AD - Add images

PURPOSE

Adds two or more images or volumes together. The sum is placed in an output file.

SEE ALSO

AS R	[Average images - find & save variance, better]
PA	[Patch image into a larger existing image/volume]
AD S	[Add Series of images]

USAGE

.OPERATION: AD

.INPUT FILE: PIC001
[Enter the name of the first file to be added. (Header positions from this file are transferred to output.)]

.NEXT INPUT FILE: PIC002
[Enter the name of the next file to be added. Can be same as first input file.]

.OUTPUT FILE: PIC999
[Enter the name of the output file. Can be same as either input file]

The system continues:

.NEXT INPUT FILE: PIC003
[Enter the name of the third file to be added.]

'AD' will continue in this manner until an asterisk ('*') is given as the name of the next input file.

NOTES

1. 'AD' only works for files with the same dimensions. To add files of different dimensions, use PATCH (see 'PA').

2. For adding an entire file series, is is more practical to use operation 'AS R'. This will also produce a variance map.

3. For use in a proceedure you can use the following set of operations:

    
            BL       ; create blank output file 
            jnk999   ; output file name 
            64 64    ; dimensions of output file (same as input) 
            N        ; do not use average 
            0.0      ; image value 
            Do LB1 x11=1,4 
               AD          ; add files operation  
               jnk{***x11} ; input file 
               jnk999      ; second input file  
               jnk999      ; output file 
               *           ; put asterick here  
            LB1 
            

SUBROUTINES

ADD

CALLER

UTIL2