/Get-Packages /Format: Displays information about all packages in the image. Use the /Format option to specify a table or ...

/Get-Packages [/Format:]

  Displays information about all packages in the image.  Use the /Format option
  to specify a table or list format for the output.  If /Format is not
  specified, the output is formatted as a list. 

    Examples:
      DISM.exe /Image:C:	est\offline /Get-Packages
      DISM.exe /Format:Table /Image:C:	est\offline /Get-Packages
      DISM.exe /Format:List /English /Image:C:	est\offline /Get-Packages