title: Oxygen-enhanced lung magnetic resonance imaging: influence of inversion pulse slice selectivity on inversion recovery half-Fourier single-shot turbo spin-echo signal.
abstract: OBJECTIVE
  The purpose of this study was to evaluate in vivo the influence of inversion pulse slice selectivity on oxygen-enhanced magnetic resonance imaging (MRI).
  
  
  METHODS
  Thirteen healthy volunteers were studied with a two-dimensional cardiac- and respiratory-gated adiabatic inversion-recovery half-Fourier single-shot turbo spin-echo (HASTE) sequence with either slice-selective or non-slice-selective inversion recovery (IR) pulse at inversion times increasing from 300 to 1400 ms. The signal-to-noise ratio (SNR) at every inversion time (TI), real signal difference (ΔSI), and relative enhancement ratio of lung parenchyma at TI ≥ 800 ms were statistically compared for oxygen-enhanced and non-oxygen-enhanced MR images with slice-selective or non-slice-selective IR pulses.
  
  
  RESULTS
  The SNRs of acquisitions with slice-selective IR pulses were significantly higher than those of non-slice-selective IR pulses (P < 0.05). At TI 800 ms, the ΔSI of lung parenchyma on IR-HASTE images with slice-selective inversion pulse type was significantly higher than on that with the non-slice-selective type (P < 0.05). Relative enhancement ratios of the slice-selective IR pulses were significantly lower than those of non-slice-selective IR pulses at TIs between 800 and 1400 ms (P < 0.05).
  
  
  CONCLUSIONS
  Slice selectivity of inversion pulse type affects oxygen-enhanced MRI in vivo.
authors: Department of Radiology, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan. daisuket@med.kobe-u.ac.jp
authors: Daisuke
authors: D
authors: Takenaka
authors: Michael
authors: M
authors: Puderbach
authors: Yoshiharu
authors: Y
authors: Ohno
authors: Frank
authors: F
authors: Risse
authors: Sebastian
authors: S
authors: Ley
authors: Kazuro
authors: K
authors: Sugimura
authors: Hans-Ulrich
authors: HU
authors: Kauczor
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