Value 4 shall be used to indicate derived pixel contrast - generally, contrast created by combining or processing images with the same geometry. Value 4 shall have a value of NONE when Value 1 is ORIGINAL.
Note: If more than one of the following derived types is applicable, then it is up to the generating application to specify the value that best characterizes the derived image.
Value 4 of Image Type (0008,0008) and Value 4 of Frame Type (0008,9007) shall not be zero length.
Table C.8-130 specifies the Defined Terms for Value 4 for Image Type (0008,0008) and Frame Type (0008,9007) that are common to CT and MR. Additional defined terms are defined in the modality-specific Module and Macro definitions.
Table C.8-130IMAGE TYPE AND FRAME TYPE VALUE 4 COMMON
|Defined Term Name||Defined Term Description|
|ADDITION||Created through Pixel by pixel addition operation|
|DIVISION||Created through Pixel by pixel division operation|
|MASKED||Created through Pixel by pixel masking operation|
|MAXIMUM||Created through Pixel by Pixel Maximum operation|
|MEAN||Created through Pixel by pixel mean operation|
|MINIMUM||Created through Pixel by Pixel Minimum operation|
|MTT||Mean Transit Time|
|MULTIPLICATION||Created through Pixel by pixel multiplication operation|
|RCBF||Regional Cerebral Blood Flow (rCBF)|
|RCBV||Regional Cerebral Blood Volume (rCBV)|
|RESAMPLED||Pixels have been spatially re-sampled, e.g., MPR|
|SUBTRACTION||Created through Pixel by pixel subtraction operation|
|TTP||Time To Peak map|
|NONE||Not a calculated image|
|MIXED||Used only as value in Image Type (0008,0008) if frames within the image SOP Instance contain different values for value 4 in their Frame Type (0008,9007) attribute.|