Mario Forjaz Secca
Universidade Nova de Lisboa
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Publication
Featured researches published by Mario Forjaz Secca.
Archive | 2009
Mario Forjaz Secca; Cláudia Quaresma; Filipe Amarante dos Santos
Back pain is a very important problem in modern society. To better understand this problem we need instruments that evaluate the spinal column in a global way.
Archive | 2003
Jean C. Tamraz; Claire Outin; Mario Forjaz Secca; Bassam Soussi
It is well established that the anatomical correlations between brain and skull are very poor and so variable as to made precise topometry difficult and doubtful. Thus, all exact topographical measurement of brain structures requires a careful choice of reliable anatomical reference points. Therefore, any precise topographical analysis of brain structures ought to be performed according to judicious and definite cerebral reference lines based on cutaneous, cranial as well as brain landmarks (Tamraz and Comair).
Archive | 2015
Caridad Borrás; Saide Jorge Calil; Yadin David; N. Pallikarakis; Mario Forjaz Secca
Purchasing, installing, and commissioning radiological equipment may be complex and expensive tasks depending on the type of equipment. Maintaining it so that the manufacturer’s specifications continue to be met years after years of clinical use presents challenges. Updating software may be critical, but it may not be free; yet, it is usually not included in the purchasing price. After the warranty period is over, medical facilities are faced with difficult maintenance choices. And if the equipment is donated, the problems may be even worse, due to lack of spare parts and/or operation and maintenance manuals, or even because of the language of the written instructions and displays, which may be in the original donor’s language. An additional challenge is how to decide when equipment shall be discarded because of obsolescence or safety issues. What is the process and who is to make the decision?
Archive | 2009
Mario Forjaz Secca; Michael D. Noseworthy; Henrique Fernandes; Adrain Koziak
fMRI has been extensively used for the last ten years, however it is not fully understood what it really measures. To map brain function, fMRI is known to make use of a chain of physiological events, from neuronal activation to blood oxygenation, which gives rise to the BOLD signal.
Archive | 2003
Jean C. Tamraz; Claire Outin; Mario Forjaz Secca; Bassam Soussi
Magnetic Resonance Imaging is the modality of choice for studying the spine and more particularly the spinal cord, which benefits a direct evaluation without any need of administration of contrast media intrathecally. Major developments have been acquired with respect to surface coils as well as new pulse sequences, improving images and contrast resolution. Basic principles and strategies in MRI technique need to be preserved and used in spinal imaging.
Clinical Engineering#R##N#From Devices to Systems | 2016
Mario Forjaz Secca
In this chapter some thoughts and considerations on the implementation of clinical engineering in developing countries are discussed, presenting some of its challenges and difficulties. There will be a particular emphasis on Africa, based on the experience of the author.
Acta Médica Portuguesa | 2013
Cláudia Quaresma; Inês Dias; Mario Forjaz Secca; João Goyri-O'Neill; Jorge Branco
OBJECTIVE To present the results of the first application of the new technology - Vertebral Metrics - the analysis of the 3D position of the vertex of each spinous process in pregnant women. MATERIAL AND METHODS The Vertebral Metrics was applied to women without associated pathology in four stages of pregnancy (12, 20, 32, 37 weeks gestation). We applied univariate linear models. RESULTS We found that the differences that occur during pregnancy are more significant at the position y (anteroposterior). It was found also that there is a positive correlation between the biomechanical position of the vertex of each of the vertebrae with the homologous position of rest. DISCUSSION/CONCLUSION Through Vertebral Metrics innovative results could be obtained in analyzing biomechanics of the spine. A device that has different applications can be easily adopted in areas such as orthopedics, neurosurgery, pediatrics and rehabilitation. It should also be noted that this instrument is not exhausted in the sample of this research because it can be further applied to the general population.
Archive | 2011
Cláudia Quaresma; Inês Dias; Mario Forjaz Secca; J. Goyri O’Neill; Jorge Branco
In modern society, pain is a relevant problem of the population in general and of pregnant women in particular, being a common symptom and frequently referred to in pregnancies without any pathology associated. Studies indicate that from 35 to 76% of pregnant women experience pain during the gestational period. Most researchers attribute the etiology of the pain to biomechanical alterations of the spinal column throughout pregnancy, however an in-depth analysis has been delayed by the fact that the analytical processes involved are invasive and, as such, cannot be applied to pregnant women. On the other hand, non-invasive diagnostic methods only allow partial analyses of the spinal column, not offering a global vision. In face of the limitations mentioned we built Vertebral Metrics – an instrument that allows us to identify the x, y and z positions of each of the vertices of the spinal apophyses (vertebrae), giving us a global evaluation of the spinal column, in a standing position. The present work has the objective of presenting the first application of this equipment to 49 pregnant women at four different moments of pregnancy (12, 20, 32 e 37 weeks of gestation). Analyzing the results we can conclude that Vertebral Metrics – is an innovative instrument in the global evaluation of the spinal column in a standing position, allowing a quantitative analysis of its shape and temporal variations.
Archive | 2008
Mario Forjaz Secca; H. M. Fernandes; J. R. Cabral; Alberto Leal
In the context of focal epilepsy, the simultaneous combination of electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) holds a great promise as a technique by which the hemodynamic correlates of interictal spikes detected on scalp EEG can be identified.
Archive | 2003
Jean C. Tamraz; Claire Outin; Mario Forjaz Secca; Bassam Soussi
The neuro-ocular plane (N.O.P.) remains the most accurate cephalic orientation for the investigation and biometrical study as well as for follow-up of diseases of the eyes and the optic nerves in the axial or in the coronal planes. The same applies to the screening and exploration of diseases involving the face and skull base, due to the close parallelism of NOP to the Frankfurt-Virchow anthropological baseline. Several works demonstrated these widely adopted results.