10/10/2023
By Lynne Schaufenbil
Title: Tailored Photoacoustic Apertures with Superimposed Optical Holograms
Abstract: Ultrasound has been an invaluable tool for medical imaging for decades, and the properties of which have been studied extensively. However, even as enlightening as the modality has proven to be, there exist numerous limitations such as the static configuration and number of transducer elements and operator nuances leading to potentially inaccurate or inconsistent measurements. Photoacoustics introduces an optical-to-acoustic process regarding the generation of the ultrasound pulse which enjoys some flexibility not seen in traditional ultrasonics. This talk will detail the initial development of an all-optical, photoacoustic ultrasound instrument which uses time-delayed optical holograms to `construct’ phase delays in the photoacoustic aperture. Particular focus will be given to the optical modeling and wavefront propagation simulation methods employed during development, culminating with experimental validation of the proof of concept.
Bio: Glenn Howe is a Postdoctoral Research Associate in the Department of Bioengineering at Imperial College London. He obtained his PhD in Physics from the University of Massachusetts Lowell in 2020. His research interests include developing and deploying optical instrumentation spanning numerous scientific disciplines including lidar development, image analysis for astronomical telescopes, and innovative medical imaging instrumentation.
RSVP to Lynne_Schaufenbil@uml.edu if you are interested in attending.