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Feasibility of ASL spinal bone marrow perfusion imaging with optimized inversion time
Author(s) -
Xing Dong,
Zha Yunfei,
Yan Liyong,
Wang Kejun,
Gong Wei,
Lin Hui
Publication year - 2015
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.24891
Subject(s) - perfusion , reproducibility , magnetic resonance imaging , nuclear medicine , perfusion scanning , medicine , correlation , nuclear magnetic resonance , correlation coefficient , volunteer , biomedical engineering , mathematics , radiology , physics , statistics , geometry , biology , agronomy
Purpose To assess the correlation between flow‐sensitive alternating inversion recovery (FAIR) and dynamic contrast‐enhanced magnetic resonance imaging (DCE‐MRI) in the measurement of spinal bone marrow (SBM) perfusion; in addition, to assess for an optimized inversion time (TI) as well as the reproducibility of SBM FAIR perfusion. Materials and Methods The optimized TI of a FAIR SBM perfusion experiment was carried out on 14 volunteers; two adjacent vertebral bodies were selected from each volunteer to measure the change of signal intensity (ΔM) and the signal‐to‐noise ratio (SNR) of FAIR perfusion MRI with five different TIs. Then, reproducibility of FAIR data from 10 volunteers was assessed by the reposition SBM FAIR experiments. Finally, FAIR and DCE‐MRI were performed on 27 subjects. The correlation between the blood flow on FAIR (BF ASL ) and perfusion‐related parameters on DCE‐MRI was evaluated. Results The maximum value of ΔM and SNR were 36.39 ± 12.53 and 2.38 ± 0.97, respectively; both were obtained when TI was near 1200 msec. There were no significant difference between the two successive measurements of SBM BF ASL perfusion ( P = 0.879), and the within‐subject coefficients of variation (wCV) of the measurements was 3.28%. The BF ASL showed a close correlation with K trans ( P < 0.001) and K ep ( P = 0.004), and no correlation with V e ( P = 0.082) was found. Conclusion 1200 msec was the optimal TI for the SBM ASL perfusion image, which led to the maximum ΔM and a good quality perfusion image. The SBM FAIR perfusion scan protocol has good reproducibility, and as blood flow measurement on FAIR is reliable and closely related with the parameters on DCE‐MRI, FAIR is feasible for measuring SBM blood flow. J. Magn. Reson. Imaging 2015;42:1314–1320.