Liver T2-weighted MR imaging: comparison of fast and conventional half-Fourier single-shot turbo spin-echo, breath-hold turbo spin-echo, and respiratory-triggered turbo spin-echo sequences

Radiology. 1997 Jun;203(3):766-72. doi: 10.1148/radiology.203.3.9169702.

Abstract

Purpose: T2-weighted spin-echo (SE) magnetic resonance imaging in the liver was compared with four sequences: fast and conventional half-Fourier single-shot turbo SE (HASTE) and breath-hold and respiratory-triggered turbo SE.

Materials and methods: In 58 patients with focal liver lesions, imaging was performed with a 1.5-T magnet and a phased-array coil. Images obtained with fast HASTE conventional HASTE, breath-hold turbo SE, and respiratory-triggered turbo SE were compared. Results of quantitative, qualitative, and receiver operating characteristic analyses were compared.

Results: Lesion-to-liver contrast for solid tumors was significantly higher with the fast HASTE and respiratory-triggered turbo SE sequences than with the conventional HASTE and breath-hold turbo SE sequences (P < .01) and for cystic lesions was significantly higher with the conventional and fast HASTE sequences than with the breath-hold or respiratory-triggered turbo SE sequences (P < .01). Artifacts were negligible on all fast and conventional HASTE images. In receiver operating characteristic analyses, diagnostic performance was significantly higher with the fast HASTE and respiratory-triggered turbo SE sequences than with the conventional HASTE and breath-hold turbo SE sequences (P < .01).

Conclusion: Images obtained with the fast HASTE sequence were free from motion artifacts, and observer diagnostic performance was similar to that with the respiratory-triggered turbo SE sequence.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Artifacts
  • Cysts / diagnosis
  • Female
  • Fourier Analysis
  • Humans
  • Image Enhancement / methods
  • Image Processing, Computer-Assisted
  • Liver / pathology
  • Liver Diseases / diagnosis*
  • Liver Neoplasms / diagnosis
  • Magnetic Resonance Imaging / methods*
  • Male
  • Middle Aged
  • Movement
  • Phantoms, Imaging
  • Prospective Studies
  • ROC Curve
  • Respiration