J Korean Soc Magn Reson Med.  2011 Apr;15(1):67-71. 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

• Lee HJ
• Kim EY

• KMID: 2041229
• DOI: http://doi.org/10.13104/jksmrm.2011.15.1.67

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.

Keyword

Magnetic resonance imaging (MRI); Brain; T2 time; Amygdaloid body; Hippocampus

MeSH Terms

Amygdala
Brain
Gyrus Cinguli
Hippocampus
Relaxation

Figure

• 

  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

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