Relaxation-compensated CEST (chemical exchange saturation transfer) imaging in breast cancer diagnostics at 7T
Purpose - To investigate whether fat-corrected and relaxation-compensated amide proton transfer (APT) and guanidyl CEST-MRI enables the detection of signal intensity differences between breast tumors and normal-appearing fibroglandular tissue in patients with newly-diagnosed breast cancer. - Method...
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
24 May 2020
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| In: |
European journal of radiology
Year: 2020, Volume: 129, Pages: 1-9 |
| ISSN: | 1872-7727 |
| DOI: | 10.1016/j.ejrad.2020.109068 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.ejrad.2020.109068 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0720048X20302576 
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| Author Notes: | Lisa Loi, Ferdinand Zimmermann, Steffen Goerke, Andreas Korzowski, Jan-Eric Meissner, Katerina Deike-Hofmann, Anne Stieber, Peter Bachert, Mark Edward Ladd, Heinz-Peter Schlemmer, Sebastian Bickelhaupt, Sarah Schott, Daniel Paech |
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| 245 | 1 | 0 | |a Relaxation-compensated CEST (chemical exchange saturation transfer) imaging in breast cancer diagnostics at 7T |c Lisa Loi, Ferdinand Zimmermann, Steffen Goerke, Andreas Korzowski, Jan-Eric Meissner, Katerina Deike-Hofmann, Anne Stieber, Peter Bachert, Mark Edward Ladd, Heinz-Peter Schlemmer, Sebastian Bickelhaupt, Sarah Schott, Daniel Paech |
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| 520 | |a Purpose - To investigate whether fat-corrected and relaxation-compensated amide proton transfer (APT) and guanidyl CEST-MRI enables the detection of signal intensity differences between breast tumors and normal-appearing fibroglandular tissue in patients with newly-diagnosed breast cancer. - Method - Ten patients with newly-diagnosed breast cancer and seven healthy volunteers were included in this prospective IRB-approved study. CEST-MRI was performed on a 7T-whole-body scanner followed by a multi-Lorentzian fit analysis. APT and guanidyl CEST signal intensities were quantified in the tumor and in healthy fibroglandular tissue after correction of B0/B1-field inhomogeneities, fat signal contribution, T1- and T2-relaxation; signal intensity differences of APT and guanidyl resonances were compared using Mann-Whitney-U-tests. Pearson correlations between tumor CEST signal intensities and the proliferation index Ki-67 were performed. - Results - APT CEST signal in tumor tissue (6.70±1.38%Hz) was increased compared to normal-appearing fibroglandular tissue of patients (3.56±0.54%Hz, p=0.001) and healthy volunteers (3.70±0.68%Hz, p=0.001). Further, a moderate positive correlation was found between the APT signal and the proliferation index Ki-67 (R2=0.367, r=0.606, p=0.11). Guanidyl CEST signal was also increased in tumor tissue (5.24±1.85%Hz) compared to patients’ (2.42±0.45%Hz, p=0.006) and volunteers’ (2.36±0.54%Hz, p<0.001) normal-appearing fibroglandular tissue and a positive correlation with the Ki-67 level was observed (R2=0.365, r=0.604, p=0.11). APT and guanidyl CEST signal in normal-appearing fibroglandular tissue was not different between patients and healthy volunteers (p=0.88; p=0.93). - Conclusion - Relaxation-compensated and fat-corrected CEST-MRI allowed a non-invasive differentiation of breast cancer and normal-appearing breast tissue. Thus, this approach represents a contrast agent-free method that may help to increase diagnostic accuracy in MR-mammography. | ||
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| 650 | 4 | |a APT CEST | |
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