1,721,009 research outputs found
Optical imaging in lung cancer—follow the light, towards molecular imaging–guided precision surgery
No full textDETECTION OF BONE METASTASES AND EVALUATION OF THERAPY RESPONSE IN PROSTATE CANCER PATIENTS BY RADIOLABELLED CHOLINE PET/CT
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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
PET guidance in prostate cancer radiotherapy: Quantitative imaging to predict response and guide treatment
No full textPositron emission tomography (PET) allows a monitoring and recording of the spatial and temporal distribution of molecular/cellular processes for diagnostic and therapeutic applications.The aim of this review is to describe the current applications and to explore the role of PET in prostate cancer management, mainly in the radiation therapy (RT) scenario.The state-of-the art of PET for prostate cancer will be presented together with the impact of new specific PET tracers and technological developments aiming at obtaining better imaging quality, increased tumor detectability and more accurate volume delineation.An increased number of studies have been focusing on PET quantification methods as predictive biomarkers capable of guiding individualized treatment and improving patient outcome; the sophisticated advanced intensity modulated and imaged guided radiation therapy techniques (IMRT/IGRT) are capable of boosting more radioresistant tumor (sub)volumes.The use of advanced feature analyses of PET images is an approach that holds great promise with regard to several oncological diseases, but needs further validation in managing prostate diseases
PET/MRI in gynecological tumors
No full textThe diagnostic approach to gynecological tumors includes anatomical and molecular imaging methods, representing a strong support for clinicians to define tumor extension, to plan the best treatment strategy and patient management. The possibility of combining morphological and functional information in a single examination, using hybrid positron emission tomography/magnetic resonance imaging (PET/MRI) technique, represents a very promising tool in the different settings of gynaecologic tumors. In the present review, the current literature and potential clinical applications of PET/MRI in the most common types of gynecological tumors are discussed. The role of PET/MRI is in staging, restaging and after treatment of gynecological tumors is presented, focusing on cervical, endometrial and ovarian cancer. Moreover, the diagnostic accuracy of PET/MRI and the correlation between quantitative parameters (standardized uptake value and apparent diffusion coefficient) of PET/MRI hybrid systems are briefly reviewed
Reply to the letter "Choline PET/CT compared with bone scintigraphy in the detection of bone metastases in prostate cancer patients"
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