Koktzoglou Ioannis, Edelman Robert R
Department of Radiology, Evanston Northwestern Healthcare, Evanston, Illinois 60201, USA.
Magn Reson Med. 2009 Jan;61(1):117-24. doi: 10.1002/mrm.21769.
Signal Targeting with Alternating Radiofrequency (STAR) and STAR and Flow-Independent Relaxation Enhancement (STARFIRE) are noncontrast methods for flow-dependent and flow-independent magnetic resonance angiography (MRA). The methods rely on the acquisition and complex subtraction of two image sets alternately labeled by spatially selective or spatially nonselective inversion radio frequency (RF) pulses. Experimental results show that the RF labeling period affects the extent of the carotid vessels seen with STAR imaging, and the conspicuity of cerebrospinal fluid (CSF) and fat in the STARFIRE images. Both methods were found to provide more detailed depiction of the carotid arteries than the alternative noncontrast MRA technique of time-of-flight (TOF) angiography.
交替射频信号靶向（STAR）以及STAR与血流无关的弛豫增强（STARFIRE）是用于血流依赖和血流无关的磁共振血管造影（MRA）的非对比方法。这些方法依赖于交替采集由空间选择性或空间非选择性反转射频（RF）脉冲标记的两组图像并进行复数相减。实验结果表明，RF标记期会影响STAR成像中所见颈动脉血管的范围，以及STARFIRE图像中脑脊液（CSF）和脂肪的清晰度。与飞行时间（TOF）血管造影这种替代的非对比MRA技术相比，发现这两种方法都能更详细地描绘颈动脉。
