ViP-CSI Virtual Phantom Chemical Shift Imaging

Jie Liu (1, 2, 3) , Ahmad Karfoul (1, 3) , Longyu Jiang (2, 3) , Huazhong Shu (2, 3) , Hervé Saint-Jalmes (1, 4, 3) , Giulio Gambarota (1, 3)

1 LTSI - Laboratoire Traitement du Signal et de l'Image
2 LIST - Laboratory of Image Science and Technology [Nanjing]
3 CRIBS - Centre de Recherche en Information Biomédicale sino-français
4 CRLCC - CRLCC Eugène Marquis

To apply the Virtual Phantom (ViP) method for generating reference signals, to the chemical shift imaging (CSI) technique. The ViP method, previously used for generating reference images in magnetic resonance imaging (MRI), was here extended to generate reference peaks in the MR spectra acquired with a 2D-CSI sequence. Theoretical analysis was carried out to design the ViP signal. ViP-2D-CSI experiments were performed on a 4.7 Tesla MR scanner. Data analysis was carried out with the jMRUI software to fit the ViP peaks to determine their amplitude and frequency. Based on the theoretical analysis, it was found that the ViP peak could be generated by transmitting the ViP signal only in one repetition time of the 2D-CSI sequence. The amplitude and frequency of the ViP peak could be precisely adjusted and fine-tuned. The ViP peak was uniform over all CSI voxels, both in amplitude and in frequency. Furthermore, a good stability of the ViP reference amplitude and frequency was observed. The ViP method provides a means to generate a reference MR peak in 2D-CSI experiments. This could be of interest for signal quantification in CSI experiments.

Mots clés: virtual phantom (ViP); chemical shift imaging (CSI); physical phantom; ViP-2D-CSI

Domaines: Imagerie médicale

Jie Liu, Ahmad Karfoul, Longyu Jiang, Huazhong Shu, Hervé Saint-Jalmes, et al.. ViP-CSI Virtual Phantom Chemical Shift Imaging. Applied Magnetic Resonance, 2018, 49 (4), pp.369-380. ⟨10.1007/s00723-018-0981-6⟩. ⟨hal-01771213⟩