Klarhöfer M, Csapo B, Balassy C, Szeles J C, Moser E
Arbeitsgruppe NMR, Institut für Medizinische Physik, Universität Wien, Vienna, Austria.
Magn Reson Med. 2001 Apr;45(4):716-9. doi: 10.1002/mrm.1096.
MR phase contrast blood flow velocity measurements in the human index finger were performed with triggered, nontriggered, and cine acquisition schemes. A strong (G(max) = 200 mT/m), small bore (inner diameter 12 cm) gradient system inserted in a whole body 3 Tesla MR scanner allowed high-resolution imaging at short echo times, which decreases partial volume effects and flow artifacts. Arterial blood flow velocities ranging from 4.9-19 cm/sec were measured, while venous blood flow was significantly slower at 1.5-7.1 cm/sec. Taking into account the corresponding vessel diameters ranging from 800 microm to 1.8 mm, blood flow rates of 3.0-26 ml/min in arteries and 1.2-4.8 ml/min in veins are obtained. The results were compared to ultrasound measurements, resulting in comparable blood flow velocities in the same subjects. Magn Reson Med 45:716-719, 2001.
采用触发、非触发和电影采集方案对人体食指进行磁共振相位对比血流速度测量。将一个强梯度系统（G(max)=200 mT/m）、小口径（内径12 cm）插入全身3特斯拉磁共振扫描仪中，可在短回波时间下进行高分辨率成像，从而减少部分容积效应和流动伪影。测量得到动脉血流速度范围为4.9 - 19 cm/秒，而静脉血流速度明显较慢，为1.5 - 7.1 cm/秒。考虑到相应血管直径范围为800微米至1.8毫米，得出动脉血流速率为3.0 - 26毫升/分钟，静脉血流速率为1.2 - 4.8毫升/分钟。将结果与超声测量结果进行比较，同一受试者的血流速度具有可比性。《磁共振医学》4(5):716 - 719, 2001年。
