The program optimizes HDR dwell times using regularized least squares (Tikhonov regularization) or non-negative least squares. The regularization
paramater is a positive number λ If set to -1, the program uses NNLS instead of Tikhonov method. The
isodose lines in the xy, yz, and xz planes at specified plane using TG43 source model for Elekta Microselectron HDR Ir-192 sources.
Enter sources in the following sample format
1 0 -20 0
1 0 -10 0
1 0 0 0
1 0 10 0
1 0 20 0
The 1st column is the
catheter number, followed by x,y,z coordinates of the source.
Enter dose points in the following sample format
-20 -20 0 600
-20 -10 0 600
-20 0 0 600
-20 10 0 600
-20 20 0 600
for dose of 600 cGy at points (-20,-20 0) etc.
The isodose lines are plotted in the x-y plane, but if you want to display other planes, you can rotate the sources
about an arbitrary axis specified by the (ux,uy,uz) unit axis vector and the rotation angle in degrees.
Normalization is done with respect to the original coordinates system.