Hi Nero,
It isn't clear what you mean when you wrote that "DICOM bit resolution
(12-bit) is to low give the appropriate signal intensity in SPM"
Bit resolution is a fundamental parameter of the acquisition
(specifically the analog-to-digital converter). Bit resolution affects
the "quantization noise", and while you can always scale images after
acquisition, there is no way to change the quantization noise of data
once it has already been acquired.
Assuming the gains are set appropriately during acquisition, 12 bits is
plenty for MRI.
cheers,
-MH
On Thu, 2010-12-02 at 12:20 -0800, Nero Evero wrote:
> Thank you for the suggestion, I will try it when I get the raw data.
> But is there any way to increase the bit resolution of the DICOM
> formatted data I currently have?
>
> Best regards,
> Nero
>
>
> On Tue, Nov 30, 2010 at 11:49 PM, Marko Wilke <[log in to unmask]
> tuebingen.de> wrote:
> Hi Nero,
>
> I guess what you are looking for is SPM's button labelled
> "DICOM import" :) There are also numerous other tools that
> allow converting scanner-specific or DICOM data into nifti-
> compliant format, but if you want to work with spm, I would
> try using its own import functionality first.
>
> Hope this helps,
> Marko
>
>
> Nero evero wrote:
> Hi All,
>
> I am conducting an fMRI study on a 1.5T Siemens
> Magnetom and had a
> couple of questions. Our data was collected in DICOM
> format and from
> what I have been told the DICOM bit resolution (12-
> bit) is to low give
> the appropriate signal intensity in SPM. That brings
> me to my first
> question; is there any way to increase the bit
> resolution to at least
> 16-bit for our data that is in the DICOM format?
>
> If this is not possible is there any way to take the
> raw data both
> header and image (which I have been told is an .rda
> format for Siemens)
> and convert it to nifti so it can be processed and
> analyzed in SPM8? Any
> help would be greatly appreciated.
>
> Thanks,
>
> Nero
>
>
>
> --
> ____________________________________________________
> PD Dr. med. Marko Wilke
> Facharzt für Kinder- und Jugendmedizin
> Leiter, Experimentelle Pädiatrische Neurobildgebung
> Universitäts-Kinderklinik
> Abt. III (Neuropädiatrie)
>
>
> Marko Wilke, MD, PhD
> Pediatrician
> Head, Experimental Pediatric Neuroimaging
> University Children's Hospital
> Dept. III (Pediatric Neurology)
>
>
> Hoppe-Seyler-Str. 1
> D - 72076 Tübingen, Germany
> Tel. +49 7071 29-83416
> Fax +49 7071 29-5473
> [log in to unmask]
>
> http://www.medizin.uni-tuebingen.de/kinder/epn
> ____________________________________________________
>
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