Erratum to: Rapid simultaneous acquisition of macromolecular tissue volume, susceptibility, and relaxometry maps (Magnetic Resonance in Medicine, (2022), 87, 2, (781-790), 10.1002/mrm.28995)

Fang Frank Yu, Susie Yi Huang, Ashwin Kumar, Thomas Witzel, Congyu Liao, Tanguy Duval, Julien Cohen-Adad, Berkin Bilgic

Research output: Contribution to journalComment/debatepeer-review

Abstract

Dear Editors, In the abstract, the number of subjects should be changed from 3 to 4. The updated abstract sections appear below: Methods Four adults were imaged on a 3T scanner using a multi-echo 3D GRE sequence acquired at three head orientations. MTV, QSM, R2*, T1, and proton density maps were reconstructed. The sequence (GRAPPA R = 4) was also performed in subject #1 with a single head orientation, and subject #4 to assess reproducibility. Fully sampled data was acquired in subject #2, from which retrospective undersampling was performed (R = 6 GRAPPA and R = 9 JVC-GRAPPA). Prospective undersampling was performed in subject #3 (R = 6 GRAPPA and R = 9 JVC-GRAPPA) using gradient blips to shift k-space sampling in later echoes. Results Subject #1 and #4 showed that multi-orientation and single-orientation MTV maps did not differ significantly. For subject #2, the retrospectively undersampled JVC-GRAPPA and GRAPPA generated similar results as fully sampled data. This approach was validated with the prospectively undersampled images (subject #3). Combining QSM, R2*, and MTV, the contributions of myelin and iron to susceptibility was estimated. In the Methods section 2.1 of the manuscript, the number of subjects should likewise be changed from 3 to 4. The update manuscript section appears below: 2.1 | Data acquisition Four healthy adult volunteers were scanned on a 3T scanner (Siemens Skyra) with a 64-channel head coil in accordance with IRB-approved protocol.24 We regret these errors in our manuscript. CONFLICT OF INTEREST The authors do not have any conflicts of interest to report.

Original languageEnglish (US)
JournalMagnetic resonance in medicine
DOIs
StateAccepted/In press - 2022

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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