610 as emission from protons with a lower limit in their cutoff energy of 800 TeV. The most likely source of the protons is the associated supernova remnant G106.3+2.7, making it a good candidate for a Galactic PeVatron. However, a purely leptonic origin of the observed emission cannot be excluded at this time.
La situation de l’artisanat verrier à Augustodunum dans le contexte des découvertes effectuées en Gaule
2007
Il est rappelé d’abord que les cartes de répartition des ateliers de verriers en Gaule, aux premiers siècles de notre ère, écartent de nombreux sites de transformation de verre brut importé du Proche-Orient, au motif qu’on n’y a pas retrouvé de déchets exploitables d’un point de vue typologique. Mais les traces d’activités verrières de cette époque semblent bien plus nombreuses que ne le montrent ces cartes, à l’instar de ce qu’on observe à Autun.Malgré le caractère bien incomplet de nos connaissances sur la répartition des ateliers de verriers anciens de Gaule romaine, cette répartition constitue dès à présent un solide argument en faveur de la prépondérance pour le verre d’un commerce de …
Prevalence and 30-Day Mortality in Hospitalized Patients With Covid-19 and Prior Lung Diseases.
2021
Patients with pre-existing respiratory diseases in the setting of COVID-19 may have a greater risk of severe complications and even death.A retrospective, multicenter, cohort study with 5847 COVID-19 patients admitted to hospitals. Patients were separated in two groups, with/without previous lung disease. Evaluation of factors associated with survival and secondary composite end-point such as ICU admission and respiratory support, were explored.1,271 patients (22%) had a previous lung disease, mostly COPD. All-cause mortality occurred in 376 patients with lung disease (29.5%) and in 819 patients without (17.9%) (Previous lung disease is a risk factor for mortality in patients with COVID-19.…
Assessment of large and small airways wall thickness by HRCT in asthma
2010
Purpose Methods and Materials Results Conclusion References Personal Information