A modified polarized Monte Carlo code is developed that allows heterogeneous structure to be modeled.
The code is validated with existent polarized Monte Carlo code. Heterogeneous structure simulating colon tissue is
simulated to understand the difference between simulations of homogeneous vs heterogeneous tissue structure.
Reflectance measurements from simulations containing increased blood vessel size and increased blood volume fraction, both markers for potential cancerous tissue, are studied in order to better interpret reflectance measurement from diagnostic probes.