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Abstract #4095

Evaluation of the Liver Iron Concentration (LIC) at 3T in Comparison to 1.5T in Patients with Thalassemia and Falciforme Anemia

Thomas Martin Doring1,2, Flavia P. Junqueira3, G M. Cunha3, Antonio C. Coutinho Jr. 3, Antonio Adilton Carneiro4, Marcio Bernardes3, J L. Fernandes5, Romeu Cortes Domingues3

1Radiology, Multi-imagem, Rio de Janeiro, RJ, Brazil; 2Radiology, UFRJ - Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil; 3Radiology, CDPI, Rio de Janeiro, RJ, Brazil; 4Medical Physics, USP - Universidade de So Paulo, Ribeiro Preto, SP, Brazil; 5UNICAMP, Campinas, Brazil

Relaxometry (T2*) was performed at 3T and compared to 1.5T in establishing a relationship between the results. The liver iron concentration (LIC) at 1.5T was calculated through calibration of the MR scanner and at 3T a correction factor, extracted from the T2* relationship between the different field strengths, was applied with the goal to use the same calibration equation of the 1.5T scanner. The T2* measurements and liver iron concentrations, with the application of the correction factor, at 3T and 1.5T showed high linear relationship.