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Abstract #1775

Movement Artifacts in Monitoring the Brain Temperature During Induction of Mild Hypothermia

Jan Weis1, Lucian Covaciu2, Sten Rubertsson2, Mats Allers3, Anders Lunderquist3, Francisco Ortiz-Nieto1, Hkan Ahlstrm1

1Department of Radiology, Uppsala University Hospital, Uppsala, Sweden; 2Department of Surgical Sciences, Anesthesiology & Intensive Care, Uppsala University Hospital, Uppsala, Sweden; 3Department of Clinical Sciences, Division of Thoracic Surgry, University Hospital, Lund, Sweden

Brain temperature reductions (1-3 C) were induced by intranasal cooling. Purpose of this study was to compare MRSI with high spatial and reduced spectral resolution and phase-difference technique that were used in monitoring the brain temperature changes during cooling. Both methods were sensitive to the slight involuntary movement (rotation) of the head. Random (reversible) and systematic (irreversible) movement artifacts were observed. Measurements in the transversal slices were more robust to the movement artifacts than those in sagittal planes.