Your browser doesn't support javascript.
loading
RARE two-point Dixon with dual bandwidths.
Rydén, Henric; Berglund, Johan; Norbeck, Ola; Avventi, Enrico; Sprenger, Tim; van Niekerk, Adam; Skare, Stefan.
Afiliación
  • Rydén H; Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden.
  • Berglund J; Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
  • Norbeck O; Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
  • Avventi E; Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden.
  • Sprenger T; Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
  • van Niekerk A; Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden.
  • Skare S; Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
Magn Reson Med ; 84(5): 2456-2468, 2020 11.
Article en En | MEDLINE | ID: mdl-32333472
PURPOSE: To investigate the impact of dual readout bandwidths (dBW) in a dual echo fat/water acquisition and describe a dBW-rapid acquisition relaxation enhanced, or turbo spin echo sequence where the concept is used to improve SNR by removing dead times between refocusing pulses and avoiding redundant Chemical-shift encoded. METHODS: Cramér-Rao bounds and Monte Carlo simulations were used to investigate a two-point fat/water model where the difference in bandwidths is incorporated. In vivo images were acquired at 1.5 and 3 T with the dBW-rapid acquisition relaxation enhanced, or turbo spin echo sequence. Typical bandwidth ratios were 1:2. SNR was compared with a single bandwidth sequence under identical scan parameters at 3T. RESULTS: Monte Carlo simulations and Cramér-Rao analysis demonstrate that number of signal averages can be improved with dual bandwidths compared to conventional single bandwidth acquisitions. The dBW-rapid acquisition relaxation enhanced, or turbo spin echo sequence can acquire images with high readout resolutions with well-conditioned sampling. An SNR improvement of 52% was measured, in line with the theoretical gain of 54%. CONCLUSIONS: The proposed dBW-rapid acquisition relaxation enhanced, or turbo spin echo sequence is a highly SNR-efficient two-point rapid acquisition relaxation enhanced, or turbo spin echo sequence without dead times, and can acquire images at higher resolutions than current vendor-supplied alternatives.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen por Resonancia Magnética / Aumento de la Imagen Tipo de estudio: Health_economic_evaluation Idioma: En Revista: Magn Reson Med Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2020 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen por Resonancia Magnética / Aumento de la Imagen Tipo de estudio: Health_economic_evaluation Idioma: En Revista: Magn Reson Med Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2020 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Estados Unidos