Conference Paper
Fourier transform methods applied to an optical heterodyne profilometer
Fecha
2010Autor
Tlacuilo-Parra, A.
Villela-Rodriguez, J.
Garibaldi-Covarrubias, R.
Soto-Padilla, J.
Orozco-Alcala, J.
Institución
Resumen
Background. The Functional Independence Score in Hemophilia (FISH) is a performance-based assessment tool used to measure the patients functional ability so far only used in patients with severe hemophilia. Its aim is to determine if FISH is useful in patients with mild and moderate disease. Procedure. In a cross-sectional study 90 children 60 hemophilic and 30 sex-, race-, and age-matched healthy males were assessed. Patients between 5 and 16 years of age were selected each patient was evaluated in seven activities under three categories: self-care (grooming and eating, bathing, and dressing), transfers (chair and squat), and locomotion (walking and step climbing). Each activity was graded from 1 to 4 according to the amount of assistance required to perform the activity with total scores ranging from 7 to 28. Results. As a whole, the mean age of the patients was 10.0 3.4 years with a mean FISH of 25.8 3.6 (range 15-28). There were no differences in the FISH between healthy males and patients with mild hemophilia; however, the score was significantly higher in patients with mild hemophilia (28 0) than patients with moderate (26.2 2.5; P=0.004) or severe hemophilia (24.0 4.7; P=0.0006). The most affected activities were squatting, walking, and step climbing. Conclusions. A significant decrease in functional ability was demonstrated according to the severity of hemophilia, especially for those activities involving weight-bearing demands like locomotion and step climbing. Of seven activities evaluated, changes were observed in the groupwith moderate and severe hemophilia, but no changes detected in patients with mild disease. " 2009 Wiley-Liss, Inc.",,,,,,"10.1002/pbc.22291",,,"http://hdl.handle.net/20.500.12104/41629","http://www.scopus.com/inward/record.url?eid=2-s2.0-76749104679&partnerID=40&md5=126e92e98ee68fa8dae84e4b75469e19",,,,,,"3",,"Pediatric Blood and Cancer",,"394 397",,"54",,"Scopus WOS",,,,,,"Activities; Arthropathy; Disability; Functional score; Hemophilia; Musculoskeletal",,,,,,"Functional independence score in hemophilia: A cross-sectional study assessment of Mexican children",,"Article"
"43368","123456789/35008",,"Beltrán-González, A., Departamento de Electrónica, Universidad de Guadalajara, Av. Revolución 1500, 44430 Guadalajara, Jal., Mexico; García-Torales, G., Departamento de Electrónica, Universidad de Guadalajara, Av. Revolución 1500, 44430 Guadalajara, Jal., Mexico; Martínez-Ponce, G., Centro de Investigaciones en óptica, Apdo. Postal 1-948, 37000 León-Gto., Mexico",,"Beltran-Gonzalez, A. García-Torales, G. Martinez-Ponce, G.",,"2013",,"In this work, theory and experiment describe the performance of a surface profile measurement device based on optical heterodyne interferometry are presented. The object and reference beams propagating through the interferometer are obtained by single-pass through an acousto-optic modulator. The diffraction orders 0 and the Doppler-shifted +1 (object and reference beams, respectively) are manipulated to propagate collinearly towards the interferometer output where a fast photodetector is placed to collect the irradiance. The modulated optical signal is Fourier transformed using a data acquisition card and RF communications software. The peak centered at the acousto-optic frequency in the power spectrum is filtered and averaged. The irregularities on the surface of the reflective sample are proportional to the height of this peak. The profile of a reflective blazed grating has been sketched by translating laterally the sample using a nanopositioning system. Experimental results are compared to the measurement done with a scanning electron microscope. There has been found a good agreement between both methods. " 2013 SPIE.