Apollon - 22/5/12 - 09:00 - User-driven Open Innovation Ecosystems
20080125 Friday Food
1. Quantitative analysis of ultrasound images of the preterm brain Ewout Vansteenkiste IBBT-Medisip/IPI-UGENT Friday Food 25/01/2008
2. Outline [Source: William Lawson, A new Orchard and Garden , 1648, Londen ] quantitative image analysis medical ultrasound speckle-reduction in ultrasound 2D echo/3D MRI registration white matter classification 1/24 texture-classification psycho-physics segmentation registration white matter segmentation ventricle segmentation segmentation carotid
3. Quantitative image analysis 2/24 tumor = “white dot” in the image size = “small”, “average” Qualitative analysis : in words 2.25 cm² Both experts measure the tumor Using the same segmentation algorithm Quantitative analysis: through measuring
4. Medical ultrasound 3/24 SPECKLE probe electric current Pi ëzo-electric cristal pulsing Tissue structures/transitions skin
12. Outline [Source: William Lawson, A new Orchard and Garden , 1648, Londen ] Quantitative image analysis medical ultrasound Texture classification white matter classification 11/24
13. Flare segmentation and area estimation 12/24 sensitivity 98% Validation? Initial texture- Basd segmen- Tation map -Morfological closing -Gradient -Opening by Reconstruction expert existing new Expert delineation: subjective? 2D US 3D MRI registration
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15. Multimodal 2D ultrasound to 3D MRI registration initialization Mutuel Information Metric Regular Step Gradient Descent Rigid Transformation Trilinear Interpolation result 14/24