1,720,965 research outputs found
Rescue Stenting Using Neuroform Atlas Stent During Coiling Protrusion for Ruptured Intracranial Aneurysms
No full text- BACKGROUND: Endovascular coiling is generally
considered as an effective treatment option for ruptured
intracranial aneurysms. Increasing operator experience
and quality of tools determined an improvement of endovascular
cerebral aneurysms’ treatment. However,
procedure-related complications still occur.
The purpose of this study is to report a series of rescue
stenting procedures with the Neuroform Atlas (NA) opencell
stent, for intraprocedural complications during coil
embolization in patients with ruptured intracranial
aneurysms.
- METHODS: Between April 2016 and January 2018, 12
consecutive coil protrusions that occurred during ruptured
aneurysms’ embolizations were rescued using NA stenting
together with tirofiban therapy.
Follow-up was performed with initial magnetic resonance
angiography (MRA) at 1 month and then MRA plus
standard digital subtraction angiography at 11e13 months
after the procedure.
- RESULTS: Technical success was achieved in 100% of
patients. No NA stent delivery/deployment complication
occurred. Initial MRA showed complete occlusion of the
aneurysm, with evidence of blood flow into parent vessels
in 12 out of 12 cases.
At 11e13 months, MRA and digital subtraction angiography
showed 10 complete occlusion cases and 1 partial
occlusion case. At 2 months, 1 death occurred due to
subarachnoid hemorrhage.
-CONCLUSIONS: The open-cell NA stent represents a
rescue option for coil protrusion during endovascular
treatment of ruptured intracranial aneurysms allowing
regular restoration of blood flow and minimizing thromboembolic
events
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
Percutaneous Computed Tomography-Guided Lung Biopsies using a Virtual Navigation Guidance: Our Experience
No full textObjective: To evaluate the effectiveness of a virtual CT-guided navigation system (Sirio-
MASMEC Biomed) in performing lung biopsies, with greater attention to lesions smaller
than 1 cm, compared to the traditional procedure. Methods: This study was approved by
the Ethics Committee of our Institute. Two hundred patients were prospectively selected. Of
these, 100 were subjected to percutaneous procedure with the use of Sirio and 100 to traditional
CT-guided percutaneous procedure. The two methods were compared in terms of
absorbed dose, procedure time, complications, and number of non-diagnostic specimens
(diagnostic success). Results: Sirio has shown a significant reduction in the absorbed dose
and procedure times (p<0.05), with a lower incidence of complications compared to the
traditional procedure. Sirio has also allowed to carry out biopsies of lesions’ diameter
!10 mm, obtaining fewer non diagnostic specimens thus resulting more effective in terms
of diagnostic success. Conclusions: The use of Sirio in sampling biopsy showed a statistically
significant reduction in terms of performed scans and procedural time with lower incidence
of post-procedural complications compared to the traditional percutaneous
procedure, especially for lesions !10mm. The best diagnostic result, the reduction of the
dose absorbed and procedural complications makes the procedures more reliable, safety
and less invasive. In addition, the reduction of execution time will increase the number of
daily interventional procedures improving clinical management
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
