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  7 Tesla quantitative hip MRI: a comparison between TESS and CPMG for T2 mapping

Kraff, O., Lazik-Palm, A., Heule, R., Theysohn, J., Bieri, O., & HH, Q. (2016). 7 Tesla quantitative hip MRI: a comparison between TESS and CPMG for T2 mapping. Magnetic Resonance Materials in Physics, Biology and Medicine, 29(3), 503-512. doi:10.1007/s10334-016-0557-0.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-4480-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-4481-F
Genre: Journal Article

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Kraff, O, Author
Lazik-Palm, A, Author
Heule, R1, Author              
Theysohn, JM, Author
Bieri, O, Author
HH, Quick, Author
Affiliations:
1University of Basel Hospital, ou_persistent22              

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 Abstract: Objectives We aimed to evaluate the feasibility of triple-echo steady state (TESS) T2 mapping as an alternative to conventional multi-echo-spin-echo (CPMG) T2 mapping for the quantitative assessment of hip joint cartilage at 7 T. Materials and methods A total of eight healthy volunteers and three patients were included. Reproducibility of both techniques was evaluated in five volunteers in five scans each. T2 relaxation times were measured by manually drawing regions of interest in multiple regions of the hip joint. Data from both methods were compared using Pearson correlation coefficient, intra-class correlation coefficient, and coefficient of repeatability. The overall image quality and presence of artifacts was assessed. Results Cartilage transplant and surrounding fluid were well depicted by both methods. Compared to CPMG, TESS provided systematically reduced T2 values (43.3 ± 7.3 vs. 19.2 ± 5.5 ms for acetabular cartilage, and 41.4 ± 5.6 vs. 21.7 ± 5.2 ms for femoral cartilage), in line with previously reported values. No correlation between both methods was found. TESS yielded a slightly better reproducibility than CPMG, while CPMG showed pronounced sensitivity to B1 inhomogeneities. Conclusion TESS seems to be an attractive alternative to CPMG for improvements in quantitative hip joint imaging at 7 T, allowing shortening of the total acquisition time paired with insensitivity to B1, while rendering comparable image quality with good repeatability.

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 Dates: 2016-06
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1007/s10334-016-0557-0
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Title: Magnetic Resonance Materials in Physics, Biology and Medicine
Source Genre: Journal
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Publ. Info: Amsterdam : No longer published by Elsevier
Pages: - Volume / Issue: 29 (3) Sequence Number: - Start / End Page: 503 - 512 Identifier: ISSN: 0968-5243
CoNE: https://pure.mpg.de/cone/journals/resource/954926245532