Accelerated 3D‐GRASE imaging improves quantitative multiple post labeling delay arterial spin labeling

Purpose To investigate the impact of accelerated, single‐shot 3D‐GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single post‐labeling delay (PLD) in terms of perfusion‐weighted SNR per unit scan time (TSNRPW) and quantification accuracy. Methods Five subjects were sc...

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Published in:	Magnetic resonance in medicine Vol. 80; no. 6; pp. 2475 - 2484
Main Authors:	Boland, Markus, Stirnberg, Rüdiger, Pracht, Eberhard D., Kramme, Johanna, Viviani, Roberto, Stingl, Julia, Stöcker, Tony
Format:	Journal Article
Language:	English
Published:	United States Wiley Subscription Services, Inc 01.12.2018
Subjects:	3D‐GRASE Acceleration Blood flow Blurring Cerebral blood flow Delay Imaging Labeling Magnetic resonance imaging multiple post labeling delay Perfusion Programmable logic controllers pseudo‐continuous arterial spin labeling Sampling Shot single‐shot Spin labeling Substantia alba Substantia grisea Time measurement Transit time Uncertainty 3D-GRASE cerebral blood flow single-shot multiple post labeling delay perfusion pseudo-continuous arterial spin labeling
ISSN:	0740-3194, 1522-2594, 1522-2594
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Abstract	Purpose To investigate the impact of accelerated, single‐shot 3D‐GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single post‐labeling delay (PLD) in terms of perfusion‐weighted SNR per unit scan time (TSNRPW) and quantification accuracy. Methods Five subjects were scanned on a 3T MRI scanner using the pseudo‐continuous arterial spin labeling (PCASL) technique with a 3D‐GRASE imaging sequence capable of parallel imaging acceleration. A 3‐inversion pulse background suppression was simulated and implemented in the sequence. Three time‐matched single PLD measurements, a segmented one without acceleration, 1 with conventional GRAPPA, and 1 with CAIPIRINHA sampling, were used to compare TSNRPW. Three time‐matched multiple PLD measurements with the identical imaging parameters were additionally evaluated (no acceleration vs. CAIPIRINHA sampling vs. CAIPIRINHA sampling with doubled number of PLDs). Cerebral blood flow and arterial transit time fit uncertainties were compared and used as a quality measure. Results The single PLD measurements show an 11% TSNRPW increase using CAIPIRINHA sampling instead of GRAPPA sampling, while the non‐accelerated scan exhibits 35% higher TSNRPW compared to the GRAPPA scan. However, taking advantage of the increased number of averages for multiple PLD acquisitions, a 14%/16% (gray matter) and 34%/36% (white matter) reduction of CBF fit uncertainty is observed with CAIPIRINHA sampling (6 PLDs/12 PLDs) compared to no acceleration. Conclusion Accelerated single‐shot 3D‐GRASE with PCASL allows for smaller quantification uncertainties than time‐matched segmented acquisitions. Corresponding single‐shot acquisitions with acceptable blurring and no intra‐volume motion render state‐of‐the‐art ASL methods in a clinically feasible time possible.
AbstractList	Purpose To investigate the impact of accelerated, single‐shot 3D‐GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single post‐labeling delay (PLD) in terms of perfusion‐weighted SNR per unit scan time (TSNRPW) and quantification accuracy. Methods Five subjects were scanned on a 3T MRI scanner using the pseudo‐continuous arterial spin labeling (PCASL) technique with a 3D‐GRASE imaging sequence capable of parallel imaging acceleration. A 3‐inversion pulse background suppression was simulated and implemented in the sequence. Three time‐matched single PLD measurements, a segmented one without acceleration, 1 with conventional GRAPPA, and 1 with CAIPIRINHA sampling, were used to compare TSNRPW. Three time‐matched multiple PLD measurements with the identical imaging parameters were additionally evaluated (no acceleration vs. CAIPIRINHA sampling vs. CAIPIRINHA sampling with doubled number of PLDs). Cerebral blood flow and arterial transit time fit uncertainties were compared and used as a quality measure. Results The single PLD measurements show an 11% TSNRPW increase using CAIPIRINHA sampling instead of GRAPPA sampling, while the non‐accelerated scan exhibits 35% higher TSNRPW compared to the GRAPPA scan. However, taking advantage of the increased number of averages for multiple PLD acquisitions, a 14%/16% (gray matter) and 34%/36% (white matter) reduction of CBF fit uncertainty is observed with CAIPIRINHA sampling (6 PLDs/12 PLDs) compared to no acceleration. Conclusion Accelerated single‐shot 3D‐GRASE with PCASL allows for smaller quantification uncertainties than time‐matched segmented acquisitions. Corresponding single‐shot acquisitions with acceptable blurring and no intra‐volume motion render state‐of‐the‐art ASL methods in a clinically feasible time possible. PurposeTo investigate the impact of accelerated, single‐shot 3D‐GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single post‐labeling delay (PLD) in terms of perfusion‐weighted SNR per unit scan time (TSNRPW) and quantification accuracy.MethodsFive subjects were scanned on a 3T MRI scanner using the pseudo‐continuous arterial spin labeling (PCASL) technique with a 3D‐GRASE imaging sequence capable of parallel imaging acceleration. A 3‐inversion pulse background suppression was simulated and implemented in the sequence. Three time‐matched single PLD measurements, a segmented one without acceleration, 1 with conventional GRAPPA, and 1 with CAIPIRINHA sampling, were used to compare TSNRPW. Three time‐matched multiple PLD measurements with the identical imaging parameters were additionally evaluated (no acceleration vs. CAIPIRINHA sampling vs. CAIPIRINHA sampling with doubled number of PLDs). Cerebral blood flow and arterial transit time fit uncertainties were compared and used as a quality measure.ResultsThe single PLD measurements show an 11% TSNRPW increase using CAIPIRINHA sampling instead of GRAPPA sampling, while the non‐accelerated scan exhibits 35% higher TSNRPW compared to the GRAPPA scan. However, taking advantage of the increased number of averages for multiple PLD acquisitions, a 14%/16% (gray matter) and 34%/36% (white matter) reduction of CBF fit uncertainty is observed with CAIPIRINHA sampling (6 PLDs/12 PLDs) compared to no acceleration.ConclusionAccelerated single‐shot 3D‐GRASE with PCASL allows for smaller quantification uncertainties than time‐matched segmented acquisitions. Corresponding single‐shot acquisitions with acceptable blurring and no intra‐volume motion render state‐of‐the‐art ASL methods in a clinically feasible time possible. To investigate the impact of accelerated, single-shot 3D-GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single post-labeling delay (PLD) in terms of perfusion-weighted SNR per unit scan time (TSNR ) and quantification accuracy. Five subjects were scanned on a 3T MRI scanner using the pseudo-continuous arterial spin labeling (PCASL) technique with a 3D-GRASE imaging sequence capable of parallel imaging acceleration. A 3-inversion pulse background suppression was simulated and implemented in the sequence. Three time-matched single PLD measurements, a segmented one without acceleration, 1 with conventional GRAPPA, and 1 with CAIPIRINHA sampling, were used to compare TSNR . Three time-matched multiple PLD measurements with the identical imaging parameters were additionally evaluated (no acceleration vs. CAIPIRINHA sampling vs. CAIPIRINHA sampling with doubled number of PLDs). Cerebral blood flow and arterial transit time fit uncertainties were compared and used as a quality measure. The single PLD measurements show an 11% TSNR increase using CAIPIRINHA sampling instead of GRAPPA sampling, while the non-accelerated scan exhibits 35% higher TSNR compared to the GRAPPA scan. However, taking advantage of the increased number of averages for multiple PLD acquisitions, a 14%/16% (gray matter) and 34%/36% (white matter) reduction of CBF fit uncertainty is observed with CAIPIRINHA sampling (6 PLDs/12 PLDs) compared to no acceleration. Accelerated single-shot 3D-GRASE with PCASL allows for smaller quantification uncertainties than time-matched segmented acquisitions. Corresponding single-shot acquisitions with acceptable blurring and no intra-volume motion render state-of-the-art ASL methods in a clinically feasible time possible. To investigate the impact of accelerated, single-shot 3D-GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single post-labeling delay (PLD) in terms of perfusion-weighted SNR per unit scan time (TSNRPW ) and quantification accuracy.PURPOSETo investigate the impact of accelerated, single-shot 3D-GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single post-labeling delay (PLD) in terms of perfusion-weighted SNR per unit scan time (TSNRPW ) and quantification accuracy.Five subjects were scanned on a 3T MRI scanner using the pseudo-continuous arterial spin labeling (PCASL) technique with a 3D-GRASE imaging sequence capable of parallel imaging acceleration. A 3-inversion pulse background suppression was simulated and implemented in the sequence. Three time-matched single PLD measurements, a segmented one without acceleration, 1 with conventional GRAPPA, and 1 with CAIPIRINHA sampling, were used to compare TSNRPW . Three time-matched multiple PLD measurements with the identical imaging parameters were additionally evaluated (no acceleration vs. CAIPIRINHA sampling vs. CAIPIRINHA sampling with doubled number of PLDs). Cerebral blood flow and arterial transit time fit uncertainties were compared and used as a quality measure.METHODSFive subjects were scanned on a 3T MRI scanner using the pseudo-continuous arterial spin labeling (PCASL) technique with a 3D-GRASE imaging sequence capable of parallel imaging acceleration. A 3-inversion pulse background suppression was simulated and implemented in the sequence. Three time-matched single PLD measurements, a segmented one without acceleration, 1 with conventional GRAPPA, and 1 with CAIPIRINHA sampling, were used to compare TSNRPW . Three time-matched multiple PLD measurements with the identical imaging parameters were additionally evaluated (no acceleration vs. CAIPIRINHA sampling vs. CAIPIRINHA sampling with doubled number of PLDs). Cerebral blood flow and arterial transit time fit uncertainties were compared and used as a quality measure.The single PLD measurements show an 11% TSNRPW increase using CAIPIRINHA sampling instead of GRAPPA sampling, while the non-accelerated scan exhibits 35% higher TSNRPW compared to the GRAPPA scan. However, taking advantage of the increased number of averages for multiple PLD acquisitions, a 14%/16% (gray matter) and 34%/36% (white matter) reduction of CBF fit uncertainty is observed with CAIPIRINHA sampling (6 PLDs/12 PLDs) compared to no acceleration.RESULTSThe single PLD measurements show an 11% TSNRPW increase using CAIPIRINHA sampling instead of GRAPPA sampling, while the non-accelerated scan exhibits 35% higher TSNRPW compared to the GRAPPA scan. However, taking advantage of the increased number of averages for multiple PLD acquisitions, a 14%/16% (gray matter) and 34%/36% (white matter) reduction of CBF fit uncertainty is observed with CAIPIRINHA sampling (6 PLDs/12 PLDs) compared to no acceleration.Accelerated single-shot 3D-GRASE with PCASL allows for smaller quantification uncertainties than time-matched segmented acquisitions. Corresponding single-shot acquisitions with acceptable blurring and no intra-volume motion render state-of-the-art ASL methods in a clinically feasible time possible.CONCLUSIONAccelerated single-shot 3D-GRASE with PCASL allows for smaller quantification uncertainties than time-matched segmented acquisitions. Corresponding single-shot acquisitions with acceptable blurring and no intra-volume motion render state-of-the-art ASL methods in a clinically feasible time possible.
Author	Pracht, Eberhard D. Kramme, Johanna Viviani, Roberto Stirnberg, Rüdiger Stöcker, Tony Boland, Markus Stingl, Julia
Author_xml	– sequence: 1 givenname: Markus surname: Boland fullname: Boland, Markus organization: German Center for Neurodegenerative Diseases (DZNE) – sequence: 2 givenname: Rüdiger surname: Stirnberg fullname: Stirnberg, Rüdiger organization: German Center for Neurodegenerative Diseases (DZNE) – sequence: 3 givenname: Eberhard D. surname: Pracht fullname: Pracht, Eberhard D. organization: German Center for Neurodegenerative Diseases (DZNE) – sequence: 4 givenname: Johanna surname: Kramme fullname: Kramme, Johanna organization: German Center for Neurodegenerative Diseases (DZNE) – sequence: 5 givenname: Roberto surname: Viviani fullname: Viviani, Roberto organization: University of Ulm – sequence: 6 givenname: Julia surname: Stingl fullname: Stingl, Julia organization: Federal Institute for Drugs and Medical Devices (BfArM) – sequence: 7 givenname: Tony surname: Stöcker fullname: Stöcker, Tony email: tony.stoecker@dzne.de organization: University of Bonn
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Snippet	Purpose To investigate the impact of accelerated, single‐shot 3D‐GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single... To investigate the impact of accelerated, single-shot 3D-GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single post-labeling... PurposeTo investigate the impact of accelerated, single‐shot 3D‐GRASE acquisition on quantitative arterial spin labeling (ASL) with multiple and single...
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SubjectTerms	3D‐GRASE Acceleration Blood flow Blurring Cerebral blood flow Delay Imaging Labeling Magnetic resonance imaging multiple post labeling delay Perfusion Programmable logic controllers pseudo‐continuous arterial spin labeling Sampling Shot single‐shot Spin labeling Substantia alba Substantia grisea Time measurement Transit time Uncertainty
Title	Accelerated 3D‐GRASE imaging improves quantitative multiple post labeling delay arterial spin labeling
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