1,211 research outputs found
Use of balloon catheter dilation vs. traditional endoscopic sinus surgery in management of light and severe chronic rhinosinusitis of the frontal sinus: a multicenter prospective randomized study
OBJECTIVE: Chronic rhinosinusitis (CRS) of the frontal sinus is a complex pathological condition and many surgical techniques were described to treat this area endoscopically, like traditional endoscopic sinus surgery (ESS) and balloon catheter dilation (BCD).
PATIENTS AND METHODS: We designed a multicenter prospective randomized study to assess the validity and safety of BCD vs. ESS in symptomatological chronic rhinosinusitis of the frontal sinus enrolling a population of 102 adult patients (64 men and 38 women; overall 148 frontal sinuses studied) with non-polypoid CRS. For a better evaluation of the disease, in our study we decided to analyze both radiological (Lund-McKay CT scoring modified by Zinreich) and symptomatological results (SNOT-20 questionnaire). We divided the population affected in two groups, one with light/mild frontal CRS and the other with moderate/severe frontal CRS, basing on radiological findings at Lund-MacKay modified by Zinreich score. Every group was divided in two subgroups, in one we used BCD and in the other we used traditional ESS.
RESULTS: The current literature does not support the suggestion that indications for BCD and ESS are identical, and additional research is needed to determine the role for BCD in specific patient populations. The results showed a not statistically significative difference between BCD and conventional ESS of the frontal sinus in patients with light/mild CRS and in patients with moderate/severe CRS at Lund-Mackay modified by Zinreich score. The same not statistically significative difference was observed comparing the results of SNOT-20 questionnaire in the group of light/mild frontal chronic rhinosinusitis. However, we noticed a statistically significant better outcome of SNOT-20 score in patients with moderate/severe chronic rhinosinusitis that underwent BCD of frontal sinus compared to ESS.
CONCLUSIONS: BCD and ESS are two alternative weapons in the baggage of every endoscopic surgeon, even because they present similar outcomes, safeness and effectiveness both in light/mild and moderate/severe chronic rhinosinusitis of the frontal sinus. An interesting result of our study was the statistically significant better outcome of SNOT-20 score in patients that underwent BCD of frontal sinus for a moderate/severe CRS, compared to those that underwent a traditional ESS
Visualization, Exploration and Data Analysis of Complex Astrophysical Data
In this paper we show how advanced visualization tools can help the
researcher in investigating and extracting information from data. The focus is
on VisIVO, a novel open source graphics application, which blends high
performance multidimensional visualization techniques and up-to-date
technologies to cooperate with other applications and to access remote,
distributed data archives. VisIVO supports the standards defined by the
International Virtual Observatory Alliance in order to make it interoperable
with VO data repositories. The paper describes the basic technical details and
features of the software and it dedicates a large section to show how VisIVO
can be used in several scientific cases.Comment: 32 pages, 15 figures, accepted by PAS
1.65 micrometers (H-band) surface photometry of galaxies. III: observations of 558 galaxies with the TIRGO 1.5m telescope
We present near-infrared H-band (1.65 micron) surface photometry of 558
galaxies in the Coma Supercluster and in the Virgo cluster. This data set,
obtained with the Arcetri NICMOS3 camera ARNICA mounted on the Gornergrat
Infrared Telescope, is aimed at complementing, with observations of mostly
early-type objects, our NIR survey of spiral galaxies in these regions,
presented in previous papers of this series. Magnitudes at the optical radius,
total magnitudes, isophotal radii and light concentration indices are derived.
We confirm the existence of a positive correlation between the near-infrared
concentration index and the galaxy H-band luminosity. (Tables 1 and 2 are only
available in electronic form upon request to [email protected])Comment: 12 pages, 6 figures. Accepted for publication in A&A
Los hechos reveladores de la cesación de pagos en nuestro derecho y los "acts of bankruptcy" en el derecho anglosajón
Acts of BankruptcyFil: Franzetti, Carlos A. Universidad de Buenos Aires. Facultad de Derecho. Buenos Aires, Argentin
1.65 micrometers (H-band) surface photometry of galaxies. IV:observations of 170 galaxies with the Calar Alto 2.2m telescope
We present near-infrared (H band) surface photometry of 170 galaxies,
obtained in 1997 using the Calar Alto 2.2m telescope equipped with the NICMOS3
camera MAGIC. The majority of our targets are selected among bright members of
the Virgo cluster, however galaxies in the A262 and Cancer clusters and in the
Coma/A1367 supercluster are also included. This data set is aimed at
complementing the NIR survey in the Virgo cluster discussed in Boselli et al.
(1997) and in the Coma Supercluster, presented in Papers I, II and III of this
series. Magnitudes at the optical radius, total magnitudes, isophotal radii and
light concentration indices are derived. (Tables 1 and 2 are only available in
electronic form upon request to [email protected])Comment: 11 pages, 6 figures. Accepted for publication in A&A
Spectroscopic surveys:a different approach to data reduction
We present VIPGI, an automatized human supervised reduction environment,
developed within the VIRMOS project to handle VIMOS guaranteed time data. VIPGI
is now offered to the international community to be used on site in Milano and
Marseille. Born to handle the highly multiplexed MOS VIMOS data, it has been
extended to accomodate also IFU data. The widespread and extensive use of VIPGI
has suggested the idea of an integrated environment allowing users not only to
reduce, but also to organize data in logical structures, to insert results in a
database, and use any user defined plugin for data reduction, analysis and
inspection. See http://cosmos.mi.iasf.cnr.it/pandoraComment: Astronomical Data Analysis III conference proceedin
La nacionalidad de las sociedades
Fil: Franzetti, Carlos A. Universidad de Buenos Aires. Facultad de Derecho. Buenos Aires, Argentin
- …