image_channel_order for Ultrasound image

Hi all,
i wanna to creat a image memory object for ultrasound image (post-processed, stored in frames). Which kind of image_channel_order should i use? CL_INTENSITY or CL_LUNINANCE or what else?. Thanks

I believe the meaning is the same as in OpenGL, so maybe this posts helps to find an answer:
http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=161204#Post161204

In short, use luminance (as you don’t need alpha).

Thank you!!!