definecommon_air

• purpose
• usage
• examples
• comments
• error messages
• see also

Purpose:

This program will take a series of .air files that share a common standard file and will define new .air files with a new standard file that defines the "average" position, size and shape of the various reslice files.

Usage:

definecommon_air input-prefix input-suffix output-prefix output-suffix overwrite?(y/n) id1 [..idN]

where the following definitions apply:

input-prefix

a prefix that will be common to all of the input .air file names--use "null" if you don't want a prefix

input-suffix

a suffix that will be common to all of the input .air file names--use "null" if you don't want a suffix

output-prefix

a prefix that will be common to all of the output .air file names--use "null" if you don't want an output prefix

output-suffix

a suffix that will be common to all of the output .air file names--use "null" if you don't want an output suffix

overwrite?(y/n)

'y' if you want preexisting output files with the same names as the current output files to be overwritten

id1

unique identifier that appears in between the prefix and suffix

..idN

additional unique identifiers

Examples:

• This command will average the six .air files mri1.airmri1 mri2.airmri1 mri3.airmri1 mri4.airmri1 mri5.airmri1 and mri6.airmri1. Six .air files will be generated: mri1.aircommon, mri2.aircommon, mri3.aircommon, mri4.aircommon, mri5.aircommon, and mri6.aircommon.

Comments:

• The output of this program is no longer dependent on the order in which the .air files are listed. The average position is now rigorously defined using the matrix logarithm.
• If you want to average a series of .air files that all have the same reslice file instead of all having the same standard file, invert all of the file using invert_air, apply this program to the results, and then invert the output of this program.

Error messages: (alphabetical by case)

See also:

• reconcile_air