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The Development of Signal Processing Software for Single-and Multi-Voxel MR Spectroscopy  

Paik, Moon-Young (Graduate School of Medical Imaging Science Inje Univ. of Korea)
Lee, Hyun-Yong (Dept. of Diagnositc Radiology, Paik Hospital of Korea)
Shin, Oun-Jae (Dept. of Diagnositc Radiology, Paik Hospital of Korea)
Eun, Choong-Ki (Dept. of Diagnostic Radiology, College of Medicine, Inje Uni. of Krea)
Mu, Chi-Woong (Dept. of Biomedical Engineering, Inje Univ. of Korea)
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Abstract
The aim of this study is to develop the $^1H$-MRS data postprocessing software for both single-voxel and multi-voxel technique, which plays and important role as a diagnostic tool in clinical field. This software is based on graphical user interface(GUI) under windows operating system of personal computer(PC). In case of single-voxel MRS, both of raw data in time-domain and spectrum data in frequency-domain are simultaneously displayed in a screen. Several functions such as DC correction, zero filling, line broadening, Lorentz-Gauss filtering and phase correction, etc. are included to increase the quality of spectrum data. In case of multi-voxel analysis, spectroscopic image reconstructed by 3-D FFT was displayed as a spectral grid and overlapped over previously obtained T1- or T2-weighted image for the spectra to be spatially registered with the image. The analysis of MRS peaks were performed by obtaining the ratio of peak area. In single-voxel method, statistically processed peak-area ratios of MRS data obtained from normal human brain are presented. Using multi-voxel method, MR spectroscopic image and metabolite image acquired from brain tumor are demonstrated.
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