R. Vosshenrich et al., USE OF THE RACE TECHNIQUE FOR QUANTITATIVE FLOW MEASUREMENTS - EVALUATION USING A CLINICALLY RELEVANT FLOW MODEL, RoFo. Fortschritte auf dem Gebiete der Rontgenstrahlen und der neuenbildgebenden Verfahren, 158(6), 1993, pp. 550-554
A phantom has been designed for measuring flow velocities; using pipes
of specified diameter and selectable pulse rates, flow rates varying
from 0-250 cm/s can be determined. The measurements are made in a supe
rconductive magnet with a field strength of 1.5 Tesla, employing a RAC
E technique. The reference technique was electromagnetic flow measurem
ent. There was good linear correlation between the electromagnetic and
the MRT results with a correlation coefficient of 0.98. It is necessa
ry in the first place to estimate flow speed; if flow velocity is unkn
own initially, there is no correlation. Hence, in everyday use erroneo
us results may be obtained, particularly since one cannot always demon
strate vessels in all parts of the body without superimposition. Furth
er clinical studies are required in various vascular territories to ev
aluate the usefulness of the RACE technique for flow measurements.