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Abstract #5084

Sequences for transceive phase mapping: a comparison study and application to conductivity imaging

Soraya Gavazzi1, Stefano Mandija2, Cornelis AT van den Berg1,2, Yulia Shcherbakova2, Mick Bennis3, Jan JW Lagendijk1, Lukas JA Stalpers3, Hans Crezee3, and Astrid LHMW van Lier1

1Department of Radiotherapy, University Medical Center Utrecht, Utrecht, Netherlands, 2Center for Image Sciences, University Medical Center Utrecht, Utrecht, Netherlands, 3Department of Radiation Oncology, Academic Medical Center Amsterdam, Amsterdam, Netherlands

Electrical properties imaging relies on accurate transceive phase determination. We explored the use of PLANET, an ellipse fitting approach on phase-cycled bSSFP data, for transceive phase mapping for the first time. We compared its accuracy, precision and time-efficiency with conventional SE and bSSFP techniques. Additionally, we reconstructed conductivity maps based on these techniques. We found that bSSFP and PLANET were as accurate as SE, but more precise. Also, bSSFP was the most time-efficient. Nevertheless, banding artefacts corrupting bSSFP transceive phase were, instead, intrinsically removed by PLANET. PLANET had clinically acceptable scan-time and was generally more suitable for conductivity mapping.

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