Volume 65, Issue 1 pp. 108-119
Full Paper

The effect of blood inflow and B1-field inhomogeneity on measurement of the arterial input function in axial 3D spoiled gradient echo dynamic contrast-enhanced MRI

Caleb Roberts

Caleb Roberts

Imaging Science and Biomedical Engineering, School of Cancer and Enabling Sciences, The University of Manchester, Manchester, United Kingdom

The University of Manchester Biomedical Imaging Institute, University of Manchester, Manchester, United Kingdom

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Ross Little

Ross Little

Imaging Science and Biomedical Engineering, School of Cancer and Enabling Sciences, The University of Manchester, Manchester, United Kingdom

The University of Manchester Biomedical Imaging Institute, University of Manchester, Manchester, United Kingdom

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Yvonne Watson

Yvonne Watson

Imaging Science and Biomedical Engineering, School of Cancer and Enabling Sciences, The University of Manchester, Manchester, United Kingdom

The University of Manchester Biomedical Imaging Institute, University of Manchester, Manchester, United Kingdom

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Sha Zhao

Sha Zhao

Imaging Science and Biomedical Engineering, School of Cancer and Enabling Sciences, The University of Manchester, Manchester, United Kingdom

The University of Manchester Biomedical Imaging Institute, University of Manchester, Manchester, United Kingdom

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David L. Buckley

David L. Buckley

Imaging Science and Biomedical Engineering, School of Cancer and Enabling Sciences, The University of Manchester, Manchester, United Kingdom

Division of Medical Physics, University of Leeds, Leeds, United Kingdom

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Geoff J. M. Parker

Corresponding Author

Geoff J. M. Parker

Imaging Science and Biomedical Engineering, School of Cancer and Enabling Sciences, The University of Manchester, Manchester, United Kingdom

The University of Manchester Biomedical Imaging Institute, University of Manchester, Manchester, United Kingdom

Imaging Science and Biomedical Engineering, School of Cancer and Enabling Sciences, The University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, United Kingdom===Search for more papers by this author
First published: 06 October 2010
Citations: 57

Abstract

A major potential confound in axial 3D dynamic contrast-enhanced magnetic resonance imaging studies is the blood inflow effect; therefore, the choice of slice location for arterial input function measurement within the imaging volume must be considered carefully. The objective of this study was to use computer simulations, flow phantom, and in vivo studies to describe and understand the effect of blood inflow on the measurement of the arterial input function. All experiments were done at 1.5 T using a typical 3D dynamic contrast-enhanced magnetic resonance imaging sequence, and arterial input functions were extracted for each slice in the imaging volume. We simulated a set of arterial input functions based on the same imaging parameters and accounted for blood inflow and radiofrequency field inhomogeneities. Measured arterial input functions along the vessel length from both in vivo and the flow phantom agreed with simulated arterial input functions and show large overestimations in the arterial input function in the first 30 mm of the vessel, whereas arterial input functions measured more centrally achieve accurate contrast agent concentrations. Use of inflow-affected arterial input functions in tracer kinetic modeling shows potential errors of up to 80% in tissue microvascular parameters. These errors emphasize the importance of careful placement of the arterial input function definition location to avoid the effects of blood inflow. Magn Reson Med, 2010. © 2010 Wiley-Liss, Inc.

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