I apologize for the delay in reporting this, but I heard about/attended three great medical visualization PhD defenses late 2014:

1. Dr. Mathias Goldau successfully defended his PhD at the University of Leipzig. His thesis is entitled ‘Multi-modal and Slice-based Visualizations of Diffusion Tractography Data’ and you may or may not already be familiar with his work on OpenWalnut, an open source tool for multi-modal medical and brain data visualization. The full text of the thesis can be downloaded here or take a look at his publications here.
2. Dr. Peter Kok successfully defended his PhD at the Technical University of Delft. In his thesis, ‘Integrative Visualization of Whole Body Molecular Imaging Data‘, Dr. Kok present methods to map molecular imaging data to a common reference frame, to combine multiple modalities and to compare scans taken at different timepoints. The full text of the thesis is available here.
   

   Dr. Kok with his paranymphs and the thesis committee members. tblr: Jos Roerdink, Elmar Eisemann, Charl Botha, Erik Jansen, Boudewijn Lelieveldt, beadle Rina Abbriata, Louise van der Weerd, Bernhard Preim, Noeska Smit, Peter Kok, Thomas Kroes and the head of the committee.

3. On the same day, Dr. Stef Busking successfully defended his PhD at the Technical University of Delft as well. His thesis, ‘Visualization of Variation and Variability‘ deals with comparative visualization as a means to analyze variation or variability based on two or more specific instances of the data. The full text of the thesis is available here.

Congratulations to all three doctors!