Estimation of pulse wave velocity in main pulmonary artery with phase contrast MRI: Preliminary investigation

被引:31
作者
Peng, Hsu-Hsia
Chung, Hsiao-Wen
Yu, Hsi-Yu
Tseng, Wen-Yih I.
机构
[1] Natl Taiwan Univ, Coll Med, Ctr Optoelect Biomed, Taipei, Taiwan
[2] Natl Taiwan Univ Hosp, Dept Med Imaging, Taipei, Taiwan
[3] Natl Taiwan Univ Hosp, Dept Surg, Taipei, Taiwan
[4] Natl Taiwan Univ, Dept Elect Engn, Taipei, Taiwan
关键词
pulse wave velocity; main pulmonary artery; phase contrast imaging; pulmonary arterial hypertension; noninvasive measurement;
D O I
10.1002/jmri.20782
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose: To assess the feasibility and reproducibility of a noninvasive MRI method to measure pulse wave velocity (PWV) in the main pulmonary artery (MPA). Materials and Methods: A total of 17 subjects without,, history of pulmonary diseases (38.2 +/- 18.4 years) participated in this study. Series of MR velocity maps of the MPA were acquired at 2 cm. above the pulmonary valves using a two-dimensional phase-contrast sequence. Effective temporal resolution was 11 msec after interleaving two dynamic series with different values of electrocardiograph (ECG) trigger delay. PAY was derived as the rate of MPA flow variations per unit change in MPA cross-sectional area, during early systole. Seven healthy subjects underwent three repetitive examinations to investigate intrascan and interscan reproducibility. Results: Flow vs. area was highly linear in the MPA during early systole, with Pearson's coefficients ranging from 0.982 to 0.999, rendering derivation of PWV with little difficulty. Average value of PWV in MPA was 1.96 +/- 0.27 m/second, in good agreement with literature values measured using invasive means. The percentage intra- and interscan differences were 5.46% and -10.86%, respectively. Conclusion: Phase-contrast MRI to noninvasively measure PWV in the MPA is feasible with good reproducibility.
引用
收藏
页码:1303 / 1310
页数:8
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