how to do slice timing?

i have segmented the area of interest form various slices of mri images, now i have to combine all the segmented slice and want to visualize it in 3d and calculate its volume.

[Walter Roberson]

I'm not sure why you refer to slice timing? Slices might be imaged at different times, but they are usually treated as if they are simultaneous, at least after motion correction is done.

[David López]

sorry Manas, how did you figure it out? I can be able to get a time slice

[Walter Roberson]

@David López

Could you expand on what you are doing?

There are multiple ways of doing MRI. In some of them, slices exist purely as a computational matter, reconstructed from measurements at different angles (similar to CT.) In other ways, it is common for slices at a time to be scanned and then move on to other slices, but there is no inherent reason that I can think of to prefer proceeding in one direction rather than another, so the process might take slices along any direction as desired (Though I vaguely remember our people telling me that more energy was required to move in one particular direction due to the way our particular MRIs were constructed.)

DICOM files seldom record information about the order slices were recorded. The technicians might log in their book which sequence they used, with different sequences recording in different orders, if you knew enough about the sequence. If I recall correctly, to achieve higher resolutions, our researchers used interleaved scans, several passes through the volume at different offsets -- so for any particular slice to know the relative time you would need to know the slice scan order.

What would you do with the information about the relative timing of a particular slice ???