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The effect of haemosiderosis and blood transfusions on the T2 relaxation time and 1/T2 relaxation rate of liver tissue

S Salo, MD 1 A Alanen, MD 1 R Leino, MD 2 S Bondestam, MD 3 and M Komu, PhD 1

Departments of 1Diagnostic Radiology and 2Medicine, Turku University, FIN 20520 Turku and 3Department of Diagnostic Radiology, Helsinki University Central Hospital, FIN 00290 Helsinki, Finland



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  		Figure 1. The T2 relaxation time of the liver does not change significantly with age. Correlation between T2 relaxation time and age is -0.090.

 


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  		Figure 2. The T2 relaxation time decreases when the number of blood transfusions (NBT) increases.

 


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  		Figure 3. The 1/T2 relaxation rate increases when the number of blood transfusions (NBT) increases. The best correlation between 1/T2 and NBT was found when the NBT was less than 60. Linear regression (—) with 95% confidence interval (- - -) is represented when NBT <60.

 




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