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Longo MGF, Conklin J, Cauley SF, Setsompop K, Tian Q, Polak D, Polackal M, Splitthoff D, Liu W, González RG, Schaefer PW, Kirsch JE, Rapalino O, Huang SY. Evaluation of Ultrafast Wave-CAIPI MPRAGE for Visual Grading and Automated Measurement of Brain Tissue Volume. AJNR Am J Neuroradiol 2020; 41:1388-1396. [PMID: 32732274 DOI: 10.3174/ajnr.a6703] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Accepted: 05/18/2020] [Indexed: 01/23/2023]
Abstract
BACKGROUND AND PURPOSE Volumetric brain MR imaging typically has long acquisition times. We sought to evaluate an ultrafast MPRAGE sequence based on Wave-CAIPI (Wave-MPRAGE) compared with standard MPRAGE for evaluation of regional brain tissue volumes. MATERIALS AND METHODS We performed scan-rescan experiments in 10 healthy volunteers to evaluate the intraindividual variability of the brain volumes measured using the standard and Wave-MPRAGE sequences. We then evaluated 43 consecutive patients undergoing brain MR imaging. Patients underwent 3T brain MR imaging, including a standard MPRAGE sequence (acceleration factor [R] = 2, acquisition time [TA] = 5.2 minutes) and an ultrafast Wave-MPRAGE sequence (R = 9, TA = 1.15 minutes for the 32-channel coil; R = 6, TA = 1.75 minutes for the 20-channel coil). Automated segmentation of regional brain volume was performed. Two radiologists evaluated regional brain atrophy using semiquantitative visual rating scales. RESULTS The mean absolute symmetrized percent change in the healthy volunteers participating in the scan-rescan experiments was not statistically different in any brain region for both the standard and Wave-MPRAGE sequences. In the patients undergoing evaluation for neurodegenerative disease, the Dice coefficient of similarity between volumetric measurements obtained from standard and Wave-MPRAGE ranged from 0.86 to 0.95. Similarly, for all regions, the absolute symmetrized percent change for brain volume and cortical thickness showed <6% difference between the 2 sequences. In the semiquantitative visual comparison, the differences between the 2 radiologists' scores were not clinically or statistically significant. CONCLUSIONS Brain volumes estimated using ultrafast Wave-MPRAGE show low intraindividual variability and are comparable with those estimated using standard MPRAGE in patients undergoing clinical evaluation for suspected neurodegenerative disease.
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Affiliation(s)
- M G F Longo
- From the Departments of Radiology (M.G.F.L., J.C., M.P., R.G.G., P.W.S., J.E.K., O.R., S.Y.H.)
| | - J Conklin
- From the Departments of Radiology (M.G.F.L., J.C., M.P., R.G.G., P.W.S., J.E.K., O.R., S.Y.H.).,Radiology, Athinoula A. Martinos Center for Biomedical Imaging, (J.C., S.F.C., K.S., Q.T., D.P., S.Y.H.), Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School (J.C., S.F.C., K.S., R.G.G., P.W.S., S.Y.H.), Boston, Massachusetts
| | - S F Cauley
- Radiology, Athinoula A. Martinos Center for Biomedical Imaging, (J.C., S.F.C., K.S., Q.T., D.P., S.Y.H.), Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School (J.C., S.F.C., K.S., R.G.G., P.W.S., S.Y.H.), Boston, Massachusetts
| | - K Setsompop
- Radiology, Athinoula A. Martinos Center for Biomedical Imaging, (J.C., S.F.C., K.S., Q.T., D.P., S.Y.H.), Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School (J.C., S.F.C., K.S., R.G.G., P.W.S., S.Y.H.), Boston, Massachusetts.,Harvard-MIT Division of Health Sciences and Technology (K.S., S.Y.H.), Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Q Tian
- Radiology, Athinoula A. Martinos Center for Biomedical Imaging, (J.C., S.F.C., K.S., Q.T., D.P., S.Y.H.), Massachusetts General Hospital, Boston, Massachusetts
| | - D Polak
- Radiology, Athinoula A. Martinos Center for Biomedical Imaging, (J.C., S.F.C., K.S., Q.T., D.P., S.Y.H.), Massachusetts General Hospital, Boston, Massachusetts.,Department of Physics and Astronomy (D.P.), Heidelberg University, Heidelberg, Germany.,Siemens (D.P., D.S., W.L.), Erlangen, Germany
| | - M Polackal
- From the Departments of Radiology (M.G.F.L., J.C., M.P., R.G.G., P.W.S., J.E.K., O.R., S.Y.H.)
| | | | - W Liu
- Siemens (D.P., D.S., W.L.), Erlangen, Germany
| | - R G González
- From the Departments of Radiology (M.G.F.L., J.C., M.P., R.G.G., P.W.S., J.E.K., O.R., S.Y.H.).,Harvard Medical School (J.C., S.F.C., K.S., R.G.G., P.W.S., S.Y.H.), Boston, Massachusetts
| | - P W Schaefer
- From the Departments of Radiology (M.G.F.L., J.C., M.P., R.G.G., P.W.S., J.E.K., O.R., S.Y.H.).,Harvard Medical School (J.C., S.F.C., K.S., R.G.G., P.W.S., S.Y.H.), Boston, Massachusetts
| | - J E Kirsch
- From the Departments of Radiology (M.G.F.L., J.C., M.P., R.G.G., P.W.S., J.E.K., O.R., S.Y.H.)
| | - O Rapalino
- From the Departments of Radiology (M.G.F.L., J.C., M.P., R.G.G., P.W.S., J.E.K., O.R., S.Y.H.)
| | - S Y Huang
- From the Departments of Radiology (M.G.F.L., J.C., M.P., R.G.G., P.W.S., J.E.K., O.R., S.Y.H.).,Radiology, Athinoula A. Martinos Center for Biomedical Imaging, (J.C., S.F.C., K.S., Q.T., D.P., S.Y.H.), Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School (J.C., S.F.C., K.S., R.G.G., P.W.S., S.Y.H.), Boston, Massachusetts.,Harvard-MIT Division of Health Sciences and Technology (K.S., S.Y.H.), Massachusetts Institute of Technology, Cambridge, Massachusetts
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