Concurrent Volume Visualization of Real-Time fMRI
2010 (English)In: Proceedings of the 8th IEEE/EG International Symposium on Volume Graphics / [ed] Ruediger Westermann and Gordon Kindlmann, Goslar, Germany: Eurographics - European Association for Computer Graphics, 2010, 53-60 p.Conference paper (Refereed)
We present a novel approach to interactive and concurrent volume visualization of functional Magnetic Resonance Imaging (fMRI). While the patient is in the scanner, data is extracted in real-time using state-of-the-art signal processing techniques. The fMRI signal is treated as light emission when rendering a patient-specific high resolution reference MRI volume, obtained at the beginning of the experiment. As a result, the brain glows and emits light from active regions. The low resolution fMRI signal is thus effectively fused with the reference brain with the current transfer function settings yielding an effective focus and context visualization. The delay from a change in the fMRI signal to the visualization is approximately 2 seconds. The advantage of our method over standard 2D slice based methods is shown in a user study. We demonstrate our technique through experiments providing interactive visualization to the fMRI operator and also to the test subject in the scanner through a head mounted display.
Place, publisher, year, edition, pages
Goslar, Germany: Eurographics - European Association for Computer Graphics, 2010. 53-60 p.
, Eurographics/IEEE VGTC Symposium on Volume Graphics, ISSN 1727-8376 ; VG10
fMRI, Direct volume rendering, Local ambient occlusion, Real-time, Biofeedback
Medical Image Processing
IdentifiersURN: urn:nbn:se:liu:diva-58060DOI: 10.2312/VG/VG10/053-060ISBN: 978-3-905674-23-1OAI: oai:DiVA.org:liu-58060DiVA: diva2:331859
8th IEEE/EG International Symposium on Volume Graphics, Norrköping, Sweden, 2-3 May, 2010