T2 Relaxation Times of the Cingulate Cortex, Amygdaloid Body, Hippocampal Body, and Insular Cortex: Comparison of 1.5 T and 3.0 T

Ho-Joon Lee; Eung Yeop Kim

doi:10.13104/jksmrm.2011.15.1.67

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Lee and Kim: T2 Relaxation Times of the Cingulate Cortex, Amygdaloid Body, Hippocampal Body, and Insular Cortex: Comparison of 1.5 T and 3.0 T

Original Article

Journal of the Korean Society of Magnetic Resonance in Medicine

Journal of the Korean Society of Magnetic Resonance in Medicine 2011; 15(1): 67-71.

Published online: 30 April 2011

DOI: https://doi.org/10.13104/jksmrm.2011.15.1.67

T2 Relaxation Times of the Cingulate Cortex, Amygdaloid Body, Hippocampal Body, and Insular Cortex: Comparison of 1.5 T and 3.0 T

Ho-Joon Lee, Eung Yeop Kim

Department of Radiology, Research Institute of Radiologic Science, Yonsei University College of Medicine, Korea.

Address reprint requests to: Eung Yeop Kim, M.D., Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, 250, Seongsan-ro, Seodaemun-gu, Seoul 120-752, Korea. Tel. 82-2-2228-7400, Fax. 82-2-393-3035, eungykim@yuhs.ac

Received 19 January 2011 Revised 3 March 2011 Accepted 7 March 2011

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

To compare T2 relaxation times (T2) in the cingulate cortex, amygdaloid body, hippocampal body, and insular cortex between 1.5T and 3.0T MR imagers.

Materials and Methods

Twelve healthy volunteers underwent FLAIR and CPMG imaging perpendicular to the hippocampal body at both 3.0T and 1.5T. T2 was measured in the cingulate cortex, amygdaloid body, hippocampal body, and insular cortex. The T2 relaxation time ratios of the cingulate cortex, insular cortex, and amygdaloid body to the hippocampal body were compared between 1.5T and 3.0T.

Results

The mean T2 of the cingulate cortex, amygdaloid body, hippocampal body, and insular cortex at 1.5T were 109.5±3.1, 117.0±7.1, 114.7±2.4, and 111.3±2.4, respectively; 99.7±3.8, 100.7±4.3, 97.9±3.4, and 96.2±2.0, respectively, at 3.0T. Percentage changes of T2 in the cingulate cortex, insular cortex, amygdaloid body, and hippocampal body at 3.0T with respect to those at 1.5T were -8.9%, -13.5%, -14.6%, and -13.5%, respectively. The mean T2 ratios of the cingulate gyrus, insular cortex, and amygdaloid body to the hippocampal body at 1.5T and 3.0T were 0.96 and 1.02 (p=0.003); 1.02 and 1.03 (p>0.05); 0.97 and 0.98 (p>0.05), respectively.

Conclusion

T2 decrease in the cingulate cortex was less than the amygdaloid body, insular cortex, and hippocampal body at 3.0T. The mean T2 ratio of the cingulate gyrus to the hippocampal body was significantly different between 1.5T and 3.0T.

Keywords: Magnetic resonance imaging (MRI), Brain, T2 time, Amygdaloid body, Hippocampus

Figures and Tables

Fig. 1

Representative Images of FLAIR and T2 Relaxation Time Maps at 1.5T and 3.0T (FLAIR, fluid-attenuated inversion recovery; T2, T2 relaxation time maps).

Fig. 2

Regions of Interests

Table 1

T2 Relaxation Time Measured at 1.5 T and 3.0 T

^*p=0.006

Table 2

T2 Relaxation Time Ratios of the Cingulate Cortex, Insular Cortex and Amygdaloid Body to the Hippocampal Body

^*p=0.003

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