The **3D Dose Matrix** menu is accessed from the Plaque Menu of the Plaque Window. Each plaque maintains a 3D dose matrix consisting of a set of nonuniformly distributed calculation points in which the point density is greatest near the plaque surface.

**Lowest Resolution**- 41 x 41 x 41 points. Fastest to calculate.**Medium Resolution**- 61 x 61 x 61 points. Usually adequate.**Higher Resolution**- 71 x 71 x 71 points. Slowest to calculate.