Article Figures & Data
Figures
- Fig 1.
Transverse T2 fluid-attenuated inversion recovery MR image (A) and single-voxel spectra obtained in a 19-year-old male patient with brain abscess by using PRESS localization at 3T with TE = 40 ms (B) and TE = 144 ms (C). Succ indicates succinate; Ac, acetate; Ala, alanine; Lac, lactate; Lip, lipids; AA, amino acids.
- Fig 2.
Transverse postcontrast T1-weighted MR image (A) and single-voxel proton MR spectra obtained in a 42-year-old female patient with brain abscess by using PRESS localization at 3T with TE = 144 ms (B) and TE = 288 ms (C). Ala, indicates alanine; Lac, lactate; AA, amino acids.
- Fig 3.
Spectra from a phantom that contained 10 mmol/L of alanine to illustrate the anomalous J-modulation effect of the PRESS sequence at TE = 144 ms obtained from a 3T scanner, with the identical setting in the receiver gain at TE = 144 (A) and TE = 288 ms (B). Note at 1.47 ppm the incompletely inverted phase and reduced amplitude of the methyl doublet in the TE = 144 ms spectrum, evidence of the presence of an anomalous J-modulation effect.
- Fig 4.
Spectra from a phantom that contained only valine at TE = 40 ms (A) and TE = 144 ms (B). The complex doublets between 0.90 and 1.06 ppm show a clearly inverted phase at TE = 144 ms.
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