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For: Leroi L, Coste A, de Rochefort L, Santin MD, Valabregue R, Mauconduit F, Giacomini E, Luong M, Chazel E, Valette J, Le Bihan D, Poupon C, Boumezbeur F, Rabrait-Lerman C, Vignaud A. Simultaneous multi-parametric mapping of total sodium concentration, T₁, T₂ and ADC at 7 T using a multi-contrast unbalanced SSFP. Magn Reson Imaging 2018;53:156-163. [PMID: 30055291 DOI: 10.1016/j.mri.2018.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/23/2018] [Accepted: 07/23/2018] [Indexed: 01/10/2023]

For:	Leroi L, Coste A, de Rochefort L, Santin MD, Valabregue R, Mauconduit F, Giacomini E, Luong M, Chazel E, Valette J, Le Bihan D, Poupon C, Boumezbeur F, Rabrait-Lerman C, Vignaud A. Simultaneous multi-parametric mapping of total sodium concentration, T₁, T₂ and ADC at 7 T using a multi-contrast unbalanced SSFP. Magn Reson Imaging 2018;53:156-163. [PMID: 30055291 DOI: 10.1016/j.mri.2018.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/23/2018] [Accepted: 07/23/2018] [Indexed: 01/10/2023]

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Cited by Other Article(s)

Leroi L, Gras V, Boulant N, Ripart M, Poirion E, Santin MD, Valabregue R, Mauconduit F, Hertz‐Pannier L, Le Bihan D, Rochefort L, Vignaud A. Simultaneous proton density, T 1 , T 2 , and flip‐angle mapping of the brain at 7 T using multiparametric 3D SSFP imaging and parallel‐transmission universal pulses. Magn Reson Med 2020;84:3286-3299. [DOI: 10.1002/mrm.28391] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/28/2020] [Accepted: 06/02/2020] [Indexed: 12/15/2022]

Gomolka RS, Ciritsis A, Rossi C. ²³ Na-T₁ quantification with saturation recovery TrueFISP and variable flip angle GRE at 3T: A phantom study. Magn Reson Med 2020;84:3300-3307. [PMID: 32544302 DOI: 10.1002/mrm.28333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 04/11/2020] [Accepted: 05/01/2020] [Indexed: 11/05/2022]

Abstract

PURPOSE

The aim of the current study was to compare the reproducibility of sodium (²³ Na)-T₁ estimation using a centric-reordered saturation recovery (SR) true fast imaging with steady-state precession (TrueFISP) and a variable flip angle (VFA) spoiled gradient echo (GRE). Additionally, we evaluated the effect of spatial averaging on ²³ Na-T₁ estimation by the two methods.

METHODS

Measurements were performed in the phantom, consisting of 10 dm³ volume rectangular polyethylene container filled with distilled water solution of 0.6% NaCl + 0.004% CuSO₄ , using a dual-tunable ²³ Na/¹ H coil at 3 Tesla. ²³ Na images were acquired for FOV = 384 × 384 mm² and voxel size = 6 × 6 × 6 mm³ using: (1) TrueFISP: TR/TE = 900/1.5 ms, flip angle = 90°, bandwidth = 450 Hz/px, and (2) GRE: TR/TE = 30/1.5 ms, bandwidth = 350 Hz/px. ²³ Na-T₁ weightings were obtained with nonselective saturation prepulses delayed from the center of the k-space acquisition by 25/40/60/130/280 ms (SR-TrueFISP) and by applying different nominal flip angles: 10°/30°/50°/70°/90° (VFA-GRE). Both sequences were acquired twice, applying 20 and 30 spatial averages. The resulting images were B₁ -corrected with a double-angle GRE method.

RESULTS

Image acquisition varied from 5:41 to 9:37 for TrueFISP and from 12:48 to 19:12 min for GRE using 20 and 30 spatial averages, respectively. Higher averaging increased the acquisition time by 53% and mean SNR at scan < 10%, without an effect on ²³ Na-T₁ estimations with both methods (SR-Truefisp |Δ| = 1.58 ms, VFA-GRE |Δ| = 0.53 ms; for SNR P < .001). Overall, mean ± SD of ²³ Na-T₁ was found as 51 ± 3 ms with SR-TrueFISP and 53 ± 2 ms with VFA-GRE.

CONCLUSION

Both SR-TrueFISP and VFA-GRE provided similar ²³ Na-T₁ estimates based on the phantom measurements with isotropic resolution.

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Gomolka RS, Ciritsis A, Meier A, Rossi C. Quantification of sodium T1 in abdominal tissues at 3 T. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2019;33:439-446. [DOI: 10.1007/s10334-019-00786-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 09/10/2019] [Accepted: 10/04/2019] [Indexed: 02/02/2023]