Hadamard NMR imaging with slice selection

Publication type:
Journal article
Metadata:
Autoren
  • H Nilgens
  • M Thelen
  • J Paff
  • P Blümler
  • B Blümich
DOI
10.1016/s0730-725x(96)00216-0
ISSN
0730-725X
Ausgabe der Veröffentlichung
7-8
Zeitschrift
Magnetic Resonance Imaging
Sprache
en
Paginierung
857 - 861
Datum der Veröffentlichung
1996
Status
Published
Herausgeber
Elsevier BV
Herausgeber URL
http://dx.doi.org/10.1016/s0730-725x(96)00216-0
Datum der Datenerfassung
2024
Titel
Hadamard NMR imaging with slice selection
Ausgabe der Zeitschrift
14

Data source: Crossref

Other metadata sources:
Abstract
Stochastic NMR imaging is one of the less common NMR imaging techniques. Nevertheless, stochastic rf excitation is characterized by some remarkable features: the rf excitation power is at least two orders of magnitude lower in comparison to conventionally pulsed NMR imaging schemes. Thus, the technique is of interest for imaging of large objects. The systematic noise inherent in images obtained with random noise excitation has been eliminated by using pseudorandom noise together with Hadamard transformation for data evaluation. Data acquisition times are comparable to those of ultrafast imaging techniques. For slice selection, z magnetization is destroyed outside the slice region with specially designed low power pulses. Thus, gradient switching times are only limited by T1 and not T2*. Images are reconstructed by the backprojection algorithm. We have set up a stochastic imaging procedure on a conventional Bruker MSL 300 spectrometer, and have drawn a comparison between images obtained by the pseudorandom noise excitation and by conventional Fourier imaging.
Addresses
  • Klinik mit Poliklinik für Radiologie, Johannes-Gutenberg-Universität, Mainz, Germany.
Autoren
  • H Nilgens
  • M Thelen
  • J Paff
  • P Blümler
  • B Blümich
DOI
10.1016/s0730-725x(96)00216-0
eISSN
1873-5894
Externe Identifier
  • PubMed Identifier: 8970095
Open access
false
ISSN
0730-725X
Ausgabe der Veröffentlichung
7-8
Zeitschrift
Magnetic resonance imaging
Schlüsselwörter
  • Magnetic Resonance Imaging
  • Magnetic Resonance Spectroscopy
  • Stochastic Processes
  • Fourier Analysis
  • Image Processing, Computer-Assisted
  • Signal Processing, Computer-Assisted
Sprache
eng
Medium
Print
Paginierung
857 - 861
Datum der Veröffentlichung
1996
Status
Published
Datum der Datenerfassung
1996
Titel
Hadamard NMR imaging with slice selection.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
14

Data source: Europe PubMed Central

Abstract
Stochastic NMR imaging is one of the less common NMR imaging techniques. Nevertheless, stochastic rf excitation is characterized by some remarkable features: the rf excitation power is at least two orders of magnitude lower in comparison to conventionally pulsed NMR imaging schemes. Thus, the technique is of interest for imaging of large objects. The systematic noise inherent in images obtained with random noise excitation has been eliminated by using pseudorandom noise together with Hadamard transformation for data evaluation. Data acquisition times are comparable to those of ultrafast imaging techniques. For slice selection, z magnetization is destroyed outside the slice region with specially designed low power pulses. Thus, gradient switching times are only limited by T1 and not T2*. Images are reconstructed by the backprojection algorithm. We have set up a stochastic imaging procedure on a conventional Bruker MSL 300 spectrometer, and have drawn a comparison between images obtained by the pseudorandom noise excitation and by conventional Fourier imaging.
Autoren
  • H Nilgens
  • M Thelen
  • J Paff
  • P Blümler
  • B Blümich
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/8970095
DOI
10.1016/s0730-725x(96)00216-0
ISSN
0730-725X
Ausgabe der Veröffentlichung
7-8
Zeitschrift
Magn Reson Imaging
Schlüsselwörter
  • Fourier Analysis
  • Image Processing, Computer-Assisted
  • Magnetic Resonance Imaging
  • Magnetic Resonance Spectroscopy
  • Signal Processing, Computer-Assisted
  • Stochastic Processes
Sprache
eng
Country
Netherlands
Paginierung
857 - 861
PII
S0730-725X(96)00216-0
Datum der Veröffentlichung
1996
Status
Published
Datum, an dem der Datensatz öffentlich gemacht wurde
1997
Titel
Hadamard NMR imaging with slice selection.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
14

Data source: PubMed

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