NEco value in "image" does not agree with the number of echoes in header and in actual acquisition. K-space data matrix does not have the "Echo" dimension

[wenshangwang]

Dear pymapvbvd team

I encountered this issue when loading up a multi-echo SE-EPI twix data. After loading the data:

twixObj.hdr.Config correctly record the "NEchoMeas" as 3. However, the actual data matrix in twixObj.image shown the NEco as only 1.

This sequence is scanned with siemens' XA30. When I loaded a previous scan using the exact same sequence on VE11. Everything is loaded and mapped correctly.

As you can see from the above two snippet of loading results, the number of acquisition are the same so there are definitely 3 echoes of data being acquired. All the other dimension are the same except for NEco. It wouldn't be surprised to me that only the last echo's data is stored as each echo probably just over-write the previous echo's data at the same position.

I would like to ask suggestion on what could be done to obtain all echoes of mine. Also, I would like to ask base on your knowledge on this siemens' upgrade, did they change any of the loop structure to multi-echo EPI's echo when writing the twix file?

Thanks in advance!