No.
Am 16.09.2010 23:34, schrieb Xu, Ben (NIH/NINDS) [E]:
> Thank you very much, Micheal. That's really helpful.
>
> For the magnitude image, does it matter whether the one with short or long TE?
>
> Ben
>
> -----Original Message-----
> From: Michael Erb [mailto:[log in to unmask]]
> Sent: Thursday, September 16, 2010 9:29 AM
> To: Xu, Ben (NIH/NINDS) [E]
> Cc: [log in to unmask]
> Subject: Re: [SPM] field map from Siemens Verio 3T
>
> Hi Ben,
>
> if you search for "fieldmap siemens" in the SPM mail archives, you will find helpful informations. e.g. in
> https://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=SPM;7bf4ac9d.05
>
> So the first series contains the two magnitude images and the second series contains the phase difference image. Therefore you have to select the option Presubtracted Phase and Magnitude Data and select the one of the magnitude images and the phase difference image.
> The prescaling mentioned in the mail above is now included in the toolbox.
>
> Hope it helps,
>
> Michael.
>
> Am 16.09.2010 03:05, schrieb Xu, Ben (NIH/NINDS) [E]:
>> Hi,
>>
>> I'm new to fieldmaps for EPI distortion correction. I used Siemens (Verio 3T) fieldmap sequence (with 2 TEs: short and long) and got two sets of images from one scan, but haven't been able to get an answer for what they are. Does anybody know what these two sets of images are? Are they phase, magnitude, real, imaginary, or precalculated fieldmap in Hz? And how should I use them with the Fieldmap option in SPM8?
>>
>> Thank you very much for your help.
>>
>> Ben
>>
>
> --
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> Dr. Michael Erb
> Sektion f. experimentelle Kernspinresonanz des ZNS Abteilung Neuroradiologie, Universitaetsklinikum Hoppe-Seyler_Str. 3, D-72076 Tuebingen
> Tel.: +49(0)7071/2987753 priv. +49(0)7071/61559
> Fax.: +49(0)7071/294371
> e-mail:<[log in to unmask]>
> www: http://www.medizin.uni-tuebingen.de/nrad/sektion/
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>
--
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Dr. Michael Erb
Sektion f. experimentelle Kernspinresonanz des ZNS
Abteilung Neuroradiologie, Universitaetsklinikum
Hoppe-Seyler_Str. 3, D-72076 Tuebingen
Tel.: +49(0)7071/2987753 priv. +49(0)7071/61559
Fax.: +49(0)7071/294371
e-mail: <[log in to unmask]>
www: http://www.medizin.uni-tuebingen.de/nrad/sektion/
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