Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 신태훈 | * |
dc.date.accessioned | 2021-02-25T16:31:51Z | - |
dc.date.available | 2021-02-25T16:31:51Z | - |
dc.date.issued | 2021 | * |
dc.identifier.issn | 0740-3194 | * |
dc.identifier.other | OAK-28867 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/257173 | - |
dc.description.abstract | Purpose: To evaluate both velocity and spatial responses of velocity-selective arterial spin labeling (VS-ASL), using velocity-insensitive and velocity-compensated waveforms for control modules, as well as a novel dynamic phase-cycling approach, at different B0/ (Formula presented.) field inhomogeneities. Methods: In the presence of imperfect refocusing, the mechanism of phase-cycling the refocusing pulses through four dynamics was first theoretically analyzed with the conventional velocity-selective saturation (VSS) pulse train. Numerical simulations were then deployed to compare the performance of the Fourier-transform based velocity-selective inversion (FT-VSI) with these three different schemes in terms of both velocity and spatial responses under various B0/ (Formula presented.) conditions. Phantom and human brain scans were performed to evaluate the three methods at (Formula presented.) scales of 0.8, 1.0, and 1.2. Results: The simulations of FT-VSI showed that, under nonuniform B0/ (Formula presented.) conditions, the scheme with velocity-insensitive control was susceptible to DC bias of the static spins as systematic error, while the scheme with velocity-compensated control had deteriorated velocity-selective labeling profiles and, thus, reduced labeling efficiency. Through numerical simulation, phantom scans, and brain perfusion measurements, the dynamic phase-cycling method demonstrated considerable improvements over these issues. Conclusion: The proposed dynamic phase-cycling approach was demonstrated for the velocity-selective label and control modules with both velocity and spatial responses robust to a wide range of B0 and (Formula presented.) field inhomogeneities. © 2020 International Society for Magnetic Resonance in Medicine | * |
dc.language | English | * |
dc.publisher | John Wiley and Sons Inc | * |
dc.subject | arterial spin labeling | * |
dc.subject | B1+ field inhomogeneity | * |
dc.subject | B0 field inhomogeneity | * |
dc.subject | cerebral blood flow | * |
dc.subject | velocity-selective inversion | * |
dc.title | Ensuring both velocity and spatial responses robust to B0/B1+ field inhomogeneities for velocity-selective arterial spin labeling through dynamic phase-cycling | * |
dc.type | Article | * |
dc.relation.issue | 5 | * |
dc.relation.volume | 85 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 2723 | * |
dc.relation.lastpage | 2734 | * |
dc.relation.journaltitle | Magnetic Resonance in Medicine | * |
dc.identifier.doi | 10.1002/mrm.28622 | * |
dc.identifier.wosid | WOS:000617694700029 | * |
dc.identifier.scopusid | 2-s2.0-85097287011 | * |
dc.author.google | Liu D. | * |
dc.author.google | Li W. | * |
dc.author.google | Xu F. | * |
dc.author.google | Zhu D. | * |
dc.author.google | Shin T. | * |
dc.author.google | Qin Q. | * |
dc.contributor.scopusid | 신태훈(15061749900) | * |
dc.date.modifydate | 20240322132527 | * |