Wearable photoacoustic watch for humans

Zhang, Ting1; Guo, Heng1; Qi, Weizhi1; Xi, Lei1,2

2024-03-15

10.1364/OL.514238

OPTICS LETTERS   影响因子和分区

0146-9592

1539-4794

Longitudinal detection of hemodynamic changes based on wearable devices is imperative for monitoring human healthcare. Photoacoustic effect is extremely sensitive to variations in hemoglobin. Therefore, wearable photoacoustic devices are apt to monitor human healthcare via the observation of hemodynamics. However, the bulky system and difficulties in miniaturizing and optimizing the imaging interface restrict the development of wearable photoacoustic devices for human use. In this study, we developed a wearable photoacoustic watch with a fully integrated system in a backpack that has a size of 450 mm x 300 mm x 200 mm and an affordable weight of 7 kg for an adult to wear. The watch has a size of 43 mm x 30 mm x 24 mm, weighs 40 g, and features a lateral resolution of 8.7 mu m, a field of view (FOV) of 3 mm in diameter, and a motorized adjustable focus for optimizing the imaging plane for different individuals. We recruited volunteers to wear the watch and the backpack and performed in vivo imaging of the vasculatures inside human wrists under the conditions of walking and human cuff occlusion to observe hemodynamic variations during different physiological states. The results suggest that the focus shifting capability of the watch makes it suitable for different individuals, and the compact and stable design of the entire system allows free movements of humans. (c) 2024 Optica Publishing Group

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China["62022037","62305148","62105140","61775028","81571722","61528401"] ; Guangdong Sci- ence and Technology Department["2019ZT08Y191","2022B1212010003"] ; Shenzhen Science and Technology Innovation Program["JCYJ20230807093105010","JCYJ20200109141222892","KQTD201909291 72743294","RCBS202110706092213005"] ; Southern University of Science and Technology[PDJH2021C008]

Optics

Optics

WOS:001222336500008

Optica Publishing Group

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Dept Biomed Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Adv Biomat, Shenzhen 518055, Guangdong, Peoples R China

Zhang, Ting,Guo, Heng,Qi, Weizhi,et al. Wearable photoacoustic watch for humans[J]. OPTICS LETTERS,2024,49(6).

Zhang, Ting,Guo, Heng,Qi, Weizhi,&Xi, Lei.(2024).Wearable photoacoustic watch for humans.OPTICS LETTERS,49(6).

Zhang, Ting,et al."Wearable photoacoustic watch for humans".OPTICS LETTERS 49.6(2024).