Title :
Denoising of MR Tomography Signal with Automatic Adjustment of Time-Variant Thresholds
Author :
Kubasek, Radek ; Gescheidtova, Eva
Author_Institution :
Fac. of Electr. Eng. & Commun., Brno Univ. of Tech.
Abstract :
Removing noise from an free induction decay (FID) signal is of fundamental significance in the analysis of results of magnetic resonance (MR) spectroscopy and tomography. Optimum solution can be seen in removing noise by means of a digital filter bank that uses half-band mirror frequency filters of the type of low-pass and high-pass filters. A filtering method using digital filters and the approach threshold adjustment is described in the paper
Keywords :
biomedical MRI; digital filters; high-pass filters; image denoising; low-pass filters; medical image processing; MR tomography signal denoising; automatic time-variant threshold adjustment; digital filter bank; free induction decay signal; half-band mirror frequency filters; high-pass filters; low-pass filters; magnetic resonance spectroscopy; Digital filters; Filter bank; Magnetic analysis; Magnetic noise; Magnetic resonance; Magnetic separation; Noise reduction; Signal analysis; Spectroscopy; Tomography;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1617017
