Repeatability of magnetic resonance fingerprinting T1 and T2 estimates assessed using the ISMRM/NIST MRI system phantom
Purpose The purpose of this study was to evaluate accuracy and repeatability of T1 and T2 estimates of a MR fingerprinting (MRF) method using the ISMRM/NIST MRI system phantom. Methods The ISMRM/NIST MRI system phantom contains multiple compartments with standardized T1, T2, and proton density value...
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| Published in: | Magnetic resonance in medicine Vol. 78; no. 4; pp. 1452 - 1457 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
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| ISSN: | 0740-3194, 1522-2594, 1522-2594 |
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| Abstract | Purpose
The purpose of this study was to evaluate accuracy and repeatability of T1 and T2 estimates of a MR fingerprinting (MRF) method using the ISMRM/NIST MRI system phantom.
Methods
The ISMRM/NIST MRI system phantom contains multiple compartments with standardized T1, T2, and proton density values. Conventional inversion‐recovery spin echo and spin echo methods were used to characterize the T1 and T2 values in the phantom. The phantom was scanned using the MRF‐FISP method over 34 consecutive days. The mean T1 and T2 values were compared with the values from the spin echo methods. The repeatability was characterized as the coefficient of variation of the measurements over 34 days.
Results
T1 and T2 values from MRF‐FISP over 34 days showed a strong linear correlation with the measurements from the spin echo methods (R2 = 0.999 for T1; R2 = 0.996 for T2). The MRF estimates over the wide ranges of T1 and T2 values have less than 5% variation, except for the shortest T2 relaxation times where the method still maintains less than 8% variation.
Conclusion
MRF measurements of T1 and T2 are highly repeatable over time and across wide ranges of T1 and T2 values. Magn Reson Med 78:1452–1457, 2017. © 2016 International Society for Magnetic Resonance in Medicine. |
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| AbstractList | The purpose of this study was to evaluate accuracy and repeatability of T1 and T2 estimates of a MR fingerprinting (MRF) method using the ISMRM/NIST MRI system phantom.PURPOSEThe purpose of this study was to evaluate accuracy and repeatability of T1 and T2 estimates of a MR fingerprinting (MRF) method using the ISMRM/NIST MRI system phantom.The ISMRM/NIST MRI system phantom contains multiple compartments with standardized T1 , T2 , and proton density values. Conventional inversion-recovery spin echo and spin echo methods were used to characterize the T1 and T2 values in the phantom. The phantom was scanned using the MRF-FISP method over 34 consecutive days. The mean T1 and T2 values were compared with the values from the spin echo methods. The repeatability was characterized as the coefficient of variation of the measurements over 34 days.METHODSThe ISMRM/NIST MRI system phantom contains multiple compartments with standardized T1 , T2 , and proton density values. Conventional inversion-recovery spin echo and spin echo methods were used to characterize the T1 and T2 values in the phantom. The phantom was scanned using the MRF-FISP method over 34 consecutive days. The mean T1 and T2 values were compared with the values from the spin echo methods. The repeatability was characterized as the coefficient of variation of the measurements over 34 days.T1 and T2 values from MRF-FISP over 34 days showed a strong linear correlation with the measurements from the spin echo methods (R2 = 0.999 for T1 ; R2 = 0.996 for T2 ). The MRF estimates over the wide ranges of T1 and T2 values have less than 5% variation, except for the shortest T2 relaxation times where the method still maintains less than 8% variation.RESULTST1 and T2 values from MRF-FISP over 34 days showed a strong linear correlation with the measurements from the spin echo methods (R2 = 0.999 for T1 ; R2 = 0.996 for T2 ). The MRF estimates over the wide ranges of T1 and T2 values have less than 5% variation, except for the shortest T2 relaxation times where the method still maintains less than 8% variation.MRF measurements of T1 and T2 are highly repeatable over time and across wide ranges of T1 and T2 values. Magn Reson Med 78:1452-1457, 2017. © 2016 International Society for Magnetic Resonance in Medicine.CONCLUSIONMRF measurements of T1 and T2 are highly repeatable over time and across wide ranges of T1 and T2 values. Magn Reson Med 78:1452-1457, 2017. © 2016 International Society for Magnetic Resonance in Medicine. Purpose The purpose of this study was to evaluate accuracy and repeatability of T1 and T2 estimates of a MR fingerprinting (MRF) method using the ISMRM/NIST MRI system phantom. Methods The ISMRM/NIST MRI system phantom contains multiple compartments with standardized T1, T2, and proton density values. Conventional inversion-recovery spin echo and spin echo methods were used to characterize the T1 and T2 values in the phantom. The phantom was scanned using the MRF-FISP method over 34 consecutive days. The mean T1 and T2 values were compared with the values from the spin echo methods. The repeatability was characterized as the coefficient of variation of the measurements over 34 days. Results T1 and T2 values from MRF-FISP over 34 days showed a strong linear correlation with the measurements from the spin echo methods (R2=0.999 for T1; R2=0.996 for T2). The MRF estimates over the wide ranges of T1 and T2 values have less than 5% variation, except for the shortest T2 relaxation times where the method still maintains less than 8% variation. Conclusion MRF measurements of T1 and T2 are highly repeatable over time and across wide ranges of T1 and T2 values. Magn Reson Med 78:1452-1457, 2017. © 2016 International Society for Magnetic Resonance in Medicine. Purpose The purpose of this study was to evaluate accuracy and repeatability of T1 and T2 estimates of a MR fingerprinting (MRF) method using the ISMRM/NIST MRI system phantom. Methods The ISMRM/NIST MRI system phantom contains multiple compartments with standardized T1, T2, and proton density values. Conventional inversion‐recovery spin echo and spin echo methods were used to characterize the T1 and T2 values in the phantom. The phantom was scanned using the MRF‐FISP method over 34 consecutive days. The mean T1 and T2 values were compared with the values from the spin echo methods. The repeatability was characterized as the coefficient of variation of the measurements over 34 days. Results T1 and T2 values from MRF‐FISP over 34 days showed a strong linear correlation with the measurements from the spin echo methods (R2 = 0.999 for T1; R2 = 0.996 for T2). The MRF estimates over the wide ranges of T1 and T2 values have less than 5% variation, except for the shortest T2 relaxation times where the method still maintains less than 8% variation. Conclusion MRF measurements of T1 and T2 are highly repeatable over time and across wide ranges of T1 and T2 values. Magn Reson Med 78:1452–1457, 2017. © 2016 International Society for Magnetic Resonance in Medicine. |
| Author | Ma, Dan Keenan, Kathryn E. Jiang, Yun Gulani, Vikas Stupic, Karl F. Griswold, Mark A. |
| AuthorAffiliation | 1 Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, United States 3 Physical Measurement Laboratory, National Institute of Standards and Technology, Boulder, Colorado, United States 2 Department of Radiology, Case Western Reserve University, Cleveland, Ohio, United States |
| AuthorAffiliation_xml | – name: 3 Physical Measurement Laboratory, National Institute of Standards and Technology, Boulder, Colorado, United States – name: 1 Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, United States – name: 2 Department of Radiology, Case Western Reserve University, Cleveland, Ohio, United States |
| Author_xml | – sequence: 1 givenname: Yun surname: Jiang fullname: Jiang, Yun organization: Case Western Reserve University – sequence: 2 givenname: Dan surname: Ma fullname: Ma, Dan organization: Case Western Reserve University – sequence: 3 givenname: Kathryn E. surname: Keenan fullname: Keenan, Kathryn E. organization: National Institute of Standards and Technology – sequence: 4 givenname: Karl F. surname: Stupic fullname: Stupic, Karl F. organization: National Institute of Standards and Technology – sequence: 5 givenname: Vikas surname: Gulani fullname: Gulani, Vikas organization: Case Western Reserve University – sequence: 6 givenname: Mark A. surname: Griswold fullname: Griswold, Mark A. email: mark.griswold@case.edu organization: Case Western Reserve University |
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| SubjectTerms | Coefficient of variation Compartments Correlation analysis Estimates Fingerprinting Magnetic resonance imaging Methods MR fingerprinting NIST system phantom Proton density (concentration) quantitative imaging relaxation time repeatability Reproducibility |
| Title | Repeatability of magnetic resonance fingerprinting T1 and T2 estimates assessed using the ISMRM/NIST MRI system phantom |
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