1,721,109 research outputs found
Radiologia Interventistica Epatobiliare
No full textInterventistica biliare nelle lesioni iatrogene delle vie biliari e negli itteri ostruttivi.
L’iter diagnostico nei pazienti con ittero ostruttivo viene oggi affidato all’impiego di metodiche di imaging non invasive quali l’ecografia epato-biliare e la colangiografia mediante Risonanza Magnetica Nucleare (MRCP), riservando alla colangiografia per via percutanea (PTC) un ruolo diagnostico molto limitato
La Risonanza Magnetica con doppio contrasto (Gadolinio + Ferucarbotran) può sostituire la TC Spirale come seconda metodica d'imaging nella diagnosi del piccolo epatocarcinoma
No full textCan double contrast MR imaging (gadolinium-enhanced and ferucarbotran-enhanced MR imaging) replace triple phase multidetector CT as the second imaging modality for the diagnosis of small HCC (< 3 mm)?
No full textTransarterial chemoembolization in downstaging program for hepatocellular carcinoma prior to liver transplantation: the Bologna work-in-progress experience.
No full textPurpose: To assess the efficacy and the safety of transarterial chemoembolization (TACE) on long-term survival and tumor recurrence rate in down-staging patients with hepatocellular carcinoma (HCC) listed for liver transplantation (LT): a new allocation policy still under evaluation.
Methods and Materials: We prospectively analyzed with an intention-to-treat principle the outcome of 173 patients listed for LT with a diagnosis of HCC. HCCs were divided into three groups: single nodule <3 cm (T1, 38 patients), single nodule <5 cm or multiple nodules 3 with a diameter <3 cm (T2, 94 patients) meeting the conventional Milan criteria, and the down-stage group (T3, 41 patients): single HCC !6 cm or multiple nodules <6 with a total tumor diameter <12 cm. TACE was performed in a total of 114 patients (65.9%): 15 in T1 (39.5%), 61 in T2 (64.9%), 38 in T3 (92.7%).
Results: The rate of LT was equally distributed among the three groups (47.4% T1, 55.3% T2, and 56.1% T3) and after a median follow-up of 21 months, the overall tumor recurrence rate was 12% and the overall patient survival was 83%. The HCC recurrence rate was comparable among the three groups (7.1% T1, 14.3% T2, and 13% T3) and the presence of HCC recurrence did not affect significantly the patients' survival.
Conclusion: The pre-operative tumor stage did not affect the patients' survival and in particular the down-stage group had comparable outcome than the other groups. TACE is effective and safe as a down-staging procedure to extend pre-operative selective criteria for HCC patients waiting for LT
FUNCTIONAL IMAGING IN RECTAL PROLAPSE
No full textImaging data has gained relevance in the preoperative assessment of severe pelvic organ prolapse, including vaginal vault descent, enterocele, rectocele and cystocele
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
Chemioembolizzazione transarteriosa nel protocollo di downstaging dell'epatocarcinoma prima del trapianto ortotopico di fegato: l'esperienza del gruppo di Bologna
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