MCML is a Monte Carlo simulation program for Multi-layered Turbid
Media with an infinitely narrow photon beam as the light source. The
simulation is specified by an input text file called, for example,
"sample.mci", which can be modified by any simple text editor. The
output is another text file called, for example, "sample.mco". (The
names are arbitrary.)

CONV is a convolution program which uses the MCML output file to
convolve for photon beams of any size in a Gaussian or flat
field shape. CONV can provide a variety of output formats (reflectance,
transmission, iso-fluence contours, etc.), which are compatible with
standard graphics applications.