1,721,091 research outputs found
Prebiopsy 68Ga-PSMA PET imaging. can we improve the current diagnostic pathway for prostate cancer?
No full textProstate-specific membrane antigen (PSMA) positron emission tomography (PET) is rapidly expanding in the diagnostic pathway of prostate cancer (PCa). 68Ga-PSMA PET/CT, the most studied PSMA radiotracer, is currently recommended in case of biochemical recurrence after radical prostatectomy [1]. It is also being progressively used before surgery [2] for primary staging of highrisk prostate cancer, particularly when conventional imaging is negative with high clinical suspicion of metastatic disease
Editorial. new horizons in robotic platforms
No full textAt the beginning of the 21st century, the first Intuitive Surgical Da Vinci system was introduced. Historically, the AESOP and ZEUS systems were the first robots adopted in general surgery before Intuitive and American Computer Motion merged into a single company. By 2023, over 7500 robotic platforms have been installed, with over 11 million surgeries performed worldwide. The success of the robotic platform relies on the magnification, 3D imaging, motion scaling, tremor filtration, dexterity and quick learning curve of the machine. After many years of monopoly by Intuitive, several companies have proposed new robotic platforms that may challenge the Da Vinci system [1]
The impact of obesity on the predictive accuracy of PSA in men undergoing prostate biopsy
No full textPurpose: Obese men have been reported to have lower serum PSA values relative to normal-weight men in population-based studies, screening cohorts, and in men with prostate cancer (CaP) treated with surgery. There are concerns that PSA may be less accurate in detecting prostate cancer in men with increased body mass index (BMI). We determine whether the diagnostic potential of PSA is negatively influenced by obesity by comparing its operating characteristics across BMI categories among men undergoing prostate biopsy. Methods: Demographic, clinical, and histopathological data on 917 men who underwent trans-rectal ultrasound-guided prostate needle biopsy from 2002 to 2010 at a University hospital in Italy were used in the study. Men were categorized for BMI as follows: <25 kg/m 2 (normal weight), 25-29.9 kg/m 2 (overweight), and ≥30 kg/m 2 (obese). Receiver operator characteristics (ROC) curves were used to assess PSA accuracy for predicting prostate cancer overall and then stratified according to digital rectal examination (DRE) findings using the area under the ROC curve (AUC). Results: The obesity rate of the study cohort was 21 %. There was no statistically significant difference in the overall AUCs of PSA for predicting CaP among normal-weight (AUC = 0.56), overweight (AUC = 0.60), and obese men (AUC = 0.60; p = 0.68) in either DRE-positive or negative men. Conclusions: In a cohort of Italian men undergoing prostate biopsy, the performance accuracy of PSA as a predictor of CaP is not significantly altered by BMI. Obesity does not negatively impact the overall ability of PSA to discriminate between CaP and benign conditions. © 2012 Springer-Verlag
New treatment strategies for benign prostatic hyperplasia in the frail elderly population: A systematic review
No full textINTRODUCTION: Life expectancy is constantly increasing and as a consequence older men, frequently with multiple comorbidities, are seeking treatment for benign prostatic hyperplasia. Given their frail health, these men need extreme attention in their management, as efficacious and safe treatment strategies in the general population may not be adequate for them. EVIDENCE ACQUISITION: The National Library of Medicine Database was searched for relevant articles published between 2006 and 2015. Each article's title, abstract and text were reviewed for their appropriateness and their relevance. 57 articles were eligible for the review. EVIDENCE SYNTHESIS: In the elderly and frail, α1-antagonists should be used with caution given the risk of orthostatic hypotension and consequent falls, cause of significant morbidity in the elderly. 5ARIs present a good safety profile. Anticholinergics must also be prescribed with caution, given the risk of aggravating symptoms of dementia due to a central blockage of cholinergic neuronal pathways. Prostatic urethral lift is a medical device with low morbidity and valid functional results, which appear to endure over time. Prostatic artery embolization is demonstrating good results with minimal complication rates. Laser prostate vaporization or enucleation is also safe in elderly men and in those receiving anticoagulation therapy, due to its excellent hemostatic effect on prostatic tissue. CONCLUSIONS: Urologists should be familiar with the safety and efficacy profile of medical and surgical therapy in the elderly population, given the inevitable increase in older patients which we will observe in the near future.SCOPUS: re.jinfo:eu-repo/semantics/publishe
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
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