Improved image reconstruction from sensitivity-encoded data by wavelet denoising and tikhonov regularization

Zhi Pei Liang, Roland Bammer, Jim Ji, Norbert J. Pelc, Gary H. Glover

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Parallel magnetic resonance imaging through sensitivity encoding using multiple receiver coils has emerged as an effective tool to reduce imaging time. However, errors in both the estimated coil sensitivity maps and the measured data, and the ill-conditioned nature of the coefficient matrix (often associated with non-localized coils) can degrade image quality significantly, limiting speed enhancements. In this paper, we propose to use wavelet denoising to reduce noise in the coil sensitivity maps and a specially-designed TIkhonov regularization scheme to solve the ill-conditioned matrix equation. Experimental results show that these techniques produce significantly better images (with an improved signal-to-noise ratio and reduced aliasing artifacts) than conventional reconstruction methods based on matrix inversion with a diagonal regularization matrix.

Original languageEnglish
Title of host publication2002 IEEE International Symposium on Biomedical Imaging, ISBI 2002 - Proceedings
PublisherIEEE Computer Society
Pages493-496
Number of pages4
Volume2002-January
ISBN (Electronic)078037584X
DOIs
Publication statusPublished - 2002
Externally publishedYes
EventIEEE International Symposium on Biomedical Imaging, ISBI 2002 - Washington, United States
Duration: 7 Jul 200210 Jul 2002

Other

OtherIEEE International Symposium on Biomedical Imaging, ISBI 2002
CountryUnited States
CityWashington
Period7/7/0210/7/02

Fingerprint

Computer-Assisted Image Processing
Signal-To-Noise Ratio
Image reconstruction
Artifacts
Noise
Magnetic Resonance Imaging
Imaging techniques
Magnetic resonance
Image quality
Signal to noise ratio

ASJC Scopus subject areas

  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

Cite this

Liang, Z. P., Bammer, R., Ji, J., Pelc, N. J., & Glover, G. H. (2002). Improved image reconstruction from sensitivity-encoded data by wavelet denoising and tikhonov regularization. In 2002 IEEE International Symposium on Biomedical Imaging, ISBI 2002 - Proceedings (Vol. 2002-January, pp. 493-496). [1029302] IEEE Computer Society. https://doi.org/10.1109/ISBI.2002.1029302

Improved image reconstruction from sensitivity-encoded data by wavelet denoising and tikhonov regularization. / Liang, Zhi Pei; Bammer, Roland; Ji, Jim; Pelc, Norbert J.; Glover, Gary H.

2002 IEEE International Symposium on Biomedical Imaging, ISBI 2002 - Proceedings. Vol. 2002-January IEEE Computer Society, 2002. p. 493-496 1029302.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Liang, ZP, Bammer, R, Ji, J, Pelc, NJ & Glover, GH 2002, Improved image reconstruction from sensitivity-encoded data by wavelet denoising and tikhonov regularization. in 2002 IEEE International Symposium on Biomedical Imaging, ISBI 2002 - Proceedings. vol. 2002-January, 1029302, IEEE Computer Society, pp. 493-496, IEEE International Symposium on Biomedical Imaging, ISBI 2002, Washington, United States, 7/7/02. https://doi.org/10.1109/ISBI.2002.1029302
Liang ZP, Bammer R, Ji J, Pelc NJ, Glover GH. Improved image reconstruction from sensitivity-encoded data by wavelet denoising and tikhonov regularization. In 2002 IEEE International Symposium on Biomedical Imaging, ISBI 2002 - Proceedings. Vol. 2002-January. IEEE Computer Society. 2002. p. 493-496. 1029302 https://doi.org/10.1109/ISBI.2002.1029302
Liang, Zhi Pei ; Bammer, Roland ; Ji, Jim ; Pelc, Norbert J. ; Glover, Gary H. / Improved image reconstruction from sensitivity-encoded data by wavelet denoising and tikhonov regularization. 2002 IEEE International Symposium on Biomedical Imaging, ISBI 2002 - Proceedings. Vol. 2002-January IEEE Computer Society, 2002. pp. 493-496
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