Diffuse reflection on the acupuncture point under laser acupuncture with different spatial distribution
-
1.
College of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
-
2.
Laboratory of Intelligent Systems and Control Engineering, Guilin University of Electronic Technology, Guilin 541004, China
-
Corresponding author:
QIN Jian-hua, cxyu@bupt.edu.cn
;
-
Received Date:
2010-09-03
Accepted Date:
2010-01-20
-
Abstract
In order to study the diffuse transmission influence of laser acupuncture with different surface distribution light sources,the image-point-source distribution on meridian tissue is analyzed and diffusion equation of the image-point-source is solved through the use of extrapolation boundary conditions and Green response.Diffuse output models in acupuncture region for different distribution surface light source are obtained by a series responses of virtual points source.Flat,fiber and gauss acupuncture laser are simulated by Monte-Carlo method.The results indicated that; (1) the radial light energy in three acupuncture without spot mainly was concentrated in the near light source region and coincided when the radial distance to more than 0.135 cm,and axial light energy showed a negative exponential decay in flat and gauss acupuncture and linear decline in fiber source; (2) when surface light source existed circular or ring spot,the diffuse was inversely proportional to the spot area, especially the diffuse of circular spot being larger than the ring spot under the same spot area,and diffuse reflectance curve had a significant distortion at the vertical projection and was inversely proportional to the distance outside the projection,especially when the distance to 0.5 times of the spot radius the curve distortion being basically eliminated.The results may provide a useful reference for light source selection and acupuncture location of acupuncture points.
-
-
References
|
[1]
|
WHfITAKER P.Laser acupuncture:past,present,and future[J].Lasers in Medical Science,2004,19(2):69-80. |
|
[2]
|
JOHNG H M,CHO J H,SHIN H S,et al.Frequency dependence of impedancea at the acupuncture point Quze(PC3)[J],IEEE Engineering in Medicine and Biology,2002,21(2):33-36. |
|
[3]
|
CHOI C,SOH K S.Study of propagation of light along an acupuncture meridian[J].Journal of the Optical Society of Korea,2003,7(6):244-247(in Korcan). |
|
[4]
|
McNALLY K M,SORG B S,WELCH A J,et al.Photothermal effects of laser tiasue soldering[J].Physics in Medicine & Biology,1999,44(4):983-1002. |
|
[5]
|
WANG X C,GONG Y J,SONC D C,et al.The spatially resolved scattered reflection of three layered matched media diffusion equation in the steady-state[J].Acta Photonica Sinica,2005,25(3):377-381 (in Chineae). |
|
[6]
|
KIENLE A,PATTERSON M S.Impmved solutions of the iteady-state and the time-resolved diffusion equations for reflectance from a senuinfinite turbid medium[J].Journal of the Optical Society of America,1997,A14(1):246-254. |
|
[7]
|
LAI J Ch,LI Zh H,WANG Zh D,et al.System model oflidt transporting in biological tiasues and its application[J].Acta Photonica Sinica,2007,36(7):1312-1317 (in Chineae). |
|
[8]
|
WANC Sh,RUAN J,HE Q L.Study on photo-damage selectivity in photodynamic therapy by means of Monte Carlo method[J].Laser Technology,2008,32(2):184-186 (in Chinese). |
|
[9]
|
WEI P F,ZHAO Y Q,UANG Y,et al.Monte Carlo simulations of polarized light transport in multilayered scattering media[J].Acta Photonica Sinica,2009,38(10):2634-2639 (in Chinese). |
|
[10]
|
LI Zh H,LAIJ Ch,WANG Zh D,et al.The application of impulseresponse function in Monte Cado simulation of light distribution in biological tiasues[J].Ltser Technology,2001,25 (4):263-268(in Chinese). |
|
[11]
|
DOOMBOS R M P,LANG R,ALDERS M C,et al.The determination of in vivo human tissue optical properties and absolute chromophore concentrat ions using spatially resolved steady-suue diffuse reflectance spectroscopy[J].Physics in Medicine and Biology,1999,44(3):967-981. |
-
-
Proportional views
-
Map
DownLoad: