If it is absolutely essential, I could go and find out the details of
those subjects from one of our ancient record books. They were
healthy subjects. If I remember correctly, we didn't have ethics
permission to PET scan women of child-bearing age, so the subjects
were probably male. I'm not sure of their ages.
The intensities don't actually reflect CBF parameters as we did not
measure arterial input functions or anything like that. Intensity
scaling is arbitrary.
Best regards,
-John
On 11 January 2012 17:45, Hasan, Khader M <[log in to unmask]> wrote:
> I have two questions in regards to the SPM PET template:
>
> 1. What are the basic demographics (ages, gender, handedness,..) of the "healthy" subjects used in building the PET template provided in SPM2. I assume this template is identical to the template provided in SPM8 with the info provided below, but I still could not find the ages or gender of these numbered subjects. I am assuming they are all healthy controls?
>
> 2. What are the physical units of the data "uint8" content in PET.img, is there any scaling factor (CBF?)
>
> Thanks, Khader
>
> templates/PET.nii
> % -----------------
> % Average of images from 12 subjects spatially normalised to ICBM.
> % Images were first registered to the T1-weighted MR images, and
> % spatially transformed using the same transformation. Images were
> % acquired on a Siemens ECAT HR+ at the FIL, using Oxygen-15
> % labelled water. Averaged images smoothed using 8mm FWHM Gaussian.
> % Subject numbers: 617 622 627 630 639 662 817 824 825 826 827 828.
>
> Khader M Hasan, PhD
> Associate Professor of Radiology
> MSE 168, Tel 713 500 7690 (FAX 713 500 7684)
> University of Texas Health Science Center at Houston
> Medical School
> Diagnostic and Interventional Imaging
> Magnetic Resonance Imaging Research Division
> Diffusion Tensor Imaging Lab, Tel 713 500 7683
> http://www.uth.tmc.edu/radiology/faculty/khader-m-hasan/index.html<http://www.uth.tmc.edu/radiology/faculty/hasan.html>
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