1,720,998 research outputs found
Morphometric evaluation of the Simphysis Pubis joint
No full textThe Symphysis Pubis (SP) joint was investigated by X-ray in 96 adults without any history of disease of the joints. We evaluated the width of this joint by measuring the distance between the two articular surface at three points. We calculated the mean for the three interpubic distances and carried out statistical analysis so as to evaluate if there is a significative difference between the four age classes ( 70) and between males and females. We did not found statistically-significative differences between males and females, and between the age classes; nevertheless, it is to be noted that a slight widening of the SP joint can be seen in the elderly, which is thus not significant. We also noted that the medium part of the SP joint undergoes a larger widening in older people: this is probably due to degenerative changes in the fibrocartilagineous disc and the ligaments
Morphometric analysis of the acromioclavicular joint
No full textThe width of the articular space of the acromioclavicular (AC) joint was investigated to evaluate normal range values and any possible variations in relation to age and sex. Radiographs of the AC joints of 72 males and 28 female (age range: 38-83 yrs) were studied. The articular space width of the AC joint was measured using a semiautomatic computerized system. The measurements were performed bilaterally at the level of smallest distance between the articular surfaces in all the radiograms. The mean value of the articular space width was calculated for all the subjects as a single group, for that of the males and for that of the females. The films were then divided into four groups according to age ( 70 yrs) and the mean value per group was calculated. The values obtained were studied using variance analysis. No significant difference were found in the mean values of the articular space width when males and females were compared as regards to age. However, even if the articular space width diminished, in both sexes, with an increase in age, the differences between age classes were not statistically significant
Does intraoperative platelet-rich plasma improve clinical and structural outcomes after arthroscopic repair of isolated tears of the supraspinatus tendon?
No full textCurrent concepts in tumor imaging with whole-body MRI with diffusion imaging (WB-MRI-DWI) in multiple myeloma and lymphoma
No full textWhole-body MRI (WB-MRI) with diffusion-weighted imaging (DWI) can now be used to stage and restage multiple myeloma (MM) and lymphoma. Magnetic resonance imaging (MRI) is the standard tool to detect BM involvement (BMI). The 2016 diagnostic criteria of the International Myeloma Working Group identify WB-MRI and fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) as the most sensitive imaging techniques for detecting skeletal and extra-skeletal MM invasion, respectively. Preliminary findings have also shown that WB-MRI is better than CT and equal to PET/CT in staging aggressive lymphoma and Hodgkin lymphoma, whereas MRI is better for diagnosing BMI in patients with low-grade lymphoma. Signal intensity (SI) and the apparent diffusion coefficient (ADC) are useful metrics to quantify the chemotherapy response in WB-MRI
Computed tomography perfusion and computed tomography angiography in vasospasm after subarachnoid hemorrhage
No full textBACKGROUND:
The aim of the study was to evaluate the effectiveness and reliability of a combined computed tomography angiography (CTA) and computed tomography perfusion (CTP) approach in the diagnosis of cerebral vasospasm after subarachnoid hemorrhage.
METHODS:
Nineteen patients with clinical signs of arterial vasospasm and positive transcranial Doppler (TCD) were enrolled and underwent CTP. Mean time transit (MTT), cerebral blood flow (CBF) and cerebral blood volume (CBV) values of 20 standardized ROI (regions of interest) were analyzed, and CTA used to measure the gauge of 26 arterial ramifications. CTA measurements were compared with those taken upon hospitalization. Of the 19 patients, 11 were scheduled for digital subtraction angiography (DSA), performed less than 12 hours after execution of the CTA-CTP protocol. The results were compared with findings of DSA and/or clinical follow-up and CT or TCD.
RESULTS:
Computed tomography angiography diagnosis of vasospasm was confirmed in all cases (100% sensitivity and 100% specificity), while CTP yielded 3 false negatives (70% sensitivity and 100% specificity). All patients sent for endovascular treatment had received diagnostic confirmation of vasospasm by angiography. CTP thresholds proved reliable in both diagnosis and indicating treatment.
CONCLUSIONS:
Combined one-shot CT angiography and CT perfusion represents a valid alternative to DSA in the diagnosis and management of cerebral vasospasm
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
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