Cardiac electrophysiology procedures present the physician with a wealth of 3D information, typically presented on fixed 2D monitors. New developments in wearable mixed reality displays offer the potential to simplify and enhance 3D visualization while providing hands-free, dynamic control of... Read more

Objective: Novel applications of transcranial Doppler (TCD) ultrasonography, such as the assessment of cerebral vessel narrowing/occlusion or the non-invasive estimation of intracranial pressure (ICP), require high-quality maximal flow velocity waveforms. However, due to the low signal-to-noise ratio of TCD spectrograms,... Read more

This work presents an innovative, low-cost, easy-to-fabricate, and simple-to-use probe that can detect early-stage skin cancer. As can be seen above, the probe scans the suspected skin area to enable capturing the reflection coefficient at each position. The collected data is then processed to infer the presence of skin cancer through a differential approach. In order to do this, a novel imaging function is utilized to enable the detection of relative permittivity changes with respect to the healthy region surrounding the suspected one, resulting in the 2D image depicted above... Read more

Slender silicon-based optical probes comprising up to 20 thin-film micro light-emitting diodes (µLEDs) are realized as compact devices for optogenetic research. The μLEDs are structured on GaN-on-sapphire and transferred onto silicon using a wafer-level bonding and laser lift-off process. This technology allows processing the GaN layer stack from both sides, thereby maximizing the µLED efficiency to an emittance of 56 mWmm−2 at 5 mA. The thermal characterization of the optical probes reveals a temperature increase of up to 1.5 K. Acceptable neuronal responses are elicited at radiant flux values between 1.36 μW and 17.5 μW, successfully demonstrating layer-specific cortex stimulation... Read more