CONV - CONVOLUTION FOR RESPONSES TO A FINITE DIAMETER PHOTON-BEAM INCIDENT ON MULTILAYERED TISSUES

A convolution program (CONV) solving responses to a collimated finite diameter photon beam perpendicularly incident on a multi-layered tissu e has been coded in ANSI Standard C, hence, the program can be execute d on various computers. The program, employing an extended trapezoidal rule for integration, convolves the responses to an infinitely narrow photon beam computed by a companion program (MCML). Dynamic data allo cation is used for CONV as well as MCML, therefore, the number of tiss ue layers and grid elements of the grid system can be varied at run ti me. The potential error due to not scoring the first photon-tissue int eractions separately is illustrated, The program, including the source code, has been in the public domain since 1992 and can be downloaded from the web site at http://biomed.tamu.edu/similar to 1w. (C) 1997 El sevier Science Ireland Ltd.