Término solicitado: LEW, SERGIO E./(22)
4 Registro/s encontrado/s en CAT+NORMA
| Tipo de Docum.: | documento de conferencia |
| Título: | Neuromodulación transcraneal por ultrasonido pulsado : nuevo enfoque para tratamiento de trastornos neurológicos |
| Autor: | Acquaticci, Fabián; Gwirc, Sergio N.; Lew, Sergio E. |
| Reunión: | Instituto Nacional de Tecnología Industrial. INTI. Argentina, TecnoINTI edición 2017. Jornadas Abiertas de Desarrollo, Innovación y Transferencia Tecnológica, 13, Buenos Aires. AR, 2017 |
| Idioma: | spa |
| Datos de Edición: | Buenos Aires. AR. INTI. 2017. |
| Pág./Vol.: | 2p. |
| Unidad técnica: | INTI-Electrónica e Informática. |
| Descriptores: | Sistema nervioso; Cráneo; Ultrasonido |
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Trabajo de INTI |
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| Tipo de Docum.: | artículo |
| Título: | Ultrasound axicon: systematic approach to optimize focusing resolution through human skull bone |
| Autor: | Acquaticci, Fabián; Lew, Sergio E.; Gwirc, Sergio N. |
| Título Ser./Col.: | Materials, 12(20) |
| Autor Inst. Ser./Col.: | Multidisciplinary Digital Publishing Institute. MDPI. Basilea. Suiza |
| Idioma: | eng |
| Datos de Edición: | s.l. MDPI. 2019. |
| Pág./Vol.: | 17p. |
| Descriptores: | Ultrasonido; Cráneo |
| Resumen: | The use of axicon lenses is useful in many high-resolution-focused ultrasound applications, such as mapping, detection, and have recently been extended to ultrasonic brain therapies. However, in order to achieve high spatial resolution with an axicon lens, it is necessary to adjust the separation, called stand-off (δ), between a conventional transducer and the lens attached to it. Comprehensive ultrasound simulations, using the open-source k-Wave toolbox, were performed for an axicon lens attached to a piezo-disc type transducer with a radius of 14 mm, and a frequency of about 0.5 MHz, that is within the range of optimal frequencies for transcranial transmission. The materials properties were measured, and the lens geometry was modelled. Hydrophone measurements were performed through a human skull phantom. We obtained an initial easygoing design model for the lens angle and optimal stand-off using relatively simple formulas. The skull is not an obstacle for focusing of ultrasound with optimized axicon lenses that achieve an identical resolution to spherical transducers, but with the advantage that the focusing distance is shortened. An adequate stand-off improves the lateral resolution of the acoustic beam by approximately 50%. The approach proposed provides an effective way of designing polydimethylsiloxane (PDMS)-based axicon lenses equipped transducers |
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Trabajo de INTI |
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URL: |
https://www.mdpi.com/1996-1944/12/20/3433 |
| Tipo de Docum.: | artículo |
| Título: | A polydimethylsiloxane-based axicon lens for focused ultrasonic brain stimulation techniques |
| Autor: | Acquaticci, Fabián; Guarracino, Juan F.; Gwirc, Sergio N.; Lew, Sergio E. |
| Título Ser./Col.: | Acoustical Science and Technology, 40(2) |
| Autor Inst. Ser./Col.: | The Acoustical Society of Japan. ASJ. Japón |
| Idioma: | eng |
| Datos de Edición: | s.l. ASJ. 2019. |
| Pág./Vol.: | p. 116-126. |
| Descriptores: | Lentes; Ultrasonido; Sistema nervioso |
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Trabajo de INTI |
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URL: |
https://www.jstage.jst.go.jp/article/ast/40/2/40_E1847/_article |
| Tipo de Docum.: | artículo |
| Título: | Rapid prototyping of pyramidal structured absorbers for ultrasounds |
| Autor: | Acquaticci, Fabián; Yommi, Maximiliano M.; Gwirc, Sergio N.; Lew, Sergio E. |
| Título Ser./Col.: | Open Journal of Acoustics, 2017, n. 7 |
| Idioma: | eng |
| Datos de Edición: | 2017. |
| Pág./Vol.: | p. 83-93. |
| Unidad técnica: | INTI-Laboratorio de Transductores Piezoeléctricos. |
| Descriptores: | Ultrasonido; Acústica; Absorción sonora; Ensayos ultrasónicos; Ondas ultrasónicas; Viscoelastícidad; Prototipos; Frecuencia |
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Trabajo de INTI |
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