## Manual Fine-Tuning Iterations

These are the starting conditions of the Calibrate Manually tab following simulated annealing of the radionuclide source strength distribution in the Surface Measurements tab.

Begin by adjusting the **Dose Calibration** slider until the dose profile curve passes through the 5 mm measurement point.

By inspection, adjust the **Crossover**, **Nearfield slope** and other **Nearfield** sliders to make the dose profile curve a smooth fit to the nearfield points (range 0 to 2 mm).

By inspection, adjust the **Farfield power** and **Farfield threshold** sliders until the dose profile curve passes through the farfield points (range 7 to 10 mm).

- Next, adjust the
**Crossover**field to minimize the RMS error in the range 0..5 mm. - Next, adjust the
**Nearfield slope**field to minimize the RMS error in the range 0..5 mm. - Next, adjust the
**Anisotropy shift**field to minimize the RMS error in the range 0..5 mm. - Next, adjust the
**Anisotropy threshold**field to minimize the RMS error in the range 0..5 mm. - Next, adjust the
**Farfield power**field to minimize the RMS error in the range 0..10 mm. - Next, adjust the
**Farfield threshold**field to minimize the RMS error in the range 0..10 mm. - Next, adjust the
**Dose Calibration**field to minimize the RMS error in the range 0..5 mm.

Repeat steps 2-8 above until the RMS error over the range 0..10 mm can no longer be reduced. The bumper buttons change the parameter value by increments of .001. Use the bumpers to fine tune the fit when the slider increments become ineffective.

Optionally, return to the surface measurements tab and re-solve using the current starting parameters (i.e. do NOT click the distribute uniformly button, just click the solve button, and then repeat the manual fine tuning process). A second annealing can occasionally improve the surface and axis curve fit by a fraction of a %.