The message is saying that the DICOM files don't have the necessary
information to unambiguously convert them into NIFTI volumes. The conversion
algorithm has to make an educated guess about how to order the slices, which
appears to work OK for your data (so far).
The "Acquisition Number" is a field in the header of each of your DICOM files,
which is necessary for sorting slices into volumes. For some reason, the
acquisition sequence that you use does not include correctly setting this
field. This should be documented somewhere in
ftp://medical.nema.org/medical/dicom/2008/ . It's been a while since I
looked through the DICOM documentation, so I'm not sure which of the files
contains the relevant information.
Best regards,
-John
On Wednesday 16 July 2008 09:53, Suzuki, Yuriko wrote:
> Hello,
> I am a new user of SPM5 updates1111.
>
> When using Import DICOM tool to convert Philips fMRI DICOM data to NIfTI
> format, following message appears;
>
>
> ***************************************************
>
> * The AcquisitionNumber counter does not appear *
>
> * to be changing from one volume to another. *
>
> * Another possible explanation is that the same *
>
> * DICOM slices are used multiple times. *
>
> * The conversion is having to guess how slices *
>
> * should be arranged into volumes. *
>
> * test2 / 401 / 4
>
> ***************************************************
>
>
>
> I think AcquisitionNumber of Philips DICOM means almost same as
> SeriesNumber.
>
> One fMRI dataset has one specific AcquisitionNumber,
>
> therefore all volume from one fMRI dataset have same AcquisitionNumber...
>
> I could not find any way to avoid this message.
>
>
>
> My question is... what is " AcquisitionNumber" supposed to mean?
>
> Maybe it should be changing from one volume to another...
>
>
>
> Even this message appears, conversion seems to be OK.
>
> Actually, I checked it by scanning phantom (moving).
>
> Hopefully, system found some parameters to convert data correctly.
>
>
>
>
>
> With best regards.
>
>
>
> Yuriko
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