Browsing by Author "Cordova Fraga, Teodoro"

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Electro-Acoustic Device for Hip Dysplasia Assessment
(Chiminform Data SA, 2016) Perez Oliva, Huetzin; Cordova Fraga, Teodoro; Padilla Raygoza, Nicolas; Francisco, Jose; Gomez Aguilar,; Baleanu, Dumitru; Sosa, Modesto; Bernal, Jesus; Guzman-Cabrera, Rafael
A device for making diagnosis of dysplasia at the development fracture in newborns, assessment of osteoporosis and injuries of the skeletal system is presented. Its functioning is based on generation of acoustic resonance by sound transmitted through the bone under study. The device operates with a transmitter and an acoustic receiver coupled to the surface, just above the bone area under study. The measurements at the femoral bone in newborns indicate that the dominant frequency is around 160 Hz, which is consistent with other studies. Data comparisons with ultrasound technique suggest that this device could be an alternative for both dysplasia's studies of the hipbone and estimations of bone density.
Magnetic Stimulation on Human Blood Electromotive force analysis
(Chiminform Data SA, 2018) Cordova Fraga, Teodoro; Maria Magdaleno, Dulce; Gomez Aguilar, Jose Francisco; Olivia Murillo, Blanca; Sosa, Modesto; Baleanu, Dumitru; Guzman Cabrera, Rafael
In this work a comparative theoretical analysis vs. experimental study on human blood under a magnetic field stimulation is presented. Twenty samples of leukoreduced human blood were stimulated alternant magnetic field using a Helmholtz coil system; this magnetic field induced an electromotive force in them. Theoretical calculations were performed for the induced electromotive force in a simple model of blood tissue under magnetic stimulation at frequencies: 50 Hz, 100 Hz, 800 Hz, and 1500 Hz. Experimental measurement was performed at the same frequencies for comparison purposes. Results show a high correlation between theoretical and experimental study, as well as effects of agglutination in the stimulated blood cells.
A Micro Magnetic Stimulator
(Chiminform Data S A, 2016) Cordova Fraga, Teodoro; Baleanu, Dumitru; De La Roca Chiapas, Jose Maria; Perez Oliva, Hueztin Aaron; Maldonado Moreles, Martin Alejandro; Alayli, Yasser; Alvarado, Jose De Jesus Bernal; Guzman Cabrera, Rafael; Matematik
Transcranial magnetic stimulus is a non-invasive method for electrically stimulating the cerebral cortex applying squared pulses with certain frequency, during variable time intervals, over particular regions of the cranium. Some specific stimuli are able to depolarize neurons and produce measurable effects such that chains of these stimuli may modify the cortical excitability of both the stimulated zone and the related remote areas through functional anatomic connections. This allows an efficient tool on treating neurological and psychiatric conditions such as depression. In this work we present a novel stimulation architecture that allows localizing the magnetic field over small spatial regions such that the field amplitude is on the order of micro-Tesla, which is three orders of magnitude less than that used in the current technology. Besides localizing the stimuli, this novel architecture will help to reduce the secondary effects of the treatment due to the low field intensity.