Improved reproducibility for myocardial ASL: impact of physiological and acquisition parameters
Purpose To investigate and mitigate the influence of physiological and acquisition-related parameters on myocardial blood flow (MBF) measurements obtained with myocardial Arterial Spin Labeling (myoASL). Methods A Flow-sensitive Alternating Inversion Recovery (FAIR) myoASL sequence with bSSFP and sp...
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| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
January 2024
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| In: |
Magnetic resonance in medicine
Year: 2024, Jahrgang: 91, Heft: 1, Pages: 118-132 |
| ISSN: | 1522-2594 |
| DOI: | 10.1002/mrm.29834 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1002/mrm.29834 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.29834 
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| Verfasserangaben: | Maša Božić-Iven, Stanislas Rapacchi, Qian Tao, Iain Pierce, George Thornton, Christian Nitsche, Thomas A. Treibel, Lothar R. Schad, Sebastian Weingärtner |
MARC
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| 245 | 1 | 0 | |a Improved reproducibility for myocardial ASL |b impact of physiological and acquisition parameters |c Maša Božić-Iven, Stanislas Rapacchi, Qian Tao, Iain Pierce, George Thornton, Christian Nitsche, Thomas A. Treibel, Lothar R. Schad, Sebastian Weingärtner |
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| 520 | |a Purpose To investigate and mitigate the influence of physiological and acquisition-related parameters on myocardial blood flow (MBF) measurements obtained with myocardial Arterial Spin Labeling (myoASL). Methods A Flow-sensitive Alternating Inversion Recovery (FAIR) myoASL sequence with bSSFP and spoiled GRE (spGRE) readout is investigated for MBF quantification. Bloch-equation simulations and phantom experiments were performed to evaluate how variations in acquisition flip angle (FA), acquisition matrix size (AMS), heart rate (HR) and blood T1\ \mathrmT_1 \ relaxation time (T1,B\ \mathrmT_1,B \) affect quantification of myoASL-MBF. In vivo myoASL-images were acquired in nine healthy subjects. A corrected MBF quantification approach was proposed based on subject-specific T1,B\ \mathrmT_1,B \ values and, for spGRE imaging, subtracting an additional saturation-prepared baseline from the original baseline signal. Results Simulated and phantom experiments showed a strong dependence on AMS and FA (R2\ R^2 \>0.73), which was eliminated in simulations and alleviated in phantom experiments using the proposed saturation-baseline correction in spGRE. Only a very mild HR dependence (R2\ R^2 \>0.59) was observed which was reduced when calculating MBF with individual T1,B\ \mathrmT_1,B \. For corrected spGRE, in vivo mean global spGRE-MBF ranged from 0.54 to 2.59 mL/g/min and was in agreement with previously reported values. Compared to uncorrected spGRE, the intra-subject variability within a measurement (0.60 mL/g/min), between measurements (0.45 mL/g/min), as well as the inter-subject variability (1.29 mL/g/min) were improved by up to 40% and were comparable with conventional bSSFP. Conclusion Our results show that physiological and acquisition-related factors can lead to spurious changes in myoASL-MBF if not accounted for. Using individual T1,B\ \mathrmT_1,B \ and a saturation-baseline can reduce these variations in spGRE and improve reproducibility of FAIR-myoASL against acquisition parameters. | ||
| 650 | 4 | |a cardiac arterial spin labeling | |
| 650 | 4 | |a cardiac magnetic resonance imaging | |
| 650 | 4 | |a flow-sensitive alternating inversion recovery | |
| 650 | 4 | |a myocardial blood flow | |
| 700 | 1 | |a Rapacchi, Stanislas |e VerfasserIn |4 aut | |
| 700 | 1 | |a Tao, Qian |e VerfasserIn |4 aut | |
| 700 | 1 | |a Pierce, Iain |e VerfasserIn |4 aut | |
| 700 | 1 | |a Thornton, George |e VerfasserIn |4 aut | |
| 700 | 1 | |a Nitsche, Christian |e VerfasserIn |4 aut | |
| 700 | 1 | |a Treibel, Thomas A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Schad, Lothar R. |d 1956- |e VerfasserIn |0 (DE-588)1028817630 |0 (DE-627)731640241 |0 (DE-576)376271221 |4 aut | |
| 700 | 1 | |a Weingärtner, Sebastian |e VerfasserIn |4 aut | |
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