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Voxel localized spectrum
Metabolic imageMorphological image
Pixel profile
Nosologic image
ClassificationColor codeOverview
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When entering the software…
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For raw processing:
a set of default parameters is
proposed
Depending on the echo-time
(136 or 272 ms)
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During the raw processing, information is displayed for the successive steps
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The morphological image and a spectrum (real for 136 ms, magn for 272ms TE) are displayed
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Next step is constructing the Metabolic images from the area of each peak
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Default parameters are proposed for the line fitting
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Spectra from the voxels in and around the VOI are then fitted
Constraints:- negative peaks for lactate and alanine- same linewidth
To add:- chemical shift constraints
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All metabolic images are reconstructedThe clinician may visualize the different metabolic images to control the fitting process
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For each voxel, the fitted spectrum can be overplot on the raw data
Erroneous fitting can be corrected, voxel by voxel
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Next step is constructing the Nosologic image
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What next ?
◊ Classification process (metabolites at 136 ms TE + water information) In progress - by Isabel Brito
◊ Improve pre-processing HLSVD Remove artefact from deconvolution process Baseline correction
◊ C-programming + Java interface In progress - by Blandine Chanteloup
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The metabolic images are interpolated
The user has to draw an ROI in the healthy tissue on the water T2
image
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From the 6 metabolic maps and the water information,
a profile is calculated for each pixel
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The nosologic image is computed and displayed
For each pixel, the highest belonging degree is color encoded
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Data may be printed, saved, or the clinician may load a new patient exam
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The default morphological image may be changed…
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Information is available on the different step results