Easy improvement of signal-to-noise in RARE-sequences with low refocusing flip angles. Rapid acquisition with relaxation enhancement

Magn Reson Med. 2000 Dec;44(6):983-5. doi: 10.1002/1522-2594(200012)44:6<983::aid-mrm23>3.0.co;2-8.

Abstract

It is demonstrated that the signal intensity in a RARE (TSE, FS...)-sequence with low refocusing flip angle alpha can be significantly increased by setting the flip angle of the first refocusing pulse to 90 degrees +alpha/2. In addition to the gain in signal intensity, the initial signal modulations over the first few echoes are reduced compared to a CPMG-echo train with constant alpha.

Publication types

  • Comparative Study

MeSH terms

  • Artifacts*
  • Magnetic Resonance Imaging / instrumentation
  • Magnetic Resonance Imaging / methods*
  • Magnetic Resonance Imaging / statistics & numerical data
  • Phantoms, Imaging