Dear experts,
I'm attempting to use the fieldmap toolbox with fieldmaps acquired from a Philips Achiever scanner. I have two magnitude images and two phase images, with echo times of 4.9 ms and 7.6 ms.
I don't get any error messages, and the toolbox seems to run through so that I get vdm files. However, the vdm, fpm and bmask images look quite strange, almost as if they are not being masked properly. I've attached the output from the fieldmap toolbox ("fieldmap_generation.pdf") as well as the original images ("fieldmap_images.pdf", with my two magnitude images on the top row, then my two phase images on the middle row, and then my mask and vdm on the bottom row).
Do these images look strange to anyone else and has anyone encountered such a problem before? I wonder if perhaps I am using the wrong magnitude images, or if I should adjust any parameters for the masking?
Many thanks,
Antoinette
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