Quality Improvements Quality Improvements for Multi-Modal for Multi-Modal Neuroimaging Neuroimaging Mika Seppä Mika Seppä Brain Research Unit / LTL Brain Research Unit / LTL AMI-Centre AMI-Centre Helsinki University of Helsinki University of Technology Technology
Quality Improvements for Multi-Modal Neuroimaging. Mika Seppä Brain Research Unit / LTL AMI-Centre Helsinki University of Technology. 3 central stages:. 1. Registration. 2. Resampling. 3. Visualization. 1. Registration. Match metric Single-modal registration sum of squared differences - PowerPoint PPT Presentation
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Very common operationVery common operation– geom. correction, motion correction, group geom. correction, motion correction, group
average etc.average etc.
15 xSNR = 10*log10(s2/e2)
...
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Two-stage resamplingTwo-stage resamplingSN
R (d
B)
Time (ms)
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3. Visualization3. Visualization
0.1-5 fps
800 fps
120 fps
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MS/2007
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Seppä (2007). On continuous sampling and sub-Seppä (2007). On continuous sampling and sub-sample accuracy in mutual-information registration. sample accuracy in mutual-information registration.
TKK ReportTKK Report, TKK-KYL-017., TKK-KYL-017.
Seppä (2007). High-quality two-stage resampling for 3-Seppä (2007). High-quality two-stage resampling for 3-D volumes in medical imaging. D volumes in medical imaging. Medical Image Medical Image
AnalysisAnalysis, 11:346-360., 11:346-360.
Seppä, Hämäläinen (2005). Visualizing human brain Seppä, Hämäläinen (2005). Visualizing human brain surface from T1-weighted MR images using texture-surface from T1-weighted MR images using texture-
Hiltunen, Suortti, Arvela, Seppä, Joensuu, Hari (2005). Hiltunen, Suortti, Arvela, Seppä, Joensuu, Hari (2005). Diffusion tensor imaging and tractography of distal Diffusion tensor imaging and tractography of distal peripheral nerves at 3 T. peripheral nerves at 3 T. Clinical NeurophysiologyClinical Neurophysiology, ,