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The reproducibility of cardiac and liver T2* measurement in thalassemia major using two different software packages

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Abstract

In b-thalassemia major (TM) multiple blood transfusions are needed for survival. As a consequence these patients present iron overload in different organs, including heart and liver. Magnetic resonance imaging using a bright blood gradient echo sequence has been successfully used for the quantification of tissue iron. The aim is to evaluate of the accuracy and precision in the evaluation of liver and myocardial T2* values in TM using two different analytical software solutions. Thirty TM patients aged 20–56 years (mean age 37, 11M/19F) were scanned in a GE 1.5 T CVI system. Each scan included the measurement of heart and liver T2* and the left ventricular ejection fraction using standard techniques. The analysis of T2* of heart and liver was done using the two different analytical software solutions: the “Functool” protocol by GE and the T2* module of QMassMR v7.4 by Medis medical imaging systems bv, Leiden, The Netherlands. The cardiac and liver T2* measurements showed that both software solutions allow reproducible measurements with low intra-observer variations (accuracy < 0.3 ms, precision < 2 ms). There is a small but significant difference between the two solutions of 2.4 ms in cardiac and of 1.5 ms in liver measurements. However, from the clinical point of view these differences (<2 ms) are small with negligible impact on the patient’s treatment management. The comparison of the T2* measurements using the two analytical software solutions proved that both techniques enable reproducible measurements for the evaluation of iron overload in heart and liver.

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Conflict of interest

Kees van Wijk is employed by Medis medical imaging systems bv. Johan H.C. Reiber is the CEO of Medis medical imaging systems bv, and has a part time appointment at the LUMC as Prof of Medical Imaging. Sophie Mavrogeni, Konstantinos Bratis, Louisa Kyrou and Antonios Kattamis declare that they have no conflict of interest.

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Authors and Affiliations

  1. Onassis Cardiac Surgery Center, Athens, Greece

    Sophie Mavrogeni & Konstantinos Bratis

  2. Medis Medical Imaging Systems BV, P.O. Box 384, 2300 AJ, Leiden, The Netherlands

    Kees van Wijk

  3. Bioiatriki MRI Unit, Athens, Greece

    Louisa Kyrou

  4. Aghia Sophia Children’s Hospital, Athens, Greece

    Antonios Kattamis

  5. Division of Image Processing, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands

    Johan H. C. Reiber

Authors
  1. Sophie Mavrogeni
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  2. Konstantinos Bratis
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  3. Kees van Wijk
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  4. Louisa Kyrou
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  5. Antonios Kattamis
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  6. Johan H. C. Reiber
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Correspondence to Kees van Wijk.

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Mavrogeni, S., Bratis, K., van Wijk, K. et al. The reproducibility of cardiac and liver T2* measurement in thalassemia major using two different software packages. Int J Cardiovasc Imaging 29, 1511–1516 (2013). https://doi.org/10.1007/s10554-013-0242-6

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  • DOI: https://doi.org/10.1007/s10554-013-0242-6

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