Hello Everyone,

I was able to run HAMMER on a pair of my images. At the end of the registration, the warped, original subject image looked very funky while the warped, segmented subject image was matched to the target image. When I looked in the log file, I found the following message:

2008.20.29 11:20:13
Command: performdeformationusingvectorfield /raid/home/vidyaraj/MultipleReg/HammerTest/AnthrSrc_2Trg_2Jak_seg.img.Field.1.img.Mdl2Subj /raid/home/vidyaraj/MultipleReg/HammerTest/IntermResults/Trial4/hammertemp771780236/AnthrSrc_2Trg_2Jak_seg.img.rig /raid/home/vidyaraj/MultipleReg/HammerTest/AnthrSrc_2Trg_2Jak_seg.img.Warped.SubjSeg.img -s256 -v256 -I ExecPath: /raid/home/vidyaraj/MultipleReg/HammerTest/IntermResults/Trial4/hammertemp771780236
2008.20.29 11:20:54
No head in vector field file!


^^^^ Original object image input!
image size: image_size=256 z_size=198
given: Last_image_size=256 Last_z_size=198
vector field size: image_size=256 z_size=198
INTERPOLATE=0

2008.20.29 11:20:54
Command: performdeformationusingvectorfield /raid/home/vidyaraj/MultipleReg/HammerTest/AnthrSrc_2Trg_2Jak_seg.img.Field.1.img.Mdl2Subj /raid/home/vidyaraj/MultipleReg/HammerTest/IntermResults/Trial4/hammertemp771780236/AnthrSrc_2Trg_2Jak_Scaled.img.rig /raid/home/vidyaraj/MultipleReg/HammerTest/AnthrSrc_2Trg_2Jak_seg.img.Warped.SubjOrig.img -s256 -v256 ExecPath: /raid/home/vidyaraj/MultipleReg/HammerTest/IntermResults/Trial4/hammertemp771780236
2008.21.29 11:21:02
No head in vector field file!

Does this mean the complete deformation field is not being written out?

Vidya Rajagoapalan

No, this message simply means that the deformation field does not
contain description information at the beginning of the file.

That is, some deformation fields embed information, such as sizes etc,
at the beginning of the file.

In the case of hammer this is not needed and thus the deformation field
does not contain that information.=20

The command is just reporting that.

As for your images, please verify that your images all have the same x
and y sizes, all are unsigned char, and segmented with the same values.

Cheers,

Andres

Andres,

How can I make my registration results better. In the sense how will the optional parameters affect the output of HAMMER? Can you explain the relationship between some of the parameters in detail please.

Thank you.
Vidya