CAJ | 학술논문

针对光在高散射介质中的传播特性，研究了皮肤组织中径向漫反射强度 R（r）和纵向能量吸收强度 A（z）．利用Matlab对高散射随机皮肤组织中光子的随机运行进行蒙特卡罗模拟计算，依次改变肌肉层参数，得到三类典型参数在不同取值时的 R（r）与 A（z）．模拟结果表明，在其余参数不变，当吸收系数μα越大时，肌肉层中的能量衰减梯度越大，能量吸收强度的初值也越大，同时漫反射强度越小；当散射系数μs 越大时，能量吸收强度的初值越大，衰减梯度也越大，漫反射强度的衰减梯度几乎相同；当各项异性因子 g越大时，能量吸收强度的初值越小，即发生吸收的概率就越少，同时漫反射强度也越小；三类光学参数对 R（r）影响程度相近并且较小，在半径为0．05 cm范围内，漫反射强度均呈现出相类似的大梯度衰减．
침대광재고산사개질중적전파특성，연구료피부조직중경향만반사강도 R（r）화종향능량흡수강도 A（z）．이용Matlab대고산사수궤피부조직중광자적수궤운행진행몽특잡라모의계산，의차개변기육층삼수，득도삼류전형삼수재불동취치시적 R（r）여 A（z）．모의결과표명，재기여삼수불변，당흡수계수μα월대시，기육층중적능량쇠감제도월대，능량흡수강도적초치야월대，동시만반사강도월소；당산사계수μs 월대시，능량흡수강도적초치월대，쇠감제도야월대，만반사강도적쇠감제도궤호상동；당각항이성인자 g월대시，능량흡수강도적초치월소，즉발생흡수적개솔취월소，동시만반사강도야월소；삼류광학삼수대 R（r）영향정도상근병차교소，재반경위0．05 cm범위내，만반사강도균정현출상유사적대제도쇠감．
According to the properties of light transmission in highly scattering medium ,radial diffuse reflection intensity of R(r) and longitudinal energy absorption intensity of A (z ) in the skin tissue are discussed .Stochastic motions of a bunch of photons in the highly scattering multi-layered skin were calculated and analyzed with Monte Carlo simulation based on the Matlab software .A series of R(r) and A (z) were obtained when the three typical kinds of parameters had different values by successively changing the parameters of the muscle layer .The calculation results show that ,with the rest of the parameters unchanged the larger the absorption coefficient μs is ,the greater the gradient of energy decay and the initial value of the A(z) in the muscle layer are and the smaller the R(r) is ,with the scattering coefficient μs increasing ,the initial value of A (z ) and the gradient of energy decay in the muscle layer become stronger ,and gradients of R(r) with different μs are almost the same .The greater the anisotropy factor g in the muscle layer is ,the smaller the initial value of A(z) is ,which means that the absorption of photons hardly happens ,and the smaller R(r) is .The influences of the three types of optical parameters on R(r) are similar and weak ,and every curve of R(r) presents similar and high gradient in the range with the radius being 0 .05 cm .