TY - JOUR
T1 - Single-shot half-Fourier RARE sequence with ultra short inter-echo spacing for lung imaging
AU - Ohno, Yoshiharu
AU - Oshio, Koichi
AU - Uematsu, Hidemasa
AU - Nakatsu, Masashi
AU - Gefter, Warren B.
AU - Hatabu, Hiroto
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/8
Y1 - 2004/8
N2 - Purpose: To improve the image quality of pulmonary magnetic resonance (MR) imaging using an ultra-short interecho spacing half-Fourier single shot rapid acquisition with relaxation enhancement (USHA-RARE) sequence. Materials and Methods: Pulmonary MR images were acquired by USHA-RARE sequence with various inter-echo spacings. The sequence parameters were as follows: repetition time (TR)/effective TE: infinite/39-41 msec; section thickness: 10 mm; acquisition matrix: 128 × 128; field of view: 450 × 450 mm. Inter-echo spacing varied (2.5 msec, 3.0 msec, 3.5 msec, 4.0 msec, 4.5 msec, 5.0 msec), and the respective phase-encoding steps were 80, 77, 75, 74, 73, and 72. Signal-to-noise ratios (SNRs), the signal ratios between lung and fat (lung-to-fat ratio: LFRs), and the signal ratios between the lung and the serratus anterior muscle (lung-to-muscle ratio: LMRs) of each inter-echo spacing were calculated, and statistically evaluated. Results: The SNRs at inter-echo spacings of ≤ 3.0 msec were significantly higher than those ≥ 4.0 msec (P < 0.05). The LFRs and LMRs at inter-echo spacing ≤ 3.0 msec were significantly higher than those ≥ 4.0 msec (P < 0.05). Conclusion: USHA-RARE sequence does improve signal intensity from the lung.
AB - Purpose: To improve the image quality of pulmonary magnetic resonance (MR) imaging using an ultra-short interecho spacing half-Fourier single shot rapid acquisition with relaxation enhancement (USHA-RARE) sequence. Materials and Methods: Pulmonary MR images were acquired by USHA-RARE sequence with various inter-echo spacings. The sequence parameters were as follows: repetition time (TR)/effective TE: infinite/39-41 msec; section thickness: 10 mm; acquisition matrix: 128 × 128; field of view: 450 × 450 mm. Inter-echo spacing varied (2.5 msec, 3.0 msec, 3.5 msec, 4.0 msec, 4.5 msec, 5.0 msec), and the respective phase-encoding steps were 80, 77, 75, 74, 73, and 72. Signal-to-noise ratios (SNRs), the signal ratios between lung and fat (lung-to-fat ratio: LFRs), and the signal ratios between the lung and the serratus anterior muscle (lung-to-muscle ratio: LMRs) of each inter-echo spacing were calculated, and statistically evaluated. Results: The SNRs at inter-echo spacings of ≤ 3.0 msec were significantly higher than those ≥ 4.0 msec (P < 0.05). The LFRs and LMRs at inter-echo spacing ≤ 3.0 msec were significantly higher than those ≥ 4.0 msec (P < 0.05). Conclusion: USHA-RARE sequence does improve signal intensity from the lung.
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U2 - 10.1002/jmri.20107
DO - 10.1002/jmri.20107
M3 - Article
C2 - 15269963
AN - SCOPUS:3242801268
SN - 1053-1807
VL - 20
SP - 336
EP - 339
JO - Journal of Magnetic Resonance Imaging
JF - Journal of Magnetic Resonance Imaging
IS - 2
ER -