If non-zero, then mask subtraction may occur, as specified (in order of preference) by:

• A Presentation State
• The mask sequence (0028,6100) within the image
• The MaskFrame property.

If 0, then no mask subtraction occurs, even if specified in one of these three ways.

The default value is 1 (allow subtraction if specified elsewhere)

Note:   This property was previously incorrectly documented as specifying the frame to be subtracted (hence why it is an integer not a Boolean), but this was never implemented, and it has only ever functioned as a switch.  To specify a frame directly, use the MaskFrame property.

DicomImage Object  | DicomImage Members