Fully wireless pressure sensor based on endoscopy images

Abstract

In this paper, the result of developing a fully wireless pressure sensor based on endoscopy images for an endoscopic surgery is reported for the first time. The sensor device has structural color with a nm-scale narrow gap, and the gap is changed by air pressure. The structural color of the sensor is acquired from camera images. Pressure detection can be realized with existing endoscope configurations only. The inner air pressure of the human body should be measured under flexible-endoscope operation using the sensor. Air pressure monitoring, has two important purposes. The first is to quantitatively measure tumor size under a constant air pressure for treatment selection. The second purpose is to prevent the endangerment of a patient due to over transmission of air. The developed sensor was evaluated, and the detection principle based on only endoscopy images has been successfully demonstrated.

Influence of Undoped‐AlGaN Final Barrier of MQWs on the Performance of Lateral‐Type UVB LEDs

“…This was calibrated to measure the luminous flux for accurate values of light output power measurement. [32,33] The performances (I-Ls and I-EQEs) of all Lat-UVB LED devices were evaluated at RT under continuous-wave (cw)-operation using p-type electrodes with chip size area of 0.35 Â 0.35 mm 2 on bare-wafer level condition.…”

“…[7,8,42] Therefore, further improvement in the Lat-UVB LEDs is expected, by using flip-chip technology, PhC in p-AlGaN (p-GaN), polarization doping, and lens-like packaging. [32,33,[41][42][43] Last but not the least, the ultimate goal is to develop NB-UVB LED light sources, which are strongly needed for the specific realworld applications, such as those in immunotherapy, for vulgaris treatment, and plant lightning. [1][2][3][4][5][6]8] A small part of the NB-UVB spectrum can be used to treat skin conditions such as psoriasis and eczema.…”