The injection of boluses of carbon dioxide (CO2) during T1-weighted magneti
c resonance angiography (MRA) resulted in sharp depiction of the vascular l
umen during the performance of in vitro and in vivo animal experiments. We
propose the use of the low-cost, relatively safe CO2 as a negative contrast
agent for MRA and speculate on its use In future interventional MRA. J. Ma
gn. Reson. Imaging 2000;12:595-598. (C) 2000 Wiley-Liss, Inc.