https://scholar.dgist.ac.kr/handle/20.500.11750/13574 2026-04-22T09:45:33Z 2026-04-22T09:45:33Z Yeo, Chaebeom Lee, Kijoon Song, Cheol https://scholar.dgist.ac.kr/handle/20.500.11750/59006 2025-09-01T10:40:11Z 2017-09-27T15:00:00Z

Title: Diffuse speckle contrast analysis for deep tissue flow monitoring Author(s): Yeo, Chaebeom; Lee, Kijoon; Song, Cheol Abstract: Recently, diffuse speckle contrast analysis (DSCA) system has been reported as novel flowmetry by demonstrating in-vivo blood flow monitoring. The DSCA has been studied as a deep tissue flowmetry with merits such as easy signal analysis, short acquisition time, and an economic and simple implementation. This talk presents various biomedical applications of the DSCA system. The applications include in-vivo arm-cuff protocol, chick embryo monitoring during entire incubation period, and blood flow monitoring in medicine. Also, its broad applicability as a flowmetry could be expanded into a stroke rat brain monitoring.

2017-09-27T15:00:00Z Park, Jae Yoon Choi, Gisoon Kim, Jae Min Yang, Ji Hye Youn, Cha Kyung Kang, Sang-Mi Na, Chang-Su Lee, Kijoon https://scholar.dgist.ac.kr/handle/20.500.11750/57703 2025-07-25T03:31:22Z 2023-11-23T15:00:00Z

Title: Low frequency oscillation(LFO) study of local microcirculation during acupuncture treatment of osteoarthritis in rats Author(s): Park, Jae Yoon; Choi, Gisoon; Kim, Jae Min; Yang, Ji Hye; Youn, Cha Kyung; Kang, Sang-Mi; Na, Chang-Su; Lee, Kijoon Abstract: Blood flow, especially microcirculation is very important indicator of body health because it provides cells with nutrients and oxygen. Traditional Chinese Medicine(TCM) claims when qi(氣) flows well throughout our body, our body is healthy. Because of these characteristics, we consider that the microcirculation can serve as a surrogate marker for qi(氣). Diffuse Speckle Contrast Analysis(DSCA) is a technology that has been in the spotlight for non-invasively measuring blood flow[1]. Recently, there is a trial to graft mutimode fiber onto DSCA[2]. we borrow this idea. we have succeeded in increasing data processing speed and increasing the number of channels at our in-house DSCA system. We present correlation between low frequency oscillation(LFO) of microcirculation and osteoarthritis treatment effect following to acupoint stimulation. We conducted experiments using rats. The rats were divided into three groups in total: a normal group, an induced group, and a treatment group. The induction group and treatment group received an MIA injection in their left knees to cause inflammation. The treatment group is divided into groups treated with laser acupuncture and patch-type micro-needles. The treatment areas are Yangneungcheon(陽陵泉,양릉천,GB34) and Xuanzhong(懸鍾,현종,GB39). Acupuncture treatment was performed for 4 weeks, and BFI was measured a total of 4 times. For the measurement conditions of MMF-DSCA, the exposure time was set to 2ms, and a 7-channel detector was created using fan-out bundle fiber. 4 out of 7 channels were used. The laser wavelength used as the source is 785nm.

2023-11-23T15:00:00Z Seong, Myeongsu Phillips, Zephaniah Mai, Phuong M. Yeo, Chae Beom Song, Cheol Lee, Kijoon Kim, Jae G. https://scholar.dgist.ac.kr/handle/20.500.11750/3688 2025-07-24T07:24:47Z 2015-02-24T15:00:00Z

Title: A fiber optic probe coupled low-cost CMOS-camera-based system for simultaneous measurement of oxy-, deoxyhemoglobin, and blood flow Author(s): Seong, Myeongsu; Phillips, Zephaniah; Mai, Phuong M.; Yeo, Chae Beom; Song, Cheol; Lee, Kijoon; Kim, Jae G. Abstract: Appropriate oxygen supply and blood flow are important in coordination of body functions and maintaining a life. To measure both oxygen supply and blood flow simultaneously, we developed a system that combined near-infrared spectroscopy (NIRS) and diffuse speckle contrast analysis (DSCA). Our system is more cost effective and compact than such combined systems as diffuse correlation spectroscopy(DCS)-NIRS or DCS flow oximeter, and also offers the same quantitative information. In this article, we present the configuration of DSCA-NIRS and preliminary data from an arm cuff occlusion and a repeated gripping exercise. With further investigation, we believe that DSCA-NIRS can be a useful tool for the field of neuroscience, muscle physiology and metabolic diseases such as diabetes. © 2015 SPIE.

2015-02-24T15:00:00Z