Single photon counting system for biomedical applications was designed and tested. Examination ofchanges ofan optical signal on a patient's head during stimulation tests (finger taping) was made by the elaborated system.

The paper presents the use of the Monte Carlo method to determine the optical parameters of tissue from steady-state diffuse reflectance measurements.

A Simple Method of Determining the Effective Attenuation Coefficient This paper presents a simple method of determining the effective attenuation coefficient from steady-state diffuse reflectance measurements.

Time Correlated Single Photon Counting System for Optical MeasurementsThe high sensitivity time correlated single photon counting system (with photomultiplier tube) for biomedical measurements was designed and tested. Photon time of flight through a parafine wax phantom was modeled by Monte Carlo simulation and next measured by the device. Mean time delay introduced by a phantom is in a good agreement with simulation results. The results presented in this paper demonstrate the feasibility of measuring the optical response with the device.