Abstract
A separate pulmonary vein (PV) is difficult to depict with the commonly used bright-blood magnetic resonance angiography method. Until now, no study has described the depiction of peripheral PVs without the artery. Our purpose in this study was to develop an arterial spin labeling (ASL)-based magnetic resonance angiography sequence to depict the pulmonary artery (PA) and vein separately. We developed such a sequence by using two inversion recovery pulses. The first pulse was non-selective, and the second pulse was selective and was applied to the aorta and heart. All studies were conducted on a 1.5-T clinical magnetic resonance system with six different inversion times for seven healthy volunteers. For evaluation, we categorized the inversion times by using visual scoring. Then, we used the magnitude image to evaluate the PA, and we used the real image to evaluate the PV. For the PA, an inversion time of 300 ms had the lowest score (1.43), and the score changed with increasing times; an inversion time of 1,100 ms had the highest score (3.85). For the PV, an inversion time of 300 ms had the highest score (2.68), and the score decreased with increasing times. The results indicated that the PA and vein could be depicted separately by the use of an ASL-based magnetic resonance angiography method. The optimal inversion times for the PV and artery were 300 and 1,100 ms, respectively.
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Tomoyuki Okuaki, Tetsuo Ogino, and Marc Van Cauteren are the employees of Philips Healthcare. Other authors do not have any conflict of interest associated with this study.
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Okuaki, T., Ishimoto, T., Miyati, T. et al. Separate pulmonary artery and vein magnetic resonance angiography by use of an arterial spin labeling method. Radiol Phys Technol 7, 352–357 (2014). https://doi.org/10.1007/s12194-014-0272-3
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DOI: https://doi.org/10.1007/s12194-014-0272-3