| genre | Image |
| status | stable |
| author | Holger Bourquain |
| package | MeVisLab/Standard |
| dll | MLBasicModules |
| definition | mlBasicModules.def |
| see also | Threshold, IntervalThreshold |
| keywords | removes, removing, replaces, arithmetic, negatives, voxels |
The module DiscardNegative replaces negative image values by 0.
GE CT Scanner set voxels outside the field of view (FOV) to -2000 (i.e. -3024 Hounsfield Units), to mark them as invalid.