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We evaluated short echo time two-dimensional  1 H magnetic resonance spectroscopy (2D- 1 HMRS) with the point-resolved spatial selection (PRESS) protocol in temporal lobe epilepsy (TLE) patients with negative magnetic resonance imaging (MRI) findings and described the characteristics of 2D- 1 HMRS in the epileptic focus. Thirty-eight TLE patients with negative conventional MRI findings and 10 healthy controls were studied by 2D- 1 HMRS. A 128-channel prolonged video-electroencephalographic (EEG) method was used as the standard for epileptogenic focus localization to evaluate N-acetyl aspartate/(choline + creatine + phospho - creatine) (NAA/[Cho + Cr–PCr]), glutamate + glutamine/creatine (Glx/Cr–PCr) and myo-inositol/Cr–PCr ratios in patients with negative MRI findings. The 2D- 1 HMRS showed that 32/38 patients and all healthy controls had stable baselines and good signal-to-noise ratios. Compared with the healthy controls, 32 patients showed abnormal NAA/(Cho + Cr–PCr) ratios in the hippocampus and, in 25 of these patients, focus lateralization agreed with the EEG. It is concluded that short echo time 2D- 1 HMRS with the PRESS protocol can help find abnormalities in lateralization of temporal epilepsy in patients with negative MRI findings.

journal of international medical research

Use of Short Echo Time Two-Dimensional <sup>1</sup>H-Magnetic Resonance Spectroscopy in Temporal Lobe Epilepsy with Negative Magnetic Resonance Imaging Findings

Use of Short Echo Time Two-Dimensional 1H-Magnetic Resonance Spectroscopy in Temporal Lobe Epilepsy with Negative Magnetic Resonance Imaging Findings

Use of Short Echo Time Two-Dimensional ¹H-Magnetic Resonance Spectroscopy in Temporal Lobe Epilepsy with Negative Magnetic Resonance Imaging Findings