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Stephan E. Maier, MD, PhD

Associate Professor, Department of Radiology, Harvard Medical School

Associate Professor, Radiology, Brigham And Women's Hospital

Contact Info

Stephan Maier
Brigham And Women's Hospital
75 Francis St
Boston, MA, 02115
Mailstop: Thorn 317
Phone: 617-732-5065
Fax: 617-264-5275


Not Available.

DF/HCC Program Affiliation

Cancer Imaging

Research Abstract

At Brigham and Women's Hospital we discovered and developed a new magnetic resonance (MR)
diffusion imaging technique called Line Scan Diffusion Imaging (LSDI), which can be implemented
on conventional MR hardware. By measuring the directional dependence of diffusion, we have been
able to produce images which show the white matter fiber tracts of the brain in great detail. We have
used fiber mapping to visualize and quantify the development of fiber tracts in neonates and the
destruction of fiber tracts by brain tumors. In human diffusion brain scans we found that, with higher
diffusion weighting than usual, signal attenuation is described better with a biexponential model, rather
than the commonly used monoexponential model. Our initial findings indicate that maps generated
from data of such biexponential fits, are useful for the differentiation and delineation of normal, edematous,
and tumorous tissue without contrast agents and thus, may provide additional information not accessible
with conventional MR contrast agents.


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