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Evaluation du piegeage expiratoire au scanner: correlation avec les epreuves respiratoires
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43. French meeting on radiology; 43. Journee Francaise de Radiologie; Paris (France); 26 Oct 1995
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[en] As an alternative to chemical thrombolysis, an acutely occluded transjugular intrahepatic portosystemic stent shunt in a 72-year-old woman was successfully recanalized using a 5 Fr rheolytic catheter system. No adjunctive thrombectomy treatment was necessary. The underlying stenotic leason was treated with percutaneous transluminal angioplasty and a Palmaz stent. Immediately after the intervention optimal shunt flow was achieved. Ascites vanished within a few days and no further bleeding complications appeared
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Copyright (c) 1996 Springer-Verlag New York Inc.; Country of input: International Atomic Energy Agency (IAEA)
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(c) 2007 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA)
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Available from: http://dx.doi.org/10.1007/s00247-009-1367-6
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Winzige Fresszellen als Indiz. Kleine Makrophagen kennzeichnen chronisch obstruktive Lungenerkrankungen
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Mensch + Umwelt (Oberschleissheim); ISSN 0949-0671;
; (no.1); p. 3-4

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ECR 2002: 14. European congress of radiology; Vienna (Austria); 1-5 Mar 2002
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[en] The purpose of this study was to evaluate the effects of prone positioning on pulmonary perfusion using flow-sensitive alternating inversion recovery (FAIR), a noninvasive magnetic resonance imaging technique that requires no contrast medium. Seven healthy volunteers were studied in the supine and prone positions under three respiratory conditions: normal breathing of room air, unassisted breathing of 45% O2, and controlled mechanical ventilation (CMV) with positive end-expiratory pressure. Signal intensities (SIs) were obtained from ventral, middle, and dorsal regions on sagittal lung images and dependent/nondependent SI ratios were calculated to evaluate pulmonary perfusion distribution. In the supine position, SIs increased significantly from the ventral to dorsal region under all three respiratory conditions and prone positioning inverted the perfusion distribution under all conditions. Right lung SI ratios were 2.34 ± 0.29, 2.74 ± 0.66, and 2.42 ± 0.73 in the supine position and 1.68 ± 0.48, 1.78 ± 0.36, and 1.92 ± 0.21 in prone for room air, 45% O2, and CMV, respectively. The difference between supine and prone positions was statistically significant. The left lung showed a similar pattern and the difference was significant only under CMV. No difference was observed between the different respiratory conditions in both lungs. This study demonstrated that the distribution of pulmonary perfusion was more uniform in prone than in the supine position. (orig.)
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Available from: http://dx.doi.org/10.1007/s00330-007-0808-6
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[en] N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) induced preneoplastic variants of rat tracheal epithelial (RTE) cells can be neo plastically transformed following transfection with oncogenic DNA. Variants differ with respect to the oncogenes required for neoplastic conversion. Polyma virus DNA transformed each of four variants neo plastically, whereas viral ras DNA only transformed two of four variants. These data demonstrate that preneoplastic variants of RTE cells differ with respect to the changes needed for conversion to neoplastic cells and that the variants tested are either at different stages or on different pathways of progression to neoplasia. (author)
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Mauderly, J.L.; Mewhinney, J.A.; Bechtold, W.E.; Sun, J.D.; Coons, T.A. (eds.); Inhalation Toxicology Research Institute, Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM (United States). Funding organisation: Office of Health and Environmental Research, U.S. Department of Energy (United States); 659 p; Dec 1988; p. 370-373; 4 refs, 2 figs, 1 tab
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AbstractAbstract
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Original Title
Detection du piegeage expiratoire: TDM spiralee en expiration dynamique versus TDM-HR en expiration bloquee
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43. French meeting on radiology; 43. Journee Francaise de Radiologie; Paris (France); 26 Oct 1995
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[en] AIMS: To document the presence and extent of air trapping on high resolution computed tomography (HRCT) in patients with pulmonary sarcoidosis and correlate HRCT features with pulmonary function tests. METHODS: Twenty-one patients with pulmonary sarcoidosis underwent HRCT and pulmonary function assessment at presentation. Inspiratory and expiratory HRCT were assessed for the presence and extent of air trapping, ground-glass opacification, nodularity, septal thickening, bronchiectasis and parenchymal distortion. HRCT features were correlated with pulmonary function tests. RESULTS: Air trapping on expiratory HRCT was present in 20/21 (95%) patients. The extent of air trapping correlated with percentage predicted residual volume (RV)/total lung capacity (TLC) (r = 0.499;P < 0.05) and percentage predicted maximal mid-expiratory flow rate between 25 and 75% of the vital capacity (r = -0.54;P < 0.05). Ground-glass opacification was present in four of 21 (19%), nodularity in 18/21 (86%), septal thickening in 18/21 (86%), traction bronchiectasis in 14/21 (67%) and distortion in 12/21 (57%) of patients; there were no significant relationships between these CT features and pulmonary function results. CONCLUSION: Air trapping is a common feature in sarcoidosis and correlates with evidence of small airways disease on pulmonary function testing. Davies, C.W.H. (2000). Clinical Radiology 55, 217-221
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S0009926099903665; Copyright (c) 2000 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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