Volume 72, Issue 1 pp. 149-159
Full Paper

Quantitative oxygenation venography from MRI phase

Audrey P. Fan

Corresponding Author

Audrey P. Fan

Magnetic Resonance Imaging Group, Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, USA

Address reprint requests to: Audrey Fan, S.M., 32 Vassar Street, Room 36-792, Massachusetts Institute of Technology, Cambridge, MA 02139. E-mail: [email protected]Search for more papers by this author
Berkin Bilgic

Berkin Bilgic

Magnetic Resonance Imaging Group, Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, USA

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Louis Gagnon

Louis Gagnon

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, USA

Harvard-MIT Health Sciences and Technology, Cambridge, Massachusetts, USA

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Thomas Witzel

Thomas Witzel

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, USA

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Himanshu Bhat

Himanshu Bhat

Siemens Medical Solutions USA Inc., Charlestown, Massachusetts, USA

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Bruce R. Rosen

Bruce R. Rosen

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, USA

Harvard-MIT Health Sciences and Technology, Cambridge, Massachusetts, USA

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Elfar Adalsteinsson

Elfar Adalsteinsson

Magnetic Resonance Imaging Group, Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, USA

Harvard-MIT Health Sciences and Technology, Cambridge, Massachusetts, USA

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First published: 04 September 2013
Citations: 144

Abstract

Purpose

To demonstrate acquisition and processing methods for quantitative oxygenation venograms that map in vivo oxygen saturation (SvO2) along cerebral venous vasculature.

Methods

Regularized quantitative susceptibility mapping (QSM) is used to reconstruct susceptibility values and estimate SvO2 in veins. QSM with ℓ1 and ℓ2 regularization are compared in numerical simulations of vessel structures with known magnetic susceptibility. Dual-echo, flow-compensated phase images are collected in three healthy volunteers to create QSM images. Bright veins in the susceptibility maps are vectorized and used to form a three-dimensional vascular mesh, or venogram, along which to display SvO2 values from QSM.

Results

Quantitative oxygenation venograms that map SvO2 along brain vessels of arbitrary orientation and geometry are shown in vivo. SvO2 values in major cerebral veins lie within the normal physiological range reported by 15O positron emission tomography. SvO2 from QSM is consistent with previous MR susceptometry methods for vessel segments oriented parallel to the main magnetic field. In vessel simulations, ℓ1 regularization results in less than 10% SvO2 absolute error across all vessel tilt orientations and provides more accurate SvO2 estimation than ℓ2 regularization.

Conclusion

The proposed analysis of susceptibility images enables reliable mapping of quantitative SvO2 along venograms and may facilitate clinical use of venous oxygenation imaging. Magn Reson Med 72:149–159, 2014. © 2013 Wiley Periodicals, Inc.

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