[MINC-users] retrieve coregistration

[Jérôme Redouté]

Hi Robert,
here is the output of mincinfo

> file: CHAPO06620_F15_04_DYN_avg.mnc
> image: signed__ short -32768 to 32767
> image dimensions: xspace zspace yspace
>     dimension name         length         step        start
>     --------------         ------         ----        -----
>     xspace                    176          0.6        -52.8
>     zspace                    164    -0.601562         48.3
>     yspace                    208    -0.601562      63.8531
>
>
> file: ratio_original.mnc
> image: signed__ short -32000 to 32000
> image dimensions: zspace yspace xspace
>     dimension name         length         step        start
>     --------------         ------         ----        -----
>     zspace                    164    -0.601562           -0
>     yspace                    208     0.601562     -62.2617
>     xspace                    176          0.6        -52.5

PS: imgratio is a tool from Turku's PET center

Jerome



Le 15/09/2016 à 12:23, Robert D. Vincent a écrit :
> Hi Jérôme,
>
> I don't know the "imgratio" tool, is it possible it is changing or deleting
> the voxel-to-world transform? What is the output of mincinfo on the two mnc
> files?
>
> If the basic sampling grid hasn't changed, you should be able to use
> minc_modify_header to put the original voxel-to-world transform back into
> the ratio.mnc header.
>
>      -bert
>
> On Thu, Sep 15, 2016 at 5:59 AM, Jérôme Redouté <redoute at cermep.fr> wrote:
>
>> Hi all,
>>
>> I need your help concerning a coregistration loss problem during image
>> processing.
>>
>> I have a mnc PET 4D volume that I need to process in ECAT format.
>>
>> My processing steps are as follows:
>>
>> DYN.mnc => ecat with minctoecat
>>
>> ecat processing (imgratio) to generate a ratio image => ratio.v
>>
>> convert back to minc using ecattominc => ratio.mnc
>>
>> my problem is that ratio.mnc is not in alignment with DYN.mnc
>>
>>
>> How should I correct ratio.mnc header to bring this alignment back?
>>
>> Thanks for your help
>>
>> Jerome
>>
>> --
>> ==================================================================
>> Jérôme Redouté
>> Ph.D. - Ingénieur de Recherche - Université Claude Bernard - Lyon1
>> CERMEP - Imagerie du vivant
>> 59 Bd Pinel. 69677 Bron - FRANCE
>> tel : 33 (0)4 72 68 86 18 (bureau)
>> tel : 33 (0)4 72 68 86 00 (standard)
>> fax : 33 (0)4 72 68 86 10
>> ==================================================================
>>
>>
>> _______________________________________________
>> MINC-users at bic.mni.mcgill.ca
>> http://www.bic.mni.mcgill.ca/mailman/listinfo/minc-users
>>
> _______________________________________________
> MINC-users at bic.mni.mcgill.ca
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>


-- 
==================================================================
Jérôme Redouté
Ph.D. - Ingénieur de Recherche - Université Claude Bernard - Lyon1
CERMEP - Imagerie du vivant
59 Bd Pinel. 69677 Bron - FRANCE
tel : 33 (0)4 72 68 86 18 (bureau)
tel : 33 (0)4 72 68 86 00 (standard)
fax : 33 (0)4 72 68 86 10
==================================================================