'Partial volume effects' presentation slideshows

1.28k views • 110 slides

Signal and Noise in fMRI

Signal and Noise in fMRI. fMRI Graduate Course October 16, 2002. What is signal? What is noise?. Signal, literally defined Amount of current in receiver coil What can we control? Scanner properties (e.g., field strength) Experimental task timing Subject compliance (through training)

853 views • 65 slides

Image Registration John Ashburner

Image Registration John Ashburner. Pre-processing Overview. Statistics or whatever. fMRI time-series. Template. Anatomical MRI. Smoothed. Estimate Spatial Norm. Motion Correct. Smooth. Coregister. Spatially normalised. Deformation. Contents. Preliminaries Smooth

882 views • 65 slides

Voxel-Based Morphometry with Unified Segmentation

Voxel-Based Morphometry with Unified Segmentation. Ged Ridgway Centre for Medical Image Computing University College London. Thanks to: John Ashburner and the FIL Methods Group. Preprocessing in SPM. Realignment With non-linear unwarping for EPI fMRI Slice-time correction Coregistration

1.3k views • 65 slides

Signal and Noise in fMRI John VanMeter, Ph.D. Center for Functional and Molecular Imaging Georgetown University Medical

Signal and Noise in fMRI John VanMeter, Ph.D. Center for Functional and Molecular Imaging Georgetown University Medical Center. Outline. Definition of SNR and CNR in context of anatomic imaging Definition of functional SNR Sources of noise in MRI Source of noise in fMRI

1.98k views • 50 slides

Structural Images

Structural Images. ??? Cheng- Hao Tu , PhD. Outlines. Computational Anatomy Voxel-based Morphometry (VBM) Diffusion Tensor Imaging (DTI). Aims of computational neuroanatomy. Many interesting and clinically important questions might relate to the shape or local size of regions of the brain

656 views • 45 slides