[Forschungsseminar-BSV] UPDATE: Forschungsseminar Computergrafik, Bildverarbeitung und Visualisierung

[Patrick Oesterling]

Terminänderung:

Das Forschungsseminar nächste Woche beginnt etwas verzögert erst um 
14.00 Uhr und wird bis ca. 15.00 Uhr gehen.




On 11/27/2014 11:32 AM, Patrick Oesterling wrote:
> E I N L A D U N G
>
> zum Forschungsseminar 'Computergrafik, Bildverarbeitung und 
> Visualisierung' am Mittwoch, den 03. Dezember 2014, 13:15 Uhr, Raum 
> P-701 im Paulinum am Augustusplatz.
>
>
> Wir hören einen Vortrag auf Deutsch von:
>
>
> Christian Lucas
> Universität Leipzig
>
> über seine Masterarbeit mit dem Titel
>
> "Expectation Maximization for Probabilistic Segmentation"
>
>
> zum Inhalt:
>
> Atlas-based probabilistic classification is a proven method for organ 
> segmentation in medical images. A recent approach includes coarse 
> positioning and deformable registration of organ regions. However, the 
> atlas-based classification does not adapt sufficiently to individual 
> patient data.
>
> This work investigates a patient-specific classification via 
> expectation maximization to improve the segmentation. Estimation of 
> the organ gray value distribution and location probability is iterated 
> with optimization of the registration parameters.
>
> The algorithm has been implemented in Bash and Python scripting 
> language. It is evaluated on 297 CT images from different institutions 
> and scanners on five organ groups, including lungs, heart, liver, 
> spleen, kidneys, bladder, prostate, rectum, and femoral heads.
>
> The method performs well on organs with distinctive gray value 
> distribution, e.g. lungs, liver, or spleen (mean DICE coefficient >= 
> 0.85). The expectation maximization step improves segmentation results 
> from the previous atlas steps. Organs with a widespread gray value 
> range, two peaks in their gray value distribution, or similar 
> structures in their spatial vicinity, e.g. as for femoral heads, 
> cannot be sufficiently segmented with the current implementation.
>
>
>
> Alle Interessierten sind im Namen von Professor Dr. Scheuermann 
> herzlich eingeladen.
>
> Mit freundlichen Grüßen,
> Patrick Oesterling
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