About aligned MRI and CT image.

[JalexDooo]

HI,

I did not find CT images in ADNI dataset (DTI, MRI, PET, fMRI. but not CT), how can i get the aligned MRI and CT images.

In http://adni.loni.usc.edu/methods/documents/

" 1)The brain dataset was acquired from 16 subjects with both MRI and CT scans in the Alzheimer’s Disease Neuroimaging Initiative (ADNI) database (see www.adniinfo.org for details). The MR images were acquired using a Siemens Triotim scanner, with the voxel size 1.2 × 1.2 ×1mm3 , TE 2.95 ms, TR 2300 ms, and flip angle 9◦. The CT images, with the voxel size 0.59 × 0.59 × 3 mm3 , were acquired on a Siemens Somatom scanner. A typical example of preprocessed CT and MR images is given in Fig. 1.

2) Our pelvic dataset consists of 22 subjects, each with MR and CT images. The spacings of CT and MR images are1.172×1.172×1mm3 and1×1×1mm3,respectively. In the training stage, we rigidly align the CT to MRI with FLIRT for each subject [49]. "

Thanks.

[ginobilinie]

Hi, pelvic dataset is our in-house dataset. The brain MRI/CT is from ADNI. I donot quite remember how we collect the data (brain data), but I'm sure they are from ADNI (I remember we have some special access to the ADNI set).