Dousset V, Franconi J M, Degrèze P, Balderrama J, Lexa F, Caillé J M
Service de Neuroradiologie, Hopital Universitaire Pellegrin, Bordeaux, France.
Neuroradiology. 1994 Apr;36(3):188-92. doi: 10.1007/BF00588128.
To improve 3D-time of flight (3D-TOF) magnetic resonance angiography, we used magnetisation transfer (MT) to increase the contrast between flowing blood and stationary tissues. With a 1.5 KHz off-resonance radio-frequency MT applied for 16 ms at a maximum power within specific absorption rate (SAR) limits, a 37% decrease in the signal of white matter was obtained, whereas the signal from flowing blood decreased by only 8%. An improvement in maximum intensity projection (MIP) image quality was obtained all MT-3DTOF studies on seven volunteers using progressively more powerful MT pulses. Routine clinical use of MT-3DTOF appears promising and can be achieved at any strength field.
为了改进三维时间飞跃法（3D-TOF）磁共振血管造影，我们使用磁化传递（MT）来增加流动血液与静止组织之间的对比度。在特定吸收率（SAR）限制内，以最大功率施加1.5千赫兹的失谐射频MT持续16毫秒，白质信号降低了37%，而流动血液的信号仅降低了8%。在对七名志愿者进行的所有MT-3DTOF研究中，使用逐渐增强的MT脉冲，最大强度投影（MIP）图像质量得到了改善。MT-3DTOF的常规临床应用似乎很有前景，并且在任何强度场都可以实现。
