Free-breathing renal magnetic resonance angiography with steady-state free-precession and slab-selective spin inversion combined with radial k-space sampling and water-selective excitation

Marcus Katoh, Elmar Spuentrup, Matthias Stuber, Romhild Hoogeveen, Rolf W. Günther, Arno Buecker

Research output: Contribution to journalArticlepeer-review

Abstract

The impact of radial k-space sampling and water-selective excitation on a novel navigator-gated cardiac-triggered slab-selective inversion prepared 3D steady-state free-precession (SSFP) renal MR angiography (MRA) sequence was investigated. Renal MRA was performed on a 1.5-T MR system using three inversion prepared SSFP approaches: Cartesian (TR/TE: 5.7/2.8 ms, FA: 85°), radial (TR/TE: 5.5/2.7 ms, FA: 85°) SSFP, and radial SSFP combined with water-selective excitation (TR/TE: 9.9/4.9 ms, FA: 85°). Radial data acquisition lead to significantly reduced motion artifacts (P < 0.05). SNR and CNR were best using Cartesian SSFP (P < 0.05). Vessel sharpness and vessel length were comparable in all sequences. The addition of a water-selective excitation could not improve image quality. In conclusion, radial k-space sampling reduces motion artifacts significantly in slab-selective inversion prepared renal MRA, while SNR and CNR are decreased. The addition of water-selective excitation could not improve the lower CNR in radial scanning.

Original languageEnglish (US)
Pages (from-to)1228-1233
Number of pages6
JournalMagnetic resonance in medicine
Volume53
Issue number5
DOIs
StatePublished - May 2005

Keywords

  • Radial k-space sampling
  • Renal MR angiography
  • Slab-selective inversion prepulse
  • Steady-state free-precession (SSFP)
  • Water-selective excitation

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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