MAGNETIC-RESONANCE ASSESSMENT OF THE PULMONARY ARTERIAL TRUNK ANATOMY, FLOW, PULSATILITY AND DISTENSIBILITY
MAGNETIC-RESONANCE ASSESSMENT OF THE PULMONARY ARTERIAL TRUNK ANATOMY, FLOW, PULSATILITY AND DISTENSIBILITY
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DOI：
10.1093/eurheartj/14.11.1524
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发表时间：
1993-11-01
影响因子：
39.3
通讯作者：
LONGMORE, DB
中科院分区：
文献类型：
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作者：
PAZ, R;MOHIADDIN, RH;LONGMORE, DB
我们用磁共振成像和电影速度图研究了9名健康志愿者的肺分叉解剖，并测量了中央肺动脉的体积血流量、血流脉动度和动脉壁扩张性。采集多层、多平面自旋回波图像，显示肺分叉解剖。主肺动脉收缩内径为2.56±0.35 cm，舒张期内径为2.20±0.33 cm。右肺动脉(RPA)分别为1.57±0.29 cm和1.39±0.23 cm，左肺动脉(LPA)为1.79±0.26 cm和1.55±0.10 cm。然后用相移速度图梯度回波序列测量肺分叉两侧2 cm左右的Mpa、RPA和LPA的血流。时间平均流量由平均血流速度计算，血管横截面积为4.99±1.10L。Min−1 in Mpa，2.2 3±0.5 8 L。RPA最小−为1，LPA最小−为2.31±0.6 3。由峰前向血流、峰后向血流和时间平均血流计算的血流搏动指数分别为：Mpa 4 4±0 8，RPA 5 1±0 6，LPA 4 6±1 5。扩张性：Mpa 25.6±10.7，RPA 21.4±10.7，LPA 24.5±7.8。速度图MRI准确地显示了中央肺动脉的解剖、血流、扩张性和搏动性。
We used magnetic resonance imaging with cine velocity mapping to study the anatomy of pulmonary bifurcation and to measure volume blood flow, pulsatility of flow and arterial wall distensibility in the central pulmonary arteries of nine healthy volunteers. Multislice, multiplane spin echo images were acquired to display pulmonary bifurcation anatomy. Diameters of the main pulmonary artery (MPA) in systole were 2.56 ± 0.35 cm and in diastole 2.20 ± 0.33 cm. Those of the right pulmonary artery (RPA) were 1.57 ± 0.29 cm and 1.39 ± 0.23 respectively, and of the left pulmonary artery (LPA) 1.79 ± 0.26 cm and 1.55 ± 0.10 cm respectively. A gradient echo sequence with phase shift velocity mapping was then used to measure flow in MPA, RPA and LPA 2 cm on either side of the pulmonary bifurcation. Time averaged flow, calculated from mean velocity and the cross-sectional area of the vessels was 4.99 ± 1.10 l . min−1in MPA, 2.23 ± 0.58 l . min−1in RPA and 2.31 ± 0.63 l. min−1in LPA. The pulsatility index of flow derived from peak forward flow, peak backward flow and time averaged flow were as follows: MPA 4 4 ± 0.8, RPA 5.1 ± 0.6 and LPA 4.6 ± 1.5. Distensibility, calculated from the change in cross-sectional area between diastole and systole and expressed as percentage were as follows: MPA 25.6 ± 10.7, RPA 21.4 ± 10.7 and LPA 24.5 ± 7.8.MRI with velocity mapping accurately characterized anatomy, flow, distensibility and pulsatility of the central pulmonary arteries.