3 documents found, page 1 of 1
Striatal dopamine D2-like receptors availability in obesity and its modulation ...
Ribeiro, Gabriela; Maia, Ana; Cotovio, Gonçalo; Oliveira, Francisco P. M.; Costa, Durval C.; Oliveira-Maia, Albino J.There is significant evidence linking a 'reward deficiency syndrome' (RDS), comprising decreased availability of striatal dopamine D2-like receptors (DD2lR) and addiction-like behaviors underlying substance use disorders and obesity. Regarding obesity, a systematic review of the literature with a meta-analysis of such data is lacking. Following a systematic review of the literature, we performed random-effects ...
Evaluation of the attenuation correction on myocardial perfusion imaging: a pha...
Machado, Marisa; Oliveira, Francisco P. M.; Vieira, Lina Oliveira; Costa, Durval C.Myocardial perfusion imaging (MPI) with single-photon emission computed tomography (SPECT) is important for risk stratification of coronary artery disease. MPI quantification obtained from available images may not be accurate due to several potential sources of error, being photon attenuation, especially in overweight patients, a significant problem. Attenuation maps derived from X-ray computed tomography (CT) ...
Optimization of the global matching between two contours defined by ordered poi...
Oliveira, Francisco P. M.; Tavares, João Manuel R. S.This paper presents a new assignment algorithm with order restriction, developed using the paradigm of dynamic programming. The algorithm was implemented and tested to determine the best global matching between two sets of points that represent the contours to be matched. In the experimental tests done, we used the affinity matrix obtained via the method proposed by Shapiro based on geometric modeling and modal...