Guanajuato, Gto., December 25, 2016.- Researchers of the University of Guanajuato (UG) develop materials to apply laser induced ultrasound in illnesses such as tumors, blood clots, varicose veins or cosmetic applications.

Dr. Gerardo Gutiérrez, responsible of the Laboratory of Bio-photo-acoustics of the Division of Sciences and Engineering and Dr. Bartolomé Reyes Ramírez, postdoctoral researcher, who fabricate photo-acoustic lenses with plastic and silicon with the purpose to focus the laser induced ultrasound and take advantage of this phenomenon. The lenses have that name because, different from the acoustic lenses, the ultrasound generates in themselves when inducing laser pulses in nanoseconds.

The ultrasound are mechanical waves, it means non-ionizing, whose frequency is above hearing capability of the human ear (approximately 20,000 Hz). Since the XIX century, the ultrasound has been used in the industry for the characterization of materials; and in the medicine for the diagnosis of illnesses.

Aware of its potential in treatment of illnesses, the professors of UG elaborate photo-acoustic lenses of several geometries, with the purpose to have a maximum concentration of the mechanical waves and make them influence in the region of interest.

Dr. Bartolomé Reyes Ramírez explained that with the adequate dimension of a plain convex lens, you can focus the mechanical wave in a point to concentrate the maximum energy. He added that the application possibilities are multiple, besides it is a non-harmful nor secondary effects technique.

The researcher detailed that it can eliminate tumors, for example in the head of hard access areas, break thrombus or blood clots that obstruct veins or arteries; eliminate varicose veins; restore skin; massage reestablishing good circulation. All the previous is achieved turning light pulses in mechanical waves.

He commented that, if they have had good results, they are currently seeking to work with metamaterials to increase the absorption of light and turn it into more powerful mechanical waves.

Finally, Dr. Bartolomé Reyes said that the next step is to find better results, chose the best materials to then seek a company or aid to continue the project, since it would have a strong impact on the health area.