1,720,994 research outputs found
Contrast-enhanced 18F-FDG PET/CT to differentiate primary cardiac lymphoma from primary cardiac angiosarcoma
No full textPerforming an additional lateral decubitus PET/CT scan to resolve a respiratory motion artifact
No full textRespiratory motion artifacts may affect whole body 18F-FDG PET / CT scans interpretation, especially when lesions are localized between the liver and lung. We report a case of a patients affected by breast cancer who underwent PET/CT after therapy; a focal 18F-FDG uptake of not univocal interpretation was observed between liver and pleura. A subsequent acquisition on the right lateral decubitus showed the pleural location of lesion, thus improving the diagnostic accuracy of the PET/CT finding
Time-efficient cardiac imaging: early post-injection stress-first protocol myocardial perfusion SPECT with a CZT camera
No full text2-[18F]-FDG PET/CT role in detecting Richter's transformation of Chronic Lymphocytic Leukemia and predicting overall survival
No full textDifferent uptake of 123I-MIBG in the two main liver lobes: A persistant unsolved mistery
No full textPurpose
After radiopharmaceutical injection, a heightened 123I-MIBG concentration is frequently observed in the left hepatic lobe compared to the right one, but the reason of this finding remains unknown. Our aim was to retrospectively analyze the different 123I-MIBG uptake pattern between the two hepatic lobes and correlate our results with some epidemiological/clinical features.
Methods
Ninety-four 123I-MIBG scintigraphies from 71 patients were selected. Regions of interest were drawn in the right and left lobes using transverse tomographic sections and left to right activity ratios (L/R ratio) were calculated at 6 and 24 h after radiotracer administration.
Results
Twenty-seven examinations were positive for hypermetabolic lesions while the remaining 67 were negative. In all cases mean early and delayed L/R ratios were greater than 1.00; average early L/R ratio was 1.37 and delayed L/R ratio 1.52. The delayed L/R ratio was significantly higher than the early one. There was no difference in the L/R ratios with regard to age, gender, primary disease and result of scintigraphy.
Conclusions
123I-MIBG uptake was higher in left hepatic lobe compared to right and this ratio did not correlate with any epidemiological or clinical feature. The reason of this metabolic is not yet explained and some biomolecular hypotheses could be tested in 3D dynamic in vitro models
Radioguided lung lesion localization: introducing a fluoroscopy system in a SPECT/CT scan
No full textThe purpose was to report our experience in the use of radiotracer localization and resection of small, indistinct, or nonpalpable pulmonary lesions. We developed an innovative technique implementing a fluoroscopy system on a single-photon emission computed tomography/computed tomography (SPECT/CT) scan that allowed to perform CT-guided injection of radiotracer directly on SPECT/CT
The Role of [18F]FDG PET Imaging for the Assessment of Pulmonary Lymphangitic Carcinomatosis: A Comprehensive Narrative Literature Review
No full text
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
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