1,720,956 research outputs found
La diagnosi precoce delle complicanze polmonari nel paziente onco-ematologico neutropenico febbrile in due passi
No full textObiettivi didattici:
Illustrare come ottimizzare il management del paziente ematologico neutropenico febbrile ad alto rischio di Infezioni Fungine
Invasive (IFI) mediante TC ad alta risoluzione (HRCT) del torace e angio-TC polmonare (CTPA).
Nel paziente neutropenico febbrile sono frequenti le complicanze polmonari infettive con prognosi severa, tra cui quelle ad
eziologia fungina, il cui outcome è strettamente legato alla tempestività della diagnosi.
L’imaging TC ha un ruolo fondamentale nel confermare il sospetto clinico e formulare un’ipotesi diagnostica .
Secondo i criteri EORCT, la diagnosi di IFI è possibile in presenza di un’ampia gamma di quadri HRCT (lesioni nodulari dense, con o senza halo sign, cavitazione o air-crescent sign) che entrano in diagnosi differenziale con altre condizioni infettive (batteri, virus, PJ, ecc...) e non infettive (localizzazione di malattia, BOOP, reazione a farmaci, ecc...).
In tale contesto, l'angiografia TC polmonare (CTPA) si è dimostrata utile nel restringere il ventaglio di possibili diagnosi differenziali in quanto aumenta la performance diagnostica della TC nella diagnosi precoce di IFI potendo documentare la presenza di angioinvasione.
Conclusioni: Nel paziente neutropenico febbrile, la HRCT a bassa dose eseguita precocemente è utile come screening (step1) per
individuare le complicanze polmonari da caratterizzare mediante CTPA (step2)
Segni radiologici di infezione fungina angioinvasiva: il vecchio e il nuovo
No full textPoster didattico.
Scopo: descrivere i principali segni radiologici suggestivi di infezione fungina angioinvasiva (IFI) in pazienti onco-ematologici
neutropenici febbrili.La TC è uno strumento importante nella diagnosi precoce di infezione polmonare fungina in pazienti
immunocompromessi.
Le infezioni fungine invasive (IFI) sono un'importante causa di morbidità e mortalità nei pazienti immunocompromessi con
grave neutropenia (da neoplasie ematologiche o aplasia midollare legata a trapianto di midollo osseo o chemioterapia). La
diagnosi precoce di IFI è fondamentale per poter istituire prontamente l’adeguata terapia antifungina in quanto la prognosi
dipende dalla tempestività del trattamento.
L’imaging radiologico di IFI si basa sul riscontro di segni apprezzabili alla TC ad alta risoluzione (HRCT) tra cui l'halo sign
(HS), l’air crescent sign (ACS), l’hypodense sign (HyS) ed il reversed halo sign (RHS). Recentemente è stato descritto un
ulteriore segno, il vessel occlusion sign (VOS), apprezzabile mediante angio-TC polmonare (CTPA). La stessa metodica
contrastografica consente inoltre di migliorare l’apprezzabilità dell’HyS
Significato del reversed halo sign nei pazienti oncoematologici con neutropenia e febbre
No full textIl presente studio ha lo scopo di valutare la specificità del reversed halo sign (RHS) in pazienti oncoematologici neutropenici
febbrili e di esaminare il RHS in relazione allo stato immunitario
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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