Search results for "Contrast"

Atypical liver hemangiomas: contrast enhancement patterns with SH U 508A and pulse inversion ultrasound

2003

All congruences below stability-preserving fair testing or CFFD

2020

AbstractIn process algebras, a congruence is an equivalence that remains valid when any subsystem is replaced by an equivalent one. Whether or not an equivalence is a congruence depends on the set of operators used in building systems from subsystems. Numerous congruences have been found, differing from each other in fine details, major ideas, or both, and none of them is good for all situations. The world of congruences seems thus chaotic, which is unpleasant, because the notion of congruence is at the heart of process algebras. This study continues attempts to clarify the big picture by proving that in certain sub-areas, there are no other congruences than those that are already known or …

Resolution Enhancement in Phase Microscopy: a Review

2018

Quantitative phase microscopy (QPM), a technique combining phase imaging and microscopy, enables visualization of the 3-D topography in reflective samples as well as the inner structure or refractive index distribution of transparent and translucent samples. However, as in conventional optical microscopy, QPM provides either a large field of view (FOV) or a high resolution but not both. Many approaches such as oblique illumination, structured illumination and speckle illumination have been proposed to improve the spatial resolution of phase microscopy by restricting other degrees of freedom (mostly time). Therefore, the space bandwidth product (SBP) of QPM becomes enlarged. This paper aims …

LE RADICI ISTITUZIONALI DELLA CORRUZIONE SISTEMICA E L'AZIONE DI CONTRASTO

2016

Lotta al racket e all'usura: la stagione della fiducia

2008

Ricerca promossa dalla Camera di Commercio di Palermo, dalla Confesercenti di Palermo, dalla Confcommercio di Palermo, dalla cooperativa sociale Solidaria POR SICILIA 2000/2006 – sottomisura 3.21C

The use of theranostic gadolinium-based nanoprobes to improve radiotherapy efficacy

2014

International audience; A new efficient type of gadolinium-based theranostic agent (AGuIX) has recently been developed for magnetic resonance imaging (MRI)-guided radiotherapy. These new particles consist of a polysiloxane network surrounded by a number of gadolinium chelates, usually 10. Due to their small size (<5 nm), AGuIX typically exhibit biodistributions that are almost ideal for diagnostic and therapeutic purposes. For example, while a significant proportion of these particles accumulate in tumours, the remainder is rapidly eliminated by the renal route. In addition, these particles present no evidence of toxicity, in the absence of irradiation with up to 10 times the planned dose f…

ESGAR consensus statement on liver MR imaging and clinical use of liver-specific contrast agents

2016

Objectives: To develop a consensus and provide updated recommendations on liver MR imaging and the clinical use of liver-specific contrast agents. Methods: The European Society of Gastrointestinal and Abdominal Radiology (ESGAR) formed a multinational European panel of experts, selected on the basis of a literature review and their leadership in the field of liver MR imaging. A modified Delphi process was adopted to draft a list of statements. Descriptive and Cronbach’s statistics were used to rate levels of agreement and internal reliability of the consensus. Results: Three Delphi rounds were conducted and 76 statements composed on MR technique (n = 17), clinical application of liver-speci…

Depending on music to feel better: Being conscious of responsibility when appropriating the power of music

2014

Abstract This study explores the beliefs held by young people about the power of music to help them feel better during challenging times. Participants included 40 young Australians, aged 13–20, who described their relationship with music and were progressively asked to recall times where music had not been helpful as well as when the consequences of engaging in music had been beneficial. Grounded theory analysis generated a theoretical explanation of why young people's beliefs about the positive consequences of music are so strong, even though the experience of young people with mental health problems sometimes contradicts these views. Implications for professionals are offered; with a part…

Recall of common and uncommon words from pure and mixed lists

1980

Recall of high- and low-frequency words in the conventional free recall paradigm was compared with recall of the same words when subjects were required to count backward before and after the presentation of each word. The addition of this distractor task was associated with a reduction in the high-frequency advantage otherwise found with pure lists containing only high- or low-frequency words. This finding is attributed to the disruption of organizational processes. In contrast, the low-frequency advantage found with conventional presentation of mixed lists, containing high- and low-frequency words, was not reduced by distraction. These findings indicate that the frequency effects obtained …

Utilidad de la ecografía con contraste intravenoso en la valoración de la recurrencia postquirúrgica de la enfermedad de Crohn

2016

Introducción: La recurrencia postquirúrgica es una situación frecuente en la enfermedad de Crohn (EC). La utilidad de la valoración clínica y analítica para el diagnóstico de recurrencia es limitado y actualmente, la técnica de referencia es la ileocolonoscopia que permite la valoración de la anastomosis ileocólica y/o del intestino proximal a la misma. Mediante el Índice de Rutgeerts se puede determinar la gravedad de la recurrencia que está relacionada con el desarrollo precoz de recurrencia clínica y necesidad de nueva cirugía. No obstante la técnica endoscópica, es una prueba con escasa aceptación por la paciente, no exenta de riesgos y limitaciones como la imposibilidad de franquear la…