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Breathhold imaging of the upper abdomen using a circular polarized-array coil: comparison with standard body coil imaging

  • J. Gauger
  • N. G. Holzknecht
  • C. -A. Lackerbauer
  • H. Sittek
  • K. E. Fiedler
  • R. Petsch
  • M. Reiser
Papers

Abstract

Current studies emphasize the use of array coils to decrease noise and increase the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). We applied Tl-weighted and T2-weighted standard nonbreathhold spin echo (SE) sequences and Tl-weighted FLASH, TurboFLASH, T2-weighted spin-echo time (TSE), and heavily T2-weighted half Fourier acquisition single-shot TSE (HASTE) sequences during breathhold for abdominal imaging in 15 normal volunteers. The breathhold scans were performed using both a standard coil and a circular polarized array coil. We analyzed the signal intensity (SI), SNR, and CNR of abdominal organs in all sequences. SNRs increased in all cases by an overall factor of ∼3 due to an 8% increase in overall Sis and a 50% decrease in noise when applying the array coil. Although the array-coil FLASH sequence performed at least as well as the respective SE sequence, the SNRs of the array-coil TurboFLASH, TSE breathhold, and HASTE sequences were generally lower. We conclude that array-coil imaging significantly improves fast imaging of the abdomen.

Keywords

abdomen magnetic resonance coil arrays magnetic resonance artifact magnetic resonance imaging 

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Copyright information

© Chapman & Hall 1996

Authors and Affiliations

  • J. Gauger
    • 1
  • N. G. Holzknecht
    • 1
  • C. -A. Lackerbauer
    • 1
  • H. Sittek
    • 1
  • K. E. Fiedler
    • 1
  • R. Petsch
    • 2
  • M. Reiser
    • 1
  1. 1.Department of Diagnostic Radiology, Klinikum GroßhadernLudwig-Maximilians-University MunichMünchenGermany
  2. 2.SIEMENS Medical Engineering GroupErlangenGermany

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